Management of Syphilis in Patients with HIV

Purpose of This Guideline

Sexually Transmitted Infections Guidelines Committee, February 2018

This guideline on treatment of syphilis in adult patients with HIV was developed by the New York State Department of Health (NYSDOH) AIDS Institute (AI) to guide primary care providers and other practitioners in New York State in treating patients with HIV and syphilis coinfection. Accordingly, this guideline addresses the following topics in the management of syphilis: transmission and prevention, screening, diagnosis, reporting, treatment, and post-treatment monitoring. This guideline aims to achieve the following goals:

• Increase the number of New York State residents with HIV and syphilis coinfection who are identified and treated with effective interventions.
• Support the NYSDOH Prevention Agenda 2013-2018 to reduce the case rate of primary and secondary syphilis by 10% to no more than 10.1 cases per 100,000 men and 0.4 cases per 100,000 women and reduce disparities for specific populations that are disproportionally affected by syphilis infection [NYSDOH 2010, 2015].
• Reduce the growing burden of morbidity and mortality associated with syphilis infection.
• Integrate current evidence-based clinical recommendations into the healthcare-related implementation strategies of the Ending the Epidemic initiative, which seeks to end the AIDS epidemic in New York State by the end of 2020.

The Burden of Syphilis Infection

Syphilis, a systemic infection caused by the bacterium Treponema pallidum, is the third most frequently reported sexually transmitted infection (STI) in the United States behind chlamydia and gonorrhea [CDC 2017a]. Syphilis and other ulcer-producing STIs are risk factors for acquiring or transmitting HIV infection because they directly increase the likelihood that genital secretions will contain an infectious amount of HIV-1 [CDC 2016]. In addition, syphilis infection might indicate ongoing sexual behaviors that place a person at increased risk of acquiring or transmitting HIV infection [Pathela et al. 2015].

Since 2001, rates of primary and secondary syphilis—the most infectious stages of the disease—have increased annually in the United States [CDC 2017a], especially among HIV-infected men who have sex with men (MSM) [CDC 2002, 2017a]. In 2016, case counts and rates of primary and secondary syphilis were the highest recorded nationally since 1994 at 27,814 and 8.7 cases per 100,000, respectively [CDC 2017a]. Men, who accounted for almost 90% of new primary and secondary syphilis cases in 2016, are disproportionately affected. MSM accounted for 58.1% of all primary and secondary syphilis cases overall, and 47% of MSM with syphilis reportedly had HIV [CDC 2017a]. The rate of reported primary and secondary syphilis cases in women increased by 35.7% to 3,049 cases during 2015-2016, and the rate of congenital syphilis increased by 27.6% to 628 cases.

New York ranks fifth among the 50 states in rates of primary and secondary syphilis, with 2,455 cases reported in 2016 [CDC 2017a].

Figure 1: Syphilis Cases Reported in New York State and Nationwide, 2016 [CDC 2017a]
New York State (including New York City)	Nationwide
7,795 cases (all stages) reported in 2016 2,455 primary and secondary cases, an increase of 18.3% from 2015 13 congenital cases, a 7.7% increase from 2015	88,042 cases (all stages) reported in 2016 27,814 primary and secondary cases reported, an increase of 17.6% from 2015 628 cases of congenital cases, an increase of 27.6% from 2015

Long-term infection can affect multiple organ systems, including the brain, nerves, eyes, heart, blood vessels, liver, bones, and joints [CDC 2017b], and can cause visual impairment, stroke [CDC 2016], or death. Up to 40% of cases of untreated syphilis in pregnant women results in infant death. Infants who survive can have cataracts, deafness, or seizures.

STIs pose individual, social, and financial burdens and lead to costly health complications, including those affecting reproductive health, fetal and perinatal health, and transmission of HIV infection [ODPHP 2017]. Data suggest that the annual, direct cost of treating STIs in the United States is $15.6 billion, with HIV infection accounting for $12.6 billion and syphilis $39.3 million [Owusu-Edusei et al. 2013].

The Role of Primary Care Providers in New York State

The goal of this guideline is to aid primary care providers and other clinicians in New York State in diagnosing and treating syphilis infection in adult patients with HIV. Primary care providers are often the first to see patients with STI symptoms. Nurses in New York State are authorized to execute non-patient specific orders and protocols (ordered by a physician or nurse practitioner) for administering HIV testing and medically screening at-risk persons for syphilis, chlamydia and/or gonorrhea. As such, primary care providers and other clinicians assume a major role in the diagnosis and treatment of patients with HIV and STIs and in counseling patients to avoid or prevent high-risk behaviors that might lead to STIs.

The NYSDOH AI STI Committee has developed a set of measures designed to assess providers’ quality of STI care and treatment and identify areas for improvement, with the goal of reversing the rising rate of STI transmissions and recognizing sexual health as a primary care priority.

Development of This Guideline

This guideline was developed by the NYSDOH AI Clinical Guidelines Program, which is a collaborative effort between the NYSDOH AI Office of the Medical Director and the Johns Hopkins University School of Medicine, Division of Infectious Diseases.

Established in 1986, the goal of the Clinical Guidelines Program is to develop and disseminate evidence-based, state-of-the-art clinical practice guidelines to improve the quality of care provided to people with HIV, hepatitis C virus, and STIs and to improve drug user health and LGBT health throughout the State of New York. NYSDOH AI guidelines are developed by committees of clinical experts through a consensus-driven process.

The NYSDOH AI charged the Sexually Transmitted Infections Guidelines Committee with developing evidence-based clinical recommendations for primary care clinicians in New York State who treat patients with syphilis infection. The resulting recommendations are based on an extensive review of the medical literature and reflect consensus among this panel of STI experts. Each recommendation is rated for strength and for quality of the evidence (see below). If recommendations are based on expert opinion, the rationale for the opinion is included.

AIDS Institute HIV Clinical Guidelines Program Recommendations Rating Scheme
Strength of Recommendation	Quality of Supporting Evidence
A = Strong	1 = At least 1 randomized trial with clinical outcomes and/or validated laboratory endpoints
B = Moderate	2 = One or more well-designed, nonrandomized trial or observational cohort study with long-term clinical outcomes
C = Optional	3 = Expert opinion

References

Centers for Disease Control and Prevention (CDC). Primary and secondary syphilis among men who have sex with men–New York City, 2001. MMWR Morb Mortal Wkly Rep 2002;51(38):853-6. [PMID: 12363336]

Centers for Disease Control and Prevention (CDC). Reported STDs in the United States: 2015 National Data for Chlamydia, Gonorrhea, and Syphilis. 2016 Oct. https://www.cdc.gov/nchhstp/newsroom/docs/factsheets/std-trends-508.pdf [accessed 2018 Feb 13]

Centers for Disease Control and Prevention (CDC). Sexually Transmitted Disease Surveillance 2016. 2017 Oct 17. https://www.cdc.gov/std/stats16/CDC_2016_STDS_Report-for508WebSep21_2017_1644.pdf [accessed 2018 Feb 13]

Centers for Disease Control and Prevention (CDC). Syphilis – CDC Fact Sheet (Detailed). 2017 Feb 13. https://www.cdc.gov/std/syphilis/stdfact-syphilis-detailed.htm [accessed 2018 Feb 13]

New York State Department of Health (NYSDOH). New York State Prevention Agenda 2013-2018: Priorities, Focus Areas, Goals and Objectives, 1/25/2013 (revised March 16, 2015). 2015 Mar 16. https://www.health.ny.gov/prevention/prevention_agenda/2013-2017/tracking_indicators.htm [accessed 2018 Feb 13]

New York State Department of Health (NYSDOH). The Burden of Sexually Transmitted Diseases. 2010 Jun. https://www.health.ny.gov/prevention/prevention_agenda/infectious_disease/std.htm [accessed 2018 Feb 13]

Office of Disease Prevention and Health Promotion (ODPHP). Sexually Transmitted Diseases. 2017 Apr 12. https://www.healthypeople.gov/2020/topics-objectives/topic/sexually-transmitted-diseases [accessed 2018 Feb 13]

Owusu-Edusei K, Jr., Chesson HW, Gift TL, et al. The estimated direct medical cost of selected sexually transmitted infections in the United States, 2008. Sex Transm Dis 2013;40(3):197-201. [PMID: 23403600]

Pathela P, Braunstein SL, Blank S, et al. The high risk of an HIV diagnosis following a diagnosis of syphilis: a population-level analysis of New York City men. Clin Infect Dis 2015;61(2):281-7. [PMID: 25870333]

Transmission and Prevention

Sexually Transmitted Infections Guidelines Committee, February 2018

RECOMMENDATIONS

Transmission and Prevention Clinicians should inform patients with HIV about the risk of acquiring syphilis and other sexually transmitted infections (STIs) from close physical contact with all sites of possible exposure, including the anus, cervix, vagina, urethra, tongue, oropharynx, or any other location where infectious lesions may be present. (A3) Patient Education When patients with HIV are diagnosed with early syphilis (primary, secondary, or early latent stage), clinicians should educate patients about the following: Risk-reduction strategies, including the value of condom use (A2) The potential for oral transmission of syphilis (A3), The benefits of identifying infection early (A3), and The need for prompt evaluation and therapy for sex partners (A3).

Syphilis and other STIs are transmitted primarily through close physical contact involving genital, rectal, or oral mucosal surfaces. Patients should be informed about the risk of acquiring syphilis at all sites of possible exposure and about oral transmission, which is a route that is often not considered [CDC 2002]. Education about the value of condom use should also be provided. Consistent and correct condom use may reduce the risk of syphilis acquisition by up to 70% [Holmes et al. 2004]; however, clinicians should inform patients that syphilis may be transmitted at areas that are not covered by a condom, such as the groin [Koss et al. 2009] or mouth.

In patients with HIV, syphilis acquisition poses additional risk because genital ulcer disease has been associated with an increased risk of HIV transmission to sex partners who do not have HIV [Fleming and Wasserheit 1999; Dickerson et al. 1996; Telzak et al. 1993]. Importantly, the presence of herpes simplex virus, syphilis, or chancroid ulcers in patients with HIV directly increases the likelihood that genital secretions will contain an infectious amount of HIV-1 that may come in contact with genital mucosal cells receptive to HIV-1 infection.

References

Centers for Disease Control and Prevention (CDC). Primary and secondary syphilis among men who have sex with men–New York City, 2001. MMWR Morb Mortal Wkly Rep 2002;51(38):853-6. [PMID: 12363336]

Dickerson MC, Johnston J, Delea TE, et al. The causal role for genital ulcer disease as a risk factor for transmission of human immunodeficiency virus. An application of the Bradford Hill criteria. Sex Transm Dis 1996;23(5):429-40. [PMID: 8885077]

Fleming DT, Wasserheit JN. From epidemiological synergy to public health policy and practice: the contribution of other sexually transmitted diseases to sexual transmission of HIV infection. Sex Transm Infect 1999;75(1):3-17. [PMID: 10448335]

Holmes KK, Levine R, Weaver M. Effectiveness of condoms in preventing sexually transmitted infections. Bull World Health Organ 2004;82(6):454-61. [PMID: 15356939]

Koss CA, Dunne EF, Warner L. A systematic review of epidemiologic studies assessing condom use and risk of syphilis. Sex Transm Dis 2009;36(7):401-5. [PMID: 19455075]

Telzak EE, Chiasson MA, Bevier PJ, et al. HIV-1 seroconversion in patients with and without genital ulcer disease. A prospective study. Ann Intern Med 1993;119(12):1181-6. [PMID: 8239249]

Screening

Sexually Transmitted Infections Guidelines Committee, February 2018

RECOMMENDATIONS

Serologic Screening Clinicians should obtain serologic screening for syphilis at least annually for all patients with HIV (see Table 2: Screening and Diagnostic Tests for Syphilis and Table 3: Interpretation of Results of Reverse-Sequence Testing for Syphilis). (A2) In response to the current epidemiology in NYS, clinicians should perform syphilis screening every 3 months (A3) for HIV-infected men who have sex with men (MSM) at highest risk of syphilis infection, including those who: Report, or whose partners report, multiple or anonymous sex partners. (A3) Have been, or whose sex partners have been, diagnosed with or treated for a bacterial sexually transmitted infection (STI) since the last evaluation. (A3) Engage, or whose sex partners may engage, in sexual activity at sex parties or other high-risk venues. (A3) Are involved, or whose sex partners may be involved, in transactional sex (e.g., sex workers and their clients). (A3) Report recreational substance use during sexual activity. (A3) Self-identify as at high risk of STIs. (A3) Screening in Pregnancy Clinicians should obtain serologic screening for syphilis for pregnant patients with HIV at the first prenatal visit, during the third trimester (28 to 32 weeks of gestation), and at delivery. (A2) See Screening for Syphilis Infection in Pregnancy: U.S. Preventive Services Task Force Reaffirmation Recommendation Statement for information about syphilis screening during pregnancy [Curry, et al. 2018].

Frequency

All patients with HIV should be screened for syphilis at least once per year. Diagnosis of syphilis during the primary and secondary stages of disease, which occur within the first year after infection, not only requires less-intensive treatment than at later stages but also allows for earlier identification and treatment of sex partners.

Men who have sex with men (MSM) who engage, or whose partners may engage, in continued high-risk behavior should be screened for syphilis at least every 3 months. Factors that may prompt more frequent screening include multiple or anonymous sex partners, sexual activity at sex parties or other high-risk venues, or involvement in transactional sex (e.g., sex workers and their clients) [Golub, et al. 2016]. The diagnosis of another bacterial STI in a patient with HIV or a patient’s sex partner should prompt a clinician to perform a syphilis screening test and to consider more frequent screening for syphilis. Intensified syphilis screening for MSM at high risk may increase the identification of early or secondary syphilis, and early intervention may decrease the duration of infectiousness [Bissessor, et al. 2010]. Nearly every region in New York State (NYS) reported an increase in the incidence of syphilis infections in 2015, with the overwhelming majority of cases occurring among MSM [NYSDOH 2014].

Congenital syphilis cases increased by 185% in the United States between 2014 and 2018 [CDC 2019] and by 200% in NYS outside of New York City (NYC) during that same time frame [NYSDOH unpublished data]. NYC experienced a 185% increase in congenital syphilis cases from 2017 to 2018 [New York City Department of Health and Mental Hygiene 2019]. An investigation of 68 cases of congenital syphilis from NYC published in 2018 revealed that screening for syphilis did not occur prior to delivery in 37% of cases due to a lack of prenatal care (21/26) or lack of a performed screening test during care (5/26). Another 30% of identified cases occurred in individuals who acquired syphilis during pregnancy but after receiving a time-appropriate nonreactive screening test result [Slutsker, et al. 2018]. Given the historically high rates of congenital syphilis in NYS, recent data regarding acquisition of syphilis during pregnancy and the known benefits of treatment of syphilis during pregnancy, this committee recommends an additional screening test be performed early in the third trimester at 28 to 32 weeks of gestation. Other entities, including the U.S. Preventive Services Task Force (USPSTF) [Curry, et al. 2018], the 2015 CDC STD Treatment Guidelines [Workowski and Bolan 2015], the American College of Obstetrics and Gynecology (ACOG) and the American College of Pediatrics [AAP and ACOG 2017], recommend screening at the first visit and at delivery during all pregnancies and recommend third-trimester screening for all pregnant individuals at high risk of exposure and after exposure to an untreated sex partner. Individuals who live in high-prevalence communities, or have HIV, or have a history of incarceration or commercial sex work are considered at high risk of exposure [Curry, et al. 2018]. In April 2018, the NYC Department of Health and Mental Hygiene also recommended screening for syphilis at first visit, at 28 weeks of gestation, and at delivery for all pregnant patients [NYCDHMH 2019].

KEY POINTS

STI screening should be performed every 3 months for persons at high risk regardless of the frequency of their HIV monitoring visits. Regular assessment of ongoing risk behavior enables clinicians to determine the appropriate frequency of screening. Clinicians can seek training to enhance their comfort with sexual history-taking and to develop nonjudgmental approaches to educating patients about the importance of STI screening. The NYSDOH Clinical Education Initiative and the New York City STD/HIV Prevention Training Center provide HIV-related educational resources and training for providers.

Laboratory tests used in screening for syphilis are described in Table 1: Screening and Diagnostic Tests for Syphilis, below, with additional information in Table 2: Screening and Diagnostic Tests for Syphilis. Figures 3 and 4, in the guideline section on Syphilis and Neurosyphilis: Presentation, Diagnosis, and Reporting, illustrate the standard and reverse protocols for syphilis screening and diagnosis.

Serologic Testing

Nontreponemal tests: Rapid plasma reagin (RPR) or venereal disease research laboratory (VDRL) are nonspecific quantitative tests that result from the cross-reaction of human cardiolipin-lecithin in syphilis infection. The tests correlate with disease activity and are used to follow the clinical course and determine the effectiveness of treatment. During primary syphilis, the nontreponemal tests usually become positive approximately 7 to 10 days after the onset of the chancre.

KEY POINT

Because the nontreponemal tests are negative in approximately 20% of cases presenting with a chancre (i.e., primary ulcer), patients presenting with an ulcer that has the clinical presentation of a chancre (painless, indurated ulcer with a clean base and smooth borders) should be tested with both treponemal and nontreponemal tests and should receive presumptive treatment for primary syphilis (see the Treatment and Follow-Up section of this guideline).

The sensitivity of these tests is near 100% during secondary syphilis. Serum reagin levels are typically low (<1:8) in primary syphilis and higher (>1:32) in secondary syphilis; serum reagin levels are variable thereafter and may serorevert to negative in approximately 25% of untreated patients (usually 2 years after the infection). Serum samples containing large amounts of nontreponemal reagin occasionally demonstrate a false-negative reaction, known as a prozone reaction [Jurado et al. 1993]. When there is clinical suspicion for syphilis but the nontreponemal test result is negative, clinicians should order laboratory dilution and retesting of the sample. Many laboratories perform dilution as part of their internal protocol; however, in highly suspicious cases with negative nontreponemal tests, communication with the laboratory is necessary to confirm that the sample was retested after dilution. Nontreponemal tests may be false-positive in the setting of medical conditions other than syphilis, including HIV infection; collagen vascular diseases; narcotic drug use; advanced age; pregnancy; chronic liver disease; some viral infections, such as Epstein-Barr virus; and other chronic inflammatory conditions (i.e., biological false-positive nontreponemal test) [CDC 2011; Hernandez-Aguado et al. 1998; Park et al. 2011].

Treponemal tests: The fluorescent treponemal antibody test, T. pallidum particle agglutination, and syphilis IgG or IgG/IgM enzyme-linked immunosorbent assay or enzyme immunoassay/chemiluminescence immunoassay tests are treponemal assays that measure antibody to surface protein of T. pallidum. The treponemal tests are more specific than nontreponemal tests and become reactive approximately 7 to 10 days after the appearance of the chancre. A treponemal test should be explicitly ordered during primary infection. Treponemal tests do not correlate with disease activity and remain positive for life in approximately 80% of patients, even after effective treatment.

Table 1: Sensitivity of Serologic Tests in Untreated Syphilis*§
Test	Stage of Disease (Percent Positive [Range])
	Primary	Secondary	Latent	Tertiary
VDRL	78 (74-87)	100	95 (88-100)	71 (37-94)
RPR	86 (77-99)	100	98 (95-100)	73
FTA-Abs§	84 (70-100)	100	97 (97-100)	96
Treponemal Agglutination§	76 (69-90)	100	97 (97-100)	94
EIA	93	100	100	–
EIA, enzyme immunoassay; FTA-Abs, fluorescent treponemal antibody test; RPR, rapid plasma reagin; VDRL, venereal disease research laboratory. §FTA-Abs and T. pallidum particle agglutination are generally considered equally sensitive in the primary stage of disease. *Reprinted from Centers for Disease Control and Prevention [CDC 2013].

Considerations for serology in patients with HIV: Serologic test results for the majority of patients with HIV and syphilis are consistent with those seen in non-HIV-infected patients with syphilis; however, there have been reports of atypical serologies in patients coinfected with HIV and syphilis as described below:

• Patients with HIV may have false-positive nontreponemal reagin test results (RPR/VDRL). In one study, 4% of patients with HIV tested had false-positive RPR results [Rompalo et al. 1992].
• Seroreactivity may be delayed or absent in patients with HIV. Rare cases have been reported of biopsy-proven secondary syphilis in patients with HIV with negative syphilis serologies [Tikjob et al. 1991].
• Patients with HIV may have higher mean serologic serum nontreponemal reagin levels than do patients without HIV [Rolfs et al. 1997].
• Serum nontreponemal reagin levels may decline more slowly after treatment in patients with HIV than in patients without HIV [Rolfs et al. 1997; Marra et al. 1996; Yinnon et al. 1996].
• No correlation has been found between serologic response to therapy and CD4 count [Rolfs et al. 1997].
• Prozone reaction occurs more commonly in patients with HIV [Schofer et al. 1996].

Lesion-Based Testing (Identification of T. Pallidum)

Direct fluorescent antibody test: A direct fluorescent antibody test can be performed on lesion exudate or tissue specimen. There are no differences in test performance characteristics among patients with and without HIV.

Darkfield microscopy: Examination of exudate from an ulcer base or a mucocutaneous lesion under darkfield microscopy can identify the spirochete (T. pallidum). This test is invalid for oral samples and is typically available only in specialized centers; local health department may be consulted for availability. There are no differences in test performance characteristics among patients with and without HIV.

Silver stain: Spirochetes may be seen in biopsy specimens of suspicious lesions such as palmar macular rash or gummatous lesions. There are no differences in test performance characteristics among patients with and without HIV.

Polymerase chain reaction (PCR): PCR can be performed on specimens of lesions to detect DNA from T. pallidum. In comparison with swab, the sensitivity of PCR is significantly lower when samples from peripheral blood mononuclear cells, plasma, serum, and whole-blood fractions are used [Grange et al. 2012].

References

AAP and ACOG. 2017. Guidelines for Perinatal Care, 8th Edition.

Bissessor M, Fairley CK, Leslie D, et al. Frequent screening for syphilis as part of HIV monitoring increases the detection of early asymptomatic syphilis among HIV-positive homosexual men. J Acquir Immune Defic Syndr 2010;55(2):211-6. [PMID: 20585261]

CDC. Sexually transmitted disease surveillance 2018. 2019 Oct 1. https://stacks.cdc.gov/view/cdc/79370 [accessed 2020 Jan 21]

CDC. Discordant results from reverse sequence syphilis screening–five laboratories, United States, 2006-2010. MMWR Morb Mortal Wkly Rep 2011;60(5):133-7. [PMID: 21307823]

CDC. Self-Study STD Modules for Clinicians–Syphilis: Patient Management/Treatment. 2013 Aug. https://www.std.uw.edu/custom/self-study/syphilis [accessed 2018 Feb 13]

Curry SJ, Krist AH, Owens DK, et al. Screening for Syphilis Infection in Pregnant Women: US Preventive Services Task Force Reaffirmation Recommendation Statement. JAMA 2018;320(9):911-917. [PMID: 30193283]

Golub SA, Pena S, Boonrai K, et al. STI Data From Community-Based PrEP Implementation Suggest Changes to CDC Guidelines. CROI; 2016 Feb 22-25; Boston, MA. http://www.croiconference.org/sessions/sti-data-community-based-prep-implementation-suggest-changes-cdc-guidelines-0

Grange PA, Gressier L, Dion PL, et al. Evaluation of a PCR test for detection of treponema pallidum in swabs and blood. J Clin Microbiol 2012;50(3):546-52. [PMID: 22219306]

Hernandez-Aguado I, Bolumar F, Moreno R, et al. False-positive tests for syphilis associated with human immunodeficiency virus and hepatitis B virus infection among intravenous drug abusers. Valencian Study Group on HIV Epidemiology. Eur J Clin Microbiol Infect Dis 1998;17(11):784-7. [PMID: 9923520]

Jurado RL, Campbell J, Martin PD. Prozone phenomenon in secondary syphilis. Has its time arrived? Arch Intern Med 1993;153(21):2496-8. [PMID: 7832818]

Marra CM, Longstreth WT, Jr., Maxwell CL, et al. Resolution of serum and cerebrospinal fluid abnormalities after treatment of neurosyphilis. Influence of concomitant human immunodeficiency virus infection. Sex Transm Dis 1996;23(3):184-9. [PMID: 8724507]

NYCDHMH. 2019 DOHMH Alert #8. 2019 Apr 11. https://www1.nyc.gov/assets/doh/downloads/pdf/han/alert/2019/congenital-syphilis-cases-in-nyc.pdf [accessed 2019 Dec 31]

NYSDOH. Syphilis Alert. 2014 Feb. http://m4project.com/health/syphilis-alert-new-york-state-department-of-health [accessed 2019 Apr 12]

NYSDOH unpublished data.

Park IU, Chow JM, Bolan G, et al. Screening for syphilis with the treponemal immunoassay: analysis of discordant serology results and implications for clinical management. J Infect Dis 2011;204(9):1297-304. [PMID: 21930610]

Rolfs RT, Joesoef MR, Hendershot EF, et al. A randomized trial of enhanced therapy for early syphilis in patients with and without human immunodeficiency virus infection. The Syphilis and HIV Study Group. N Engl J Med 1997;337(5):307-14. [PMID: 9235493]

Rompalo AM, Cannon RO, Quinn TC, et al. Association of biologic false-positive reactions for syphilis with human immunodeficiency virus infection. J Infect Dis 1992;165(6):1124-6. [PMID: 1583332]

Schofer H, Imhof M, Thoma-Greber E, et al. Active syphilis in HIV infection: a multicentre retrospective survey. The German AIDS Study Group (GASG). Genitourin Med 1996;72(3):176-81. [PMID: 8707318]

Slutsker JS, Hennessy RR, Schillinger JA. Factors Contributing to Congenital Syphilis Cases – New York City, 2010-2016. MMWR Morb Mortal Wkly Rep 2018;67(39):1088-1093. [PMID: 30286056] https://www.ncbi.nlm.nih.gov/pubmed/30286056

Tikjob G, Russel M, Petersen CS, et al. Seronegative secondary syphilis in a patient with AIDS: identification of Treponema pallidum in biopsy specimen. J Am Acad Dermatol 1991;24(3):506-8. [PMID: 2061457]

Workowski KA, Bolan GA. Sexually transmitted diseases treatment guidelines, 2015. MMWR Recomm Rep 2015;64(Rr-03):1-137. [PMID: 26042815] https://www.ncbi.nlm.nih.gov/pubmed/26042815

Yinnon AM, Coury-Doniger P, Polito R, et al. Serologic response to treatment of syphilis in patients with HIV infection. Arch Intern Med 1996;156(3):321-5. [PMID: 8572843]

Obtaining a Sexual History

Sexually Transmitted Infections Guidelines Committee, February 2018

RECOMMENDATION

Sexual History Clinicians should ask all patients about sexual behaviors and new sex partners at each routine monitoring visit to assess for risk behaviors that require repeat or ongoing screening. (A3)

When obtaining a sexual history, questions should focus primarily on the patient’s sexual behavior and not solely on sexual and gender identity (e.g., avoid use of such labels as “lesbian,” “homosexual,” or “gay” or “transgender”).  A study conducted in New York City found that self-reported sexual identity could not independently establish patients’ risk. Many men who have sex with men (MSM) in the study did not identify as “gay,” underscoring the importance of assessing sexual behavior when determining a patient’s risk [Bernstein et al. 2008; Pathela et al. 2006]. Transgender people differ widely in terms of sexual behavior and anatomy. It is helpful to ask about the type of sex a person is having and the parts of anatomy used for sex, as well as about the anatomy of partners [CETH 2016]. A patient’s openness to discuss his or her sexual and gender identity may be important for the clinician’s understanding of health status and the individual’s perceived stigma and ability to accurately assess the patient’s risk of acquiring or transmitting STIs. Therefore, clinicians should stress the confidential nature of discussions about sexual activities and maintain a nonjudgmental attitude to encourage patients to disclose all sexual behaviors.

For clinicians who are uncomfortable discussing sexual behaviors and sexually transmitted infection (STI) transmission risk, training may help increase their comfort level and assist them in developing a nonjudgmental approach to educating patients about the importance of STI screening. The New York State (NYS) Department of Health (NYSDOH) Clinical Education Initiative Line (866-637-2342) enables clinicians in NYS to discuss post-exposure prophylaxis (PEP), pre-exposure prophylaxis (PrEP), HIV, hepatitis C virus (HCV), and STI management with a specialist, and the New York City STD/HIV Prevention Training Center provides HIV-related educational resources and training for providers. The Centers for Disease Control and Prevention’s Guide to Taking a Sexual History offers parameters for discussing sexual health issues with patients.

References

Bernstein KT, Liu KL, Begier EM, et al. Same-sex attraction disclosure to health care providers among New York City men who have sex with men: implications for HIV testing approaches. Arch Intern Med 2008;168(13):1458-64. [PMID: 18625927]

Center of Excellence for Transgender Health (CETH). Guidelines for the Primary and Gender-Affirming Care of Transgender and Gender Nonbinary People. 2016 Jun 17. http://transhealth.ucsf.edu/protocols [accessed 2018 Mar 2]

Pathela P, Hajat A, Schillinger J, et al. Discordance between sexual behavior and self-reported sexual identity: a population-based survey of New York City men. Ann Intern Med 2006;145(6):416-25. [PMID: 16983129]

Syphilis and Neurosyphilis: Presentation, Diagnosis, and Reporting

Sexually Transmitted Infections Guidelines Committee; February 2018, updated July 2021

RECOMMENDATIONS

Presentation and Diagnosis As part of the initial and then annual comprehensive physical examination for patients with HIV, clinicians should examine all skin and mucosal surfaces for lesions, especially less-visible areas, such as the anus, cervix, vagina, vulva, urethra, oropharynx, and under the foreskin in uncircumcised males. (A3) Clinicians should perform a neurologic review of systems, including ophthalmologic and otic, for all patients with HIV who are diagnosed with syphilis and follow up with further neurologic evaluation, as recommended in Table 4: Recommended Treatment and Follow-Up of Syphilis in Patients with HIV. (A2) Clinicians should ensure that two-stage syphilis testing is performed by the laboratory if the initial screen is reactive. (A1) Clinicians should perform a nontreponemal test, such as the rapid plasma reagin (RPR) or venereal disease research laboratory (VDRL) test, for repeat screening in patients who have a history of syphilis infection. (A1) Clinicians should perform gonorrheal and chlamydial testing for any patient with HIV who is diagnosed with syphilis infection. (A2) Clinicians should include neurosyphilis in the differential diagnosis of all patients with HIV who present with neurologic, ophthalmologic, otic, or neuropsychiatric signs or symptoms. (A2) Clinicians should perform a lumbar puncture in patients with HIV who have syphilis or a history of syphilis when patients present with the following: Neurologic or neuropsychiatric signs or symptoms that are not explained by another etiology. (A2) Note: Patients with isolated otic symptoms or ocular symptoms with accompanying physical exam findings consistent with ocular syphilis do not require a lumbar puncture because treatment for neurosyphilis is indicated even if cerebrospinal fluid is normal. Evidence of treatment failure (see Treatment Failure in the Treatment and Follow-Up section of this guideline). (A2) Evidence of active tertiary syphilis (aortitis, gummas). (A3) Reporting: New York State Requirement Clinicians must report all suspected or confirmed syphilis diagnoses to the local health department of the area where the patient resides according to NYS requirements. See NYSDOH Communicable Disease Reporting and NYC Health Reporting Diseases and Conditions.

Presentation

Syphilis is classified into four stages: primary, secondary, latent, and tertiary. Syphilis transmission occurs during the primary or secondary clinical stage of infection. Latent syphilis, by definition, has no associated symptoms or signs. Because the chancres of primary syphilis are usually painless and may go unnoticed by the patient, it is important that the clinician examine all skin and mucosal surfaces of patients with HIV during the annual comprehensive physical examination. However, most cases of syphilis are diagnosed in the latent phase [Ratnam 2005] and thus lack all signs or symptoms at the time of presentation.

Most patients with syphilis and HIV coinfection present with the signs and symptoms typical of syphilis in patients without HIV [Larsen et al. 1995]. However, published case reports have described atypical syphilis in the setting of HIV coinfection [Workowski et al. 2015]. Differences in Clinical Presentation of Syphilis in Patients With and Without HIV summarizes the usual clinical presentation of symptomatic syphilis and the atypical clinical presentation of syphilis in individuals with HIV coinfection (see also: Photographic Examples of Secondary Syphilis in Patients With HIV). The lesions of primary syphilis usually develop after an incubation period of 10 to 90 days (usually 3 weeks). Primary lesions usually last 3 weeks and resolve without treatment. The onset of secondary syphilis occurs from 2 weeks to 6 months (usually 4 weeks) after the resolution of the primary stage. Secondary symptoms usually last 4 weeks and, like primary symptoms, resolve without treatment. Latent syphilis may persist for up to 50 years after infection. Latent infection is divided into early latent (<1 year since infection) and late latent (≥1 year after infection). During early latent infection, relapse of secondary syphilis with subsequent transmission to sexual partners is possible [Golden et al. 2003]. Tertiary syphilis refers to clinical manifestations occurring after the latent stage (range, 2-50 years after latency). Typically, tertiary syphilis is divided by organ system involvement into gummatous, cardiovascular, and neurologic syphilis. Patients with syphilis who have signs or symptoms of the disease are classified into the appropriate stage based on the physical examination. 

Syphilis is known to have a wide variety of clinical manifestations, including the following:

• It may mimic other infections, such as herpes, fungal rash, or noninfectious dermatologic conditions, such as contact dermatitis or psoriasis.
• Syphilitic gumma may present as a focal mass lesion.
• Ocular syphilis may develop at any part of the eye during any stage of syphilis infection (including primary or secondary syphilis) and may cause permanent blindness without prompt treatment; manifestations are bilateral in up to 50% of cases [Spoor et al. 1983; Dombrowski et al. 2015; Mathew et al. 2014; Kiss et al. 2005].
• Otosyphilis may develop at any stage of syphilis infection, causing tinnitus, vertigo, and permanent hearing loss even after treatment [Gleich et al. 1992; Dobbin and Perkins 1983; Steckelberg and McDonald 1984; Wong et al. 1977; Hendershot 1973].
• Syphilitic hepatitis is a reversible manifestation of secondary syphilis [Manavi et al. 2012; Crum-Cianflone et al. 2009; Feher et al. 1975; Haburchak and Davidson 1978].
• Frequency of clinical relapse or progression after syphilis treatment may be higher in the setting of HIV.

Syphilis should be included as part of the differential diagnosis for patients presenting with oral, genital, cervical, or anal lesions; rash; eye disease or vision complaints; aortitis; or neurologic disease (see the Presentation and Diagnosis of Neurosyphilis section, below, for information about signs, symptoms, and diagnosis of neurosyphilis).

Diagnosis

Syphilis is diagnosed primarily through the use of laboratory testing. Findings from the patient’s medical history and physical examination are used to determine stage of disease. The overwhelming majority of cases are identified through the use of syphilis serology (antibody) tests. Lesion-based testing may identify the causative organism when a lesion is present (see Table 2: Screening and Diagnostic Tests for Syphilis, below). Definitive diagnosis of syphilis is made either serologically or, if available, by direct identification of the causative organism.              

Syphilis serologies are complex and require two-stage testing as described in Figures 3 and 4, below. Note the following features of syphilis serologies relevant to diagnosis:

• Antibody requires time to develop, and all serologic tests may be negative very early in infection, even shortly after a chancre has appeared. Lesion-based testing with darkfield microscopy or presumptive diagnosis on the basis of lesion appearance may be the only means of diagnosis in these situations. (For more information, see Table 2: Screening and Diagnostic Tests for Syphilis, below.)
• RPR tests performed during the secondary stage may appear falsely nonreactive when antibody levels are exceedingly high, a phenomenon known as the prozone effect. In this circumstance, the specimen should be diluted and retested if suspicion for syphilis is high.

Although there are limited data available specifically regarding the rate of syphilis coinfection identified in patients with gonococcal or chlamydial infections, surveillance reports identify high rates of gonococcal or chlamydial infections and syphilis among men who have sex with men. Because exposure resulting in the acquisition of one sexually transmitted infection (STI) has long been recognized to be a risk for other STIs and HIV infection, this Committee recommends testing for gonorrhea and chlamydia when a patient is diagnosed with a new syphilis infection [CDC 2017; Bala et al. 2011; Foschi et al. 2014].

Table 2: Screening and Diagnostic Tests for Syphilis
Serologic Tests	Description [a]
Nontreponemal: Rapid plasma reagin (RPR) Venereal disease research laboratory (VDRL)	Nonspecific quantitative tests May be negative in 15% to 25% of cases presenting with primary chancre [Larsen et al. 1995; CDC 2013] Near 100% sensitivity during secondary syphilis [Larsen et al. 1995; CDC 2013] May be positive in the setting of medical conditions other than syphilis, including HIV infection; collagen vascular diseases; narcotic drug use; advanced age; pregnancy; chronic liver disease; some viral infections, such as Epstein-Barr virus; and other chronic inflammatory conditions
Treponemal: Fluorescent treponemal antibody absorbed (FTA-Abs) pallidum particle agglutination (TP-PA) pallidum IgG + IgM enzyme-linked immunosorbent assay (ELISA) Treponemal enzyme immunoassay (EIA)/chemiluminescence immunoassay (CIA) [b]	Measure antibody to surface protein of pallidum (antibodies will persist; they do not afford protective immunity and cannot be used to diagnose subsequent episodes or to monitor response to therapy) More specific than nontreponemal tests Become reactive approximately 7 to 10 days after the appearance of the chancre Rarely produce false-positive results [CDC 2011; Hernandez-Aguado et al. 1998; Park et al. 2011]
Lesion-Based Tests [c]	Description [a]
Direct fluorescent antibody test (DFA)	Performed on lesion exudate or tissue specimen
Darkfield microscopy	Performed on exudate from an ulcer base or a mucocutaneous lesion
Silver stain	Performed on biopsy specimens of suspicious lesions, such as palmar macular rash or gummatous lesions
Polymerase chain reaction (PCR)	Performed on specimens of lesions
For more information about screening and diagnostic tests for syphilis, see Table 2: Screening and Diagnostic Tests for Syphilis. Some clinical laboratories and blood banks use the pallidum IgG + IgM ELISA or treponemal CIA/EIA assay first, followed by nontreponemal tests. Lesion-based testing is used when serologic testing is nonreactive in the presence of a lesion.

Traditionally, the standard screening algorithm for syphilis has started with a nontreponemal screening test (e.g., RPR or VDRL), followed by a confirmatory test for treponemal antigen (e.g., T. pallidum particle agglutination [TP-PA], fluorescent treponemal antibody absorbed [FTA-Abs], or enzyme immunoassay [EIA]/ chemiluminescence immunoassay [CIA]). Figure 3, below, details the standard screening algorithm for syphilis.

Some laboratories use a reverse-sequence screening algorithm with automated treponemal EIA or CIA as the initial screening test, followed by confirmation with the nontreponemal RPR (Figure 4: Alternative, Reverse Algorithm for Syphilis Screening and Diagnosis). When discordant results are provided by laboratories using the alternative algorithm (i.e., reactive EIA/CIA with a nonreactive RPR), the Centers for Disease Control and Prevention recommend that a second different treponemal test (ideally based on different antigens than the first test) be performed to confirm the results of the first nonspecific antibody result. Clinicians should request information regarding the screening algorithm of their laboratory and be familiar with the testing sequence used. Table 2: Interpretation of Results of Reverse-Sequence Testing for Syphilis, below, provides recommendations for interpreting results when the reverse algorithm is used.

Difficulties with interpreting syphilis serologies: Serologic test results are negative in patients with incubating syphilis, and the sensitivity of serologic tests is approximately 80% during the early primary stage of syphilis (i.e., within the first 10 days after the lesion appears). All syphilis serologic tests may be falsely negative early in infection, including at the initial appearance of the syphilitic chancre. Serum samples containing large amounts of nontreponemal reagin rarely, but occasionally, demonstrate a false-negative reaction, known as a prozone reaction [Jurado et al. 1993]. When there is clinical suspicion of syphilis but the nontreponemal test result is negative, clinicians should order laboratory dilution and retesting of the sample. Treponemal tests rarely produce false-negative results; however, if clinical suspicion is high, an alternative treponemal test should be considered. See Table 1: Sensitivity of Serologic Tests in Untreated Syphilis for the sensitivity of tests during various stages of untreated syphilis.

Table 3: Interpretation of Results of Reverse-Sequence Testing for Syphilis [CDC 2011; AIDSinfo 2017]
T. pallidum EIA/CIA Test	RPR Test	Second Treponemal-Specific Test (e.g., TP-PA)	Interpretation and Action
Positive	Positive	Not necessary	Current or past syphilis (treated or untreated) Assess for treatment
Positive	Negative	Positive	Current or past syphilis (treated or untreated) Assess for treatment
Negative	Not performed in the algorithm	Not performed in the algorithm	No syphilis Consider alternative treponemal test if clinical suspicion is high
Positive	Negative	Negative	No syphilis Consider alternative treponemal test if clinical suspicion is high
CIA, chemiluminescence immunoassay; EIA, enzyme immunoassay; RPR, rapid plasma reagin; TP-PA, T. pallidum particle agglutination.

The persistence of syphilis antibody complicates the diagnosis of a new infection in those with a history of prior syphilis. With the exception of 15% to 25% of individuals who receive treatment during primary infection [Romanowski et al. 1991], most individuals with a history of syphilis infection will experience lifelong positivity for FTA-Abs, TP-PA, enzyme-linked immunosorbent assay, and EIA. Some individuals previously treated for syphilis will continue to have a low-positive serum RPR or VDRL (i.e., “serofast” syphilis). A 4-fold or greater increase in serum RPR or VDRL may indicate treatment failure or a reinfection with syphilis. Use of the same nontreponemal reagin test and, ideally, the same laboratory when performing repeat screening and monitoring response to treatment will allow for accurate comparison of titers and reduce variations in reagin levels across assays.

Presentation and Diagnosis of Neurosyphilis

Central nervous system involvement can occur at any stage of syphilis. Neurologic signs and symptoms, which may include, but are not limited to, meningitis or ophthalmologic or otologic abnormalities, warrant examination of the cerebrospinal fluid (CSF), regardless of the stage of syphilis. Patients may also present with neuropsychiatric signs or symptoms, such as a change in cognition or behavior [Mitsonis et al. 2008]. Any evidence of tertiary syphilis or treatment failure is also an indication for CSF examination. Diagnosis of neurosyphilis requires examination of the CSF; the diagnosis is definitive when a CSF VDRL is reactive, unless the CSF is contaminated with blood. When a CSF VDRL test is nonreactive, other CSF abnormalities may be consistent with a diagnosis of neurosyphilis. Both CSF pleocytosis and elevated CSF protein have been associated with neurosyphilis. However, these nonspecific CSF abnormalities may also be found in patients with HIV because of the HIV infection itself or other HIV-associated conditions, making the results of CSF VDRL-negative examinations difficult to interpret.

Detection of the causative organism in the CSF in early syphilis is not more common in patients with HIV, does not correlate with subsequent development of neurosyphilis, and is not linked to serologically defined treatment failure. For these reasons, most experts do not recommend routine CSF examination for patients with HIV whose early syphilis does not present with neurologic symptoms. However, some clinicians would favor treating more aggressively (with a regimen recommended for late latent syphilis) upon diagnosis to prevent future complications.

One prospective study that analyzed the CSF test results of 326 patients with syphilis found that patients with HIV and syphilis who had RPR serum reagin levels ≥1:32 or who had CD4 counts ≤350 cells/mm³ were more likely to have neurosyphilis [Marra et al. 2004]. However, CSF examination in the absence of neurological signs or symptoms has not been shown to improve clinical outcomes [Workowski and Bolan 2015].

Reporting: New York State

Requirements: Prompt reporting of suspected or confirmed syphilis is mandated under the NYS Sanitary Code (10NYCRR 2.10). In NYS, syphilis cases should be reported immediately to the local health department as follows:

• By telephone:
  • Any positive primary or secondary stage disease.
  • Any positive prenatal or delivery test, regardless of serum reagin level.
  • Any nontreponemal test ≥1:16.

For more information about disease reporting in NYS:  Contact the local health department where the patient resides or the NYSDOH Bureau of Communicable Disease Control at 518-473-4439.

Partner notification: The local health department may contact the patient for epidemiological investigation or to offer assistance with partner notification.

Clinicians can contact local health departments to obtain previously reported nontreponemal and treponemal test results and treatment histories. See STD Clinics in NYS for contact information for clinics in each county.

Reporting: New York City 

Requirements: NYC’s Health Code Article 11 requires prompt reporting of all cases of syphilis (see NYC DOHMH Diseases and Conditions Reporting). In NYC, syphilis cases can be reported using the Universal Reporting Form, which can be submitted as follows:

• Online: via NYCMED
• Fax: call 866-692-3641 for the appropriate fax number
• Mail: New York City Department of Health and Mental Hygiene (NYC DOHMH), 42-09 28th Street, CN-22, Long Island City, NY 11101.

For more information: See How to Report Diseases, Events, and Conditions to the New York City Health Department for more information.

Partner notification: The NYC DOHMH may contact the patient for epidemiological investigation or to offer assistance with partner notification. 

References

AIDSinfo. Guidelines for Prevention and Treatment of Opportunistic Infections in HIV-Infected Adults and Adolescents. 2017 Apr 12. https://aidsinfo.nih.gov/guidelines/html/4/adult-and-adolescent-oi-prevention-and-treatment-guidelines/0 [accessed 2018 Feb 13]

Bala M, Mullick JB, Muralidhar S, et al. Gonorrhoea & its co-infection with other ulcerative, non-ulcerative sexually transmitted & HIV infection in a Regional STD Centre. Indian J Med Res 2011;133:346-9. [PMID: 21441694]

CDC. 2016 Sexually Trasmitted Diseases Surveillance: STDs in Men Who Have Sex With Men. 2017 Aug 18. https://www.cdc.gov/std/stats16/msm.htm [accessed 2018 Feb 13]

CDC. Discordant results from reverse sequence syphilis screening–five laboratories, United States, 2006-2010. MMWR Morb Mortal Wkly Rep 2011;60(5):133-7. [PMID: 21307823]

CDC. Self-Study STD Modules for Clinicians–Syphilis: Patient Management/Treatment. 2013 Aug. https://www.std.uw.edu/custom/self-study [accessed 2018 Feb 13]

Crum-Cianflone N, Weekes J, Bavaro M. Syphilitic hepatitis among HIV-infected patients. Int J STD AIDS 2009;20(4):278-84. [PMID: 19304979]

Dobbin JM, Perkins JH. Otosyphilis and hearing loss: response to penicillin and steroid therapy. Laryngoscope 1983;93(12):1540-3. [PMID: 6645754]

Dombrowski JC, Pedersen R, Marra CM, et al. Prevalence Estimates of Complicated Syphilis. Sex Transm Dis 2015;42(12):702-4. [PMID: 26562700]

Feher J, Somogyi T, Timmer M, et al. Early syphilitic hepatitis. Lancet 1975;2(7941):896-9. [PMID: 53374]

Foschi C, Marangoni A, D’Antuono A, et al. Prevalence and predictors of Lymphogranuloma venereum in a high risk population attending a STD outpatients clinic in Italy. BMC Res Notes 2014;7:225. [PMID: 24716676]

Gleich LL, Linstrom CJ, Kimmelman CP. Otosyphilis: a diagnostic and therapeutic dilemma. Laryngoscope 1992;102(11):1255-9. [PMID: 1307698]

Golden MR, Marra CM, Holmes KK. Update on syphilis: resurgence of an old problem. JAMA 2003;290(11):1510-4. [PMID: 13129993]

Haburchak DR, Davidson H. Anorectal lesions and syphilitic hepatitis. West J Med 1978;128(1):64-7. [PMID: 625974]

Hendershot EL. Luetic deafness. Laryngoscope 1973;83(6):865-70. [PMID: 4197085]

Hernandez-Aguado I, Bolumar F, Moreno R, et al. False-positive tests for syphilis associated with human immunodeficiency virus and hepatitis B virus infection among intravenous drug abusers. Valencian Study Group on HIV Epidemiology. Eur J Clin Microbiol Infect Dis 1998;17(11):784-7. [PMID: 9923520]

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Kiss S, Damico FM, Young LH. Ocular manifestations and treatment of syphilis. Semin Ophthalmol 2005;20(3):161-7. [PMID: 16282150]

Larsen SA, Steiner BM, Rudolph AH. Laboratory diagnosis and interpretation of tests for syphilis. Clin Microbiol Rev 1995;8(1):1-21. [PMID: 7704889]

Manavi K, Dhasmana D, Cramb R. Prevalence of hepatitis in early syphilis among an HIV cohort. Int J STD AIDS 2012;23(8):e4-6. [PMID: 22930309]

Marra CM, Maxwell CL, Smith SL, et al. Cerebrospinal fluid abnormalities in patients with syphilis: association with clinical and laboratory features. J Infect Dis 2004;189(3):369-76. [PMID: 14745693]

Mathew RG, Goh BT, Westcott MC. British Ocular Syphilis Study (BOSS): 2-year national surveillance study of intraocular inflammation secondary to ocular syphilis. Invest Ophthalmol Vis Sci 2014;55(8):5394-400. [PMID: 24925878]

Mitsonis CH, Kararizou E, Dimopoulos N, et al. Incidence and clinical presentation of neurosyphilis: a retrospective study of 81 cases. Int J Neurosci 2008;118(9):1251-7. [PMID: 18698508]

Park IU, Chow JM, Bolan G, et al. Screening for syphilis with the treponemal immunoassay: analysis of discordant serology results and implications for clinical management. J Infect Dis 2011;204(9):1297-304. [PMID: 21930610]

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Spoor TC, Wynn P, Hartel WC, et al. Ocular syphilis. Acute and chronic. J Clin Neuroophthalmol 1983;3(3):197-203. [PMID: 6226720]

Steckelberg JM, McDonald TJ. Otologic involvement in late syphilis. Laryngoscope 1984;94(6):753-7. [PMID: 6727512]

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Differences in Clinical Presentation of Syphilis in Patients With and Without HIV

Sexually Transmitted Infections Guidelines Committee, February 2018

Table B1: Differences in Clinical Presentation of Syphilis in Patients With and Without HIV [see references below]
Stage of Syphilis	Reported in All Patients	Reported in Patients with HIV
Primary	Develops 10-90 days (usually 3 weeks) after exposure Single chancre: painless, indurated ulcer with a clean base and smooth borders Chancre persists 1-5 weeks (average 3 weeks) and heals spontaneously, regardless of treatment Painless, rubbery lymphadenopathy in some cases	Multiple chancres Chancres that are larger, deeper, and resolve more slowly Atypical chancres appearing as abrasions or fissures Reports of ocular syphilis, mainly uveitis (found in 10% of patients with a positive CSF VDRL in one study); patients should receive treatment for neurosyphilis
Secondary	Signs and symptoms occur 2 weeks to 6 months (usually 4 weeks) after resolution of primary syphilis Low-grade fever, adenopathy, headache, malaise, and rash may occur Maculopapular rash involving palms and soles, mucous patches in the mouth, condylomata, and patchy alopecia (persists 2-6 weeks and heals spontaneously) are common Uveitis, iritis, hepatitis, and nephrotic syndrome may occur	Coincident chancres with signs of secondary syphilis Duration of rash may be slightly longer, and rash may be more widespread Atypical skin rashes, including papular, nodular, and ulceronodular (lues maligna) Reports of ocular syphilis, mainly uveitis (found in 10% of patients with a positive CSF VDRL in one study); patients should receive treatment for neurosyphilis Retinitis, papillitis, and cranial nerve abnormalities II, III, or V in association with syphilitic meningitis; patients should receive treatment for neurosyphilis
Latent	Infection can be detected by serologic testing but otherwise lacks evidence of disease Can persist up to 50 years past initial infection Early latent syphilis: latent syphilis acquired within the preceding year Diagnosis of early latent syphilis can be made if any of the following occur in the year preceding the evaluation: Seroconversion was documented (i.e., documented nonreactive nontreponemal test within preceding 12 months) 4-fold increase in nontreponemal serum reagin since the last adequately treated infection A history of unequivocal symptoms of primary or secondary syphilis Sex partner documented to have primary, secondary, or early latent syphilis Reports of ocular syphilis, mainly uveitis (found in 10% of patients with a positive CSF VDRL in one study); patients should receive treatment for neurosyphilis All other asymptomatic cases are either late latent syphilis or latent syphilis of unknown duration
Tertiary
Gummatous (late benign syphilis)	Occurs 1 to >40 years (average 4-10 years) after initial infection Gumma-indolent lesion that consists of a marked granulomatous response on histopathology Occurs in any organ system Rare in the antibiotic era	Several reports of gummas One case of rapid progression to gumma within several months of a chancre Located in multiple organ systems including the brain
Cardiovascular	Occurs after 15-30 years of latency Pathologic lesion is endarteritis obliterans of vasa vasorum of the aorta May result in aneurysms, coronary artery stenosis, or aortic regurgitation Rare in the antibiotic era	Rare cases of rapidly developing aortitis
Neurologic	Asymptomatic or symptomatic meningitis (early after infection) Meningovascular syphilis presenting as cerebrovascular accident Parenchymatous syphilis presenting as general paresis (>20 years after initial infection) or tabes dorsalis (15-20 years after initial infection)	Numerous case reports of neurosyphilis Progression to neurosyphilis despite treatment of early syphilis Reports of rapid progression to neurosyphilis without long latency Cases have occurred in patients with both normal and low CD4 counts Clinical features include asymptomatic disease, meningitis, cranial nerve deficits, optic neuritis, myelitis, stroke, and cerebral gummas Reports of ocular syphilis, mainly uveitis during secondary syphilis (found in 10% of patients with a positive CSF VDRL in one study); patients should receive treatment for neurosyphilis Retinitis, papillitis, and cranial nerve abnormalities II, III, or V in association with syphilitic meningitis during secondary syphilis; patients should receive treatment for neurosyphilis
CSF, cerebrospinal fluid; VDRL, venereal disease research laboratory.

References

CDC. Clinical advisory: ocular syphilis in the United States. 2016 Nov 3. https://www.cdc.gov/std/syphilis/clinicaladvisoryos2015.htm [accessed 2018 Feb 13]

Flood JM, Weinstock HS, Guroy ME, et al. Neurosyphilis during the AIDS epidemic, San Francisco, 1985-1992. J Infect Dis 1998;177(4):931-40. [PMID: 9534965]

Garcia-Silva J, Velasco-Benito JA, Pena-Penabad C. Primary syphilis with multiple chancres and porphyria cutanea tarda in an HIV-infected patient. Dermatology 1994;188(2):163-5. [PMID: 7907894]

Hay PE, Tam FW, Kitchen VS, et al. Gummatous lesions in men infected with human immunodeficiency virus and syphilis. Genitourin Med 1990;66(5):374-9. [PMID: 2245985]

Horowitz HW, Valsamis MP, Wicher V, et al. Brief report: cerebral syphilitic gumma confirmed by the polymerase chain reaction in a man with human immunodeficiency virus infection. N Engl J Med 1994;331(22):1488-91. [PMID: 7969298]

Katz DA, Berger JR, Duncan RC. Neurosyphilis. A comparative study of the effects of infection with human immunodeficiency virus. Arch Neurol 1993;50(3):243-9. [PMID: 8442701]

Kearns G, Pogrel MA, Honda G. Intraoral tertiary syphilis (gumma) in a human immunodeficiency virus-positive man: a case report. J Oral Maxillofac Surg 1993;51(1):85-8. [PMID: 8419580]

Kiss S, Damico FM, Young LH. Ocular manifestations and treatment of syphilis. Semin Ophthalmol 2005;20(3):161-7. [PMID: 16282150]

Mathew RG, Goh BT, Westcott MC. British Ocular Syphilis Study (BOSS): 2-year national surveillance study of intraocular inflammation secondary to ocular syphilis. Invest Ophthalmol Vis Sci 2014;55(8):5394-400. [PMID: 24925878]

McLeish WM, Pulido JS, Holland S, et al. The ocular manifestations of syphilis in the human immunodeficiency virus type 1-infected host. Ophthalmology 1990;97(2):196-203. [PMID: 2326008]

Olmos JM, Fernandez-Ayala M, Gutierrez JA, et al. Superior vena cava syndrome secondary to syphilitic aneurysm of the ascending aorta in a human immunodeficiency virus-infected patient. Clin Infect Dis 1998;27(5):1331-2. [PMID: 9827300]

Rademacher SE, Radolf JD. Prominent osseous and unusual dermatologic manifestations of early syphilis in two patients with discordant serological statuses for human immunodeficiency virus infection. Clin Infect Dis 1996;23(3):462-7. [PMID: 8879765]

Rolfs RT, Joesoef MR, Hendershot EF, et al. A randomized trial of enhanced therapy for early syphilis in patients with and without human immunodeficiency virus infection. The Syphilis and HIV Study Group. N Engl J Med 1997;337(5):307-14. [PMID: 9235493]

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Shalaby IA, Dunn JP, Semba RD, et al. Syphilitic uveitis in human immunodeficiency virus-infected patients. Arch Ophthalmol 1997;115(4):469-73. [PMID: 9109754]

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Spoor TC, Wynn P, Hartel WC, et al. Ocular syphilis. Acute and chronic. J Clin Neuroophthalmol 1983;3(3):197-203. [PMID: 6226720]

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Photographic Examples of Secondary Syphilis in Patients With HIV

Sexually Transmitted Infections Guidelines Committee, February 2018

(From the slide collection of The Ronald O. Perelman Department of Dermatology, New York University School of Medicine.)

Malignant syphilis (lues maligna) or ulceronodular secondary syphilis

Patient with HIV

Nodular secondary syphilis

Patient with HIV

Granulomatous papules and nodules

Face of a patient with HIV

Diffuse roseola-like eruption (roseola syphilitica)

Trunk, limbs, and acral surfaces in a patient with HIV

Dull-red to copper-colored macules, papules, or plaques

Seen on the palms in secondary syphilis

Palmar plaques with a collarette of scale (collarette of Biett)

Dull-red to copper-colored macules, papules, or plaques

Seen on the soles in secondary syphilis

Multiple discrete flat papules of lenticular syphilis

Annular and figurate plaques

Mucous patches are superficial mucosal erosions

Seen in secondary syphilis. They can be found on any mucosal surface and are highly infectious.

Condyloma lata

More common in the anogenital area. This example is on the tongue. The thin macerated plaques can resemble flat or genital warts. These are also highly infectious.

Treatment and Follow-Up

Sexually Transmitted Infections Guidelines Committee, February 2018

RECOMMENDATIONS

Treatment Because of the possibility of false-negative test results in primary syphilis, clinicians should presumptively treat patients at risk of syphilis who present with a lesion typical of a syphilitic chancre. (A3) Clinicians should use long-acting benzathine penicillin G as the recommended treatment for syphilis in patients with HIV. (A2) See Table 3: Recommendations for Treatment and Follow-Up of Syphilis in Patients with HIV for dose and frequency according to stage of syphilis. Clinicians should use only penicillin to treat all stages of syphilis in pregnant patients. (A2) Clinicians should obtain baseline and monthly assessment of serum nontreponemal reagin levels when treating syphilis in pregnant patients with HIV if the risk of syphilis reinfection is high. (A3) Treatment in Penicillin-Allergic Patients Clinicians should administer desensitization therapy followed by penicillin therapy to treat penicillin-allergic patients who have neurosyphilis, other forms of tertiary syphilis, syphilis in pregnancy, or syphilis that cannot be treated by an alternative regimen. (A2) Clinicians should administer desensitization therapy for patients with HIV, followed by penicillin therapy, rather than attempt alternate therapies if adherence to therapy or close follow-up cannot be ensured. (A3) Clinicians should not prescribe azithromycin to treat syphilis in patients with HIV. (A2) Jarisch-Herxheimer Reaction In women treated for syphilis infection during the second half of their pregnancy, clinicians should Obtain a fetal sonogram to evaluate for congenital syphilis. (A2) Advise women who experience fever, contractions, or a decrease in fetal movements to seek immediate obstetric care. (A2) Treatment Failure Clinicians should perform CSF examination for patients who experience treatment failure, and: Initiate parenteral therapy using a recommended penicillin regimen for late latent syphilis if CSF test results are negative. (A2) Treat using a recommended penicillin regimen for neurosyphilis if CSF test results are positive. (A2)

Detailed treatment and follow-up recommendations for syphilis in patients with HIV are presented in Table 4: Recommendations for Treatment and Follow-Up of Syphilis in Patients with HIV, below. Penicillin G is the drug of choice, and recommendations for treatment vary by stage. Recommended penicillin G regimens are the same for patients with HIV as for patients who do not have HIV.

KEY POINTS

To avoid use of the incorrect pharmaceutical preparation of penicillin, clinicians should ensure that long-acting benzathine penicillin G (i.e., Bicillin LA and not Bicillin CR) is ordered. Treatment failure in a person with HIV warrants cerebrospinal fluid (CSF) examination and treatment based on test results.

Patients with HIV who are diagnosed with syphilis should be monitored closely. The frequency of follow-up varies by stage (see Table 4: Recommended Treatment and Follow-Up of Syphilis in Patients with HIV, below). Follow-up should include a physical and a neurologic examination and repeat serologic testing. Treatment failure is defined as the persistence of symptoms or the development of new clinical signs or symptoms, a 4-fold (2 reagin level) increase in nontreponemal serology (e.g., rapid plasma reagin [RPR] 1:4 increases to 1:16), or a failure of nontreponemal serology to decline 4-fold (2 reagin levels) within 12 to 24 months of treatment (nontreponemal serology should decline more rapidly in patients with primary syphilis) [Workowski and Bolan 2015]. Treatment failure in a person with HIV warrants CSF examination and treatment based on results; consultation with a care provider experienced in sexually transmitted infections (STIs) is indicated. The New York State (NYS) Department of Health (NYSDOH) Clinical Education Initiative Line (866-637-2342) enables clinicians in NYS to discuss post-exposure prophylaxis (PEP), pre-exposure prophylaxis (PrEP), HIV, hepatitis C virus (HCV), and STI management with a specialist, and the NYC STD/HIV Prevention Training Center provides HIV-related educational resources and training for providers. For additional information about management of treatment failure, see the Treatment Failure section, below.

Table 4: Recommended Treatment and Follow-Up of Syphilis in Patients with HIV [a] Download PDF
Stage	Treatment [b] (AII)	Follow-Up Intervals (AIII)	Comments
Primary, secondary	2.4 million units IM benzathine penicillin × 1 dose	3, 6, 9, 12, 24 months post-treatment	CSF examination recommended in the presence of neurologic, ophthalmologic, or otic changes or evidence of treatment failure [c]
Early latent	2.4 million units IM benzathine penicillin × 1 dose	6, 12, 18, 24 months post-treatment	CSF examination recommended in the presence of neurologic, ophthalmologic, or otic changes or evidence of treatment failure [c]
Late latent or unknown duration	2.4 million units IM benzathine penicillin per week × 3 weeks	6, 12, 18, 24 months post-treatment	CSF examination recommended in the presence of neurologic, ophthalmologic, or otic changes or evidence of treatment failure [c]
Tertiary gummatous	2.4 million units IM benzathine penicillin per week × 3 weeks	6, 12, 18, 24 months post-treatment [d]	CSF examination recommended Some experts recommend parenteral therapy as for neurosyphilis
Tertiary cardiovascular	2.4 million units IM benzathine penicillin per week × 3 weeks	6, 12, 18, 24 months post-treatment [d]	CSF examination recommended Some experts recommend parenteral therapy as for neurosyphilis
Neurosyphilis	Aqueous crystalline penicillin G 18 to24 million units IV daily for 10 to 14 days	3, 6, 9, 12, 24 months [e] post-treatment; repeat CSF examination every 6 months until CSF cell count is normal	CSF examination recommended in the presence of neurologic, ophthalmologic, or otic changes or evidence of treatment failure Some experts recommend 2.4 million units IM benzathine after parenteral penicillin to have total duration of therapy equal to that of late latent syphilis CSF abnormalities (elevated total protein and/or positive CSF VDRL) may persist for prolonged periods
Abbreviations: CSF, cerebrospinal fluid; IM, intramuscular; IV, intravenous; VDRL, venereal disease research laboratory. Notes: Adapted from Centers for Disease Control and Prevention [Workowski and Bolan 2015] unless otherwise noted. The efficacy of non-penicillin regimens in patients with HIV is unknown. Penicillin-allergic patients should be desensitized if possible. Close clinical and serologic follow-up is necessary when non-penicillin regimens are used to treat syphilis in patients with HIV. CSF examination yielding pleocytosis, increased total protein, or positive VDRL may be consistent with neurosyphilis. There are no published data to inform a recommendation regarding serologic follow-up in patients treated for tertiary syphilis. Because tertiary syphilis is a late complication of syphilis, occurring after the first year of infection, this committee recommends providers utilize the serologic follow-up schedule for late, latent syphilis (6, 12, 18, 24 month post-treatment). There are limited data addressing serologic follow-up of patients treated for neurosyphilis. Because neurosyphilis may occur during all stages of syphilis, this committee recommends serologic follow-up for HIV co-infected patients treated for neurosyphilis at 3, 6, 9, 12, and 24 months post-treatment.

Treatment of Syphilis in Penicillin-Allergic Patients with HIV

Penicillin is the recommended treatment for syphilis. Alternate treatment options for penicillin-allergic patients with HIV have not been well studied. Non-penicillin therapies should be used with caution. Such regimens require close clinical and serologic follow-up to identify treatment failure or relapse. See Centers for Disease Control and Prevention’s Management of Persons Who Have a History of Penicillin Allergy for information regarding penicillin desensitization.

Doxycycline (100 mg by mouth twice per day for 14 days) may be effective for treatment of early syphilis [AIDSinfo 2017]. If treatment failure occurs with doxycycline, patients should undergo desensitization to penicillin and receive penicillin treatment. Resistance and treatment failures have been documented with the use of azithromycin (2 g by mouth in a single dose) for early syphilis; this agent should be used with caution and only when treatment with penicillin or doxycycline is not feasible [AIDSinfo 2017]. Azithromycin should not be used in patients with HIV [Workowski and Bolan 2015]. Azithromycin-resistant strains may be more common within the population of men who have sex with men [CDC 2010], and the presence of azithromycin-resistant syphilis during pregnancy increases the risk of congenital syphilis [Zhou et al. 2007; Moline and Smith 2016; Marra 2015, 2016; Dowell et al. 1992; Spornraft-Ragaller et al. 2011; Smith et al. 2004; Liang et al. 2016]. Small case series have documented use of ceftriaxone for treatment of latent and neurologic syphilis, but failures have been reported. Penicillin should be used when at all possible.

Jarisch-Herxheimer Reaction

Patients should receive education about the possibility of adverse reactions to syphilis treatment, including the Jarisch-Herxheimer reaction because this is more common in patients with HIV [Rolfs et al. 1997] and may be misinterpreted as an allergic reaction to penicillin. The Jarisch-Herxheimer reaction, which is caused by the immunologic response to the destruction of the spirochete, can occur within the first 24 hours of syphilis therapy and may require acute management. This acute febrile reaction is frequently accompanied by headache, myalgia, and/or worsening of secondary syphilis rash and occurs most often in patients with early syphilis.

KEY POINT

Early labor and fetal distress are associated with the Jarisch-Herxheimer reaction. Prompt medical care should be sought by women receiving syphilis treatment during their second half of pregnancy if they experience fever, contractions, or a decrease in fetal movements [Workowski and Bolan 2015].

Treatment Failure

Definition of syphilis treatment failure: In the absence of potential exposure for reinfection, treatment failure is defined by any of the following [Workowski and Bolan 2015]:

• Persistence or development of new clinical signs or symptoms potentially related to syphilis, such as rashes, ulcers, neurologic/ophthalmic signs or symptoms, or gummas.
• Four-fold increase in nontreponemal serology (e.g., RPR 1:4 increases to 1:16).
• Failure of the nontreponemal serology to decrease 4-fold within 12 to 24 months of treatment.

Treatment failure has been reported in patients with HIV at all stages of syphilis, and with all of the recommended regimens. Consultation with a provider experienced in the management of STIs is indicated when a person with HIV experiences syphilis treatment failure. The NYSDOH Clinical Education Initiative Line (866-637-2342) enables clinicians in NYS to discuss PEP, PrEP, HIV, HCV, and STI management with a specialist, and the New York City STD/HIV Prevention Training Center provides HIV-related educational resources and training for providers. Syphilis treatment failure is distinguished from rising titers that are reflective of reinfection. The use of antiretroviral therapy to restore immune function may reduce treatment failure rates in patients with HIV and syphilis [Ghanem et al. 2008].

References

AIDSinfo. Guidelines for Prevention and Treatment of Opportunistic Infections in HIV-Infected Adults and Adolescents. 2017 Apr 12. https://aidsinfo.nih.gov/guidelines/html/4/adult-and-adolescent-oi-prevention-and-treatment-guidelines/0 [accessed 2018 Feb 14]

CDC. Sexually Transmitted Diseases Treatment Guidelines 2010. 2010 Dec 16. https://www.cdc.gov/mmwr/pdf/rr/rr5912.pdf [accessed 2018 Feb 14]

Dowell ME, Ross PG, Musher DM, et al. Response of latent syphilis or neurosyphilis to ceftriaxone therapy in persons infected with human immunodeficiency virus. Am J Med 1992;93(5):481-8. [PMID: 1442850]

Ghanem KG, Moore RD, Rompalo AM, et al. Antiretroviral therapy is associated with reduced serologic failure rates for syphilis among HIV-infected patients. Clin Infect Dis 2008;47(2):258-65. [PMID: 18532887]

Liang Z, Chen YP, Yang CS, et al. Meta-analysis of ceftriaxone compared with penicillin for the treatment of syphilis. Int J Antimicrob Agents 2016;47(1):6-11. [PMID: 26724187]

Marra CM. Neurosyphilis. Continuum (Minneap Minn) 2015;21(6 Neuroinfectious Disease):1714-28. [PMID: 26633785]

Marra CM. Syphilis Screening in Neurology. JAMA Neurol 2016;73(8):926-7. [PMID: 27273549]

Moline HR, Smith JF Jr. The continuing threat of syphilis in pregnancy. Curr Opin Obstet Gynecol 2016;28(2):101-4. [PMID: 26871538]

Rolfs RT, Joesoef MR, Hendershot EF, et al. A randomized trial of enhanced therapy for early syphilis in patients with and without human immunodeficiency virus infection. The Syphilis and HIV Study Group. N Engl J Med 1997;337(5):307-14. [PMID: 9235493]

Smith NH, Musher DM, Huang DB, et al. Response of HIV-infected patients with asymptomatic syphilis to intensive intramuscular therapy with ceftriaxone or procaine penicillin. Int J STD AIDS 2004;15(5):328-32. [PMID: 15117503]

Spornraft-Ragaller P, Abraham S, Lueck C, et al. Response of HIV-infected patients with syphilis to therapy with penicillin or intravenous ceftriaxone. Eur J Med Res 2011;16(2):47-51. [PMID: 21463980]

Workowski KA, Bolan GA. Sexually transmitted diseases treatment guidelines, 2015. MMWR Recomm Rep 2015;64(Rr-03):1-137. [PMID: 26042815]

Zhou P, Qian Y, Xu J, et al. Occurrence of congenital syphilis after maternal treatment with azithromycin during pregnancy. Sex Transm Dis 2007;34(7):472-4. [PMID: 17589329]

Sex and Needle-Sharing Partner Exposure to Syphilis and HIV

Sexually Transmitted Infections Guidelines Committee, February 2018

NYS REQUIREMENTS AND CLINICAL RECOMMENDATIONS

New York State Requirements New York State (NYS) Public Health law requires that clinicians report all suspected or confirmed syphilis and HIV diagnoses to the local health department in the area where the patient resides. See NYSDOH Communicable Disease Reporting Requirements NYS Public Health Law requires that medical providers talk with HIV-infected individuals about their options for informing their sex and needle-sharing partners that they may have been exposed to HIV and syphilis, including the free, confidential partner notification assistance offered by NYSDOH and New York City Department of Health and Mental Hygiene (NYC DOHMH). See NYSDOH Protocol – Domestic Violence Screening in Relation to HIV Counseling, Testing, Referral & Partner Notification. See NYSDOH Information on Partner Services and NYC DOHMH Contact Notification Assistance Program (CNAP) for STI/HIV partner notification assistance. Exposed Sex and Needle-Sharing Partners Clinicians should test and treat patients who report exposure to syphilis according to the recommendations in Table 5: Standard Testing and Treatment of Sex Partners Exposed to Syphilis. (A2) When a patient with HIV is diagnosed with syphilis, clinicians should advise the patient to encourage sex and needle-sharing partners to seek medical care for possible exposure to both HIV and syphilis. (A3)

Sexual transmission of T. pallidum occurs in the presence of mucocutaneous syphilitic lesions. These lesions are uncommon after the first year of infection [Workowski and Bolan 2015].

Presentation of a new sexually transmitted infection (STI) in a patient with HIV suggests sex partner exposure to both HIV and the STI. Clinicians should inform patients that any sex or needle-sharing partner who does not have confirmed HIV infection should have routine HIV testing for early identification of HIV acquisition. If a patient with an HIV exposure presents within 36 hours, evaluation for non-occupational post-exposure prophylaxis should occur. When possible, onsite availability of HIV testing and STI treatment for partners is ideal because it may increase the likelihood that partners will receive timely access to HIV testing and appropriate treatment, including HIV post-exposure prophylaxis and treatment for the STI as needed (see the NYSDOH AI guideline PEP to Prevent HIV Infection). Such strategies may also increase identification of individuals who require ongoing medical care. Partner education about reducing high-risk behaviors, including counseling about the use of barriers, such as male and female condoms, and making condoms visibly available in the clinic, may further decrease the risk of transmission of both HIV and other STIs. Patient education about Undetectable=Untransmittable (U=U) as an HIV prevention strategy should stress that an undetectable HIV viral load prevents only the sexual transmission of HIV. Consistent and correct condom use remains the best method for preventing pregnancy and the transmission of STIs other than HIV. Data are lacking to determine whether U=U prevents HIV transmission through needle sharing.

The NYSDOH Partner Services program provides assistance to individuals with HIV and to care providers who would like help notifying a patient’s sex partner(s) of possible exposure to HIV, chlamydia, gonorrhea, or syphilis. Available options for partner notification include anonymous notification from the local health department, dual disclosure (patient disclosure with the help of Partner Services staff), and self-disclosure. Partner Services staff within local health departments work with patients to develop a plan to notify their partners, whether that plan includes staff notifying potentially exposed partners anonymously or helping patients who choose to tell their partners on their own develop a notification plan and strategy [CDC 2017].

The local health department will confidentially notify sex partners exposed to syphilis about the need for clinical and serologic evaluation and for treatment if they are diagnosed with syphilis. Standard testing and treatment for exposed sex partners is described in Table 4: Standard Testing and Treatment of Sex Partners Exposed to Syphilis, below. Long-term sex partners of patients diagnosed with latent syphilis should be evaluated clinically and serologically for syphilis and treated on the basis of findings.

KEY POINTS

When a patient with HIV is diagnosed with syphilis, the clinician should inform the patient about the implications of the diagnosis for his/her sex partner(s): A new STI diagnosis signals that the patient was engaging in sexual behaviors that place sex partners at increased risk of acquiring HIV infection. A sex partner may also have been exposed to syphilis and should be tested and evaluated for treatment. The local health department may contact a sex partner confidentially about the potential exposure and treatment options. Clinicians should provide patients with information and counseling about notifying partners, risk reduction, and safer sex practices.

Table 5: Standard Testing and Treatment of Sex Partners Exposed to Syphilis [a]
Timing of Partner Exposure	Testing	Treatment	Key Points
Within 90 days of the patient’s diagnosis of primary, secondary, or early latent syphilis	Baseline testing	Presumptive [b] (A2)	After initial infection, the incubation period of syphilis can last from 3 weeks to 3 months; therefore, sex partners who were exposed within 90 days of a patient’s diagnosis of primary, secondary, or early latent syphilis may be infected (incubating infection) even if their serologic syphilis test is nonreactive. Sex partners who were exposed within 90 days of a patient’s diagnosis of primary, secondary, or early latent syphilis should receive presumptive treatment.
>90 days before a patient’s diagnosis of primary, secondary, or early latent syphilis	Baseline testing	Based on test results (A3)	Sex partners may be treated presumptively [b] if serologic test results are not available immediately and the opportunity for follow-up is unlikely.
Adapted from Centers for Disease Control and Prevention [Workowski and Bolan 2015]. Baseline syphilis testing of sex partners treated presumptively should still be performed to ensure that, if positive, other individuals who may have been exposed are notified and treated.

References

Centers for Disease Control and Prevention (CDC). 2016 Sexually Trasmitted Diseases Surveillance: STDs in Men Who Have Sex With Men. 2017 Aug 18. https://www.cdc.gov/std/stats16/msm.htm [accessed 2018 Feb 14]

Workowski KA, Bolan GA. Sexually transmitted diseases treatment guidelines, 2015. MMWR Recomm Rep 2015;64(Rr-03):1-137. [PMID: 26042815]

All Recommendations

Sexually Transmitted Infections Guidelines Committee, February 2018

ALL RECOMMENDATIONS: MANAGEMENT OF SYPHILIS IN PATIENTS WITH HIV

Transmission and Prevention Clinicians should inform patients with HIV about the risk of acquiring syphilis and other sexually transmitted infections (STIs) from close physical contact with all sites of possible exposure, including the anus, cervix, vagina, urethra, tongue, oropharynx, or any other location where infectious lesions may be present. (A3) Patient Education When patients with HIV are diagnosed with early syphilis (primary, secondary, or early latent stage), clinicians should educate patients about the following: Risk-reduction strategies, including the value of condom use (A2) The potential for oral transmission of syphilis (A3), The benefits of identifying infection early (A3), and The need for prompt evaluation and therapy for sex partners (A3). Serologic Screening Clinicians should obtain serologic screening for syphilis at least annually for all patients with HIV (see Table 2: Screening and Diagnostic Tests for Syphilis and Table 3: Interpretation of Results of Reverse-Sequence Testing for Syphilis). (A2) In response to the current epidemiology in NYS, clinicians should perform syphilis screening every 3 months (A3) for HIV-infected men who have sex with men (MSM) at highest risk of syphilis infection, including those who: Report, or whose partners report, multiple or anonymous sex partners. (A3) Have been, or whose sex partners have been, diagnosed with or treated for a bacterial sexually transmitted infection (STI) since the last evaluation. (A3) Engage, or whose sex partners may engage, in sexual activity at sex parties or other high-risk venues. (A3) Are involved, or whose sex partners may be involved, in transactional sex (e.g., sex workers and their clients). (A3) Report recreational substance use during sexual activity. (A3) Self-identify as at high risk of STIs. (A3) Screening in Pregnancy Clinicians should obtain serologic screening for syphilis for pregnant patients with HIV at the first prenatal visit, during the third trimester (28 to 32 weeks of gestation), and at delivery. (A2) See Screening for Syphilis Infection in Pregnancy: U.S. Preventive Services Task Force Reaffirmation Recommendation Statement for information about syphilis screening during pregnancy [Curry, et al. 2018]. Sexual History Clinicians should ask all patients about sexual behaviors and new sex partners at each routine monitoring visit to assess for risk behaviors that require repeat or ongoing screening. (A3) Presentation and Diagnosis As part of the initial and then annual comprehensive physical examination for patients with HIV, clinicians should examine all skin and mucosal surfaces for lesions, especially less-visible areas, such as the anus, cervix, vagina, vulva, urethra, oropharynx, and under the foreskin in uncircumcised males. (A3) Clinicians should perform a neurologic review of systems, including ophthalmologic and otic, for all patients with HIV who are diagnosed with syphilis and follow up with further neurologic evaluation, as recommended in Table 4: Recommended Treatment and Follow-Up of Syphilis in Patients with HIV. (A2) Clinicians should ensure that two-stage syphilis testing is performed by the laboratory if the initial screen is reactive. (A1) Clinicians should perform a nontreponemal test, such as the rapid plasma reagin (RPR) or venereal disease research laboratory (VDRL) test, for repeat screening in patients who have a history of syphilis infection. (A1) Clinicians should perform gonorrheal and chlamydial testing for any patient with HIV who is diagnosed with syphilis infection. (A2) Clinicians should include neurosyphilis in the differential diagnosis of all patients with HIV who present with neurologic, ophthalmologic, otic, or neuropsychiatric signs or symptoms. (A2) Clinicians should perform a lumbar puncture in patients with HIV who have syphilis or a history of syphilis when patients present with the following: Neurologic or neuropsychiatric signs or symptoms that are not explained by another etiology. (A2) Note: Patients with isolated otic symptoms or ocular symptoms with accompanying physical exam findings consistent with ocular syphilis do not require a lumbar puncture because treatment for neurosyphilis is indicated even if cerebrospinal fluid is normal. Evidence of treatment failure (see Treatment Failure in the Treatment and Follow-Up section of this guideline). (A2) Evidence of active tertiary syphilis (aortitis, gummas). (A3) Reporting: New York State Requirement Clinicians must report all suspected or confirmed syphilis diagnoses to the local health department of the area where the patient resides according to NYS requirements. See NYSDOH Communicable Disease Reporting and NYC Health Reporting Diseases and Conditions. Treatment Because of the possibility of false-negative test results in primary syphilis, clinicians should presumptively treat patients at risk of syphilis who present with a lesion typical of a syphilitic chancre. (A3) Clinicians should use long-acting benzathine penicillin G as the recommended treatment for syphilis in patients with HIV. (A2) See Table 3: Recommendations for Treatment and Follow-Up of Syphilis in Patients with HIV for dose and frequency according to stage of syphilis. Clinicians should use only penicillin to treat all stages of syphilis in pregnant patients. (A2) Clinicians should obtain baseline and monthly assessment of serum nontreponemal reagin levels when treating syphilis in pregnant patients with HIV if the risk of syphilis reinfection is high. (A3) Treatment in Penicillin-Allergic Patients Clinicians should administer desensitization therapy followed by penicillin therapy to treat penicillin-allergic patients who have neurosyphilis, other forms of tertiary syphilis, syphilis in pregnancy, or syphilis that cannot be treated by an alternative regimen. (A2) Clinicians should administer desensitization therapy for patients with HIV, followed by penicillin therapy, rather than attempt alternate therapies if adherence to therapy or close follow-up cannot be ensured. (A3) Clinicians should not prescribe azithromycin to treat syphilis in patients with HIV. (A2) Jarisch-Herxheimer Reaction In women treated for syphilis infection during the second half of their pregnancy, clinicians should Obtain a fetal sonogram to evaluate for congenital syphilis. (A2) Advise women who experience fever, contractions, or a decrease in fetal movements to seek immediate obstetric care. (A2) Treatment Failure Clinicians should perform CSF examination for patients who experience treatment failure, and: Initiate parenteral therapy using a recommended penicillin regimen for late latent syphilis if CSF test results are negative. (A2) Treat using a recommended penicillin regimen for neurosyphilis if CSF test results are positive. (A2) New York State Requirements New York State (NYS) Public Health law requires that clinicians report all suspected or confirmed syphilis and HIV diagnoses to the local health department in the area where the patient resides. See NYSDOH Communicable Disease Reporting Requirements NYS Public Health Law requires that medical providers talk with HIV-infected individuals about their options for informing their sex and needle-sharing partners that they may have been exposed to HIV and syphilis, including the free, confidential partner notification assistance offered by NYSDOH and New York City Department of Health and Mental Hygiene (NYC DOHMH). See NYSDOH Protocol – Domestic Violence Screening in Relation to HIV Counseling, Testing, Referral & Partner Notification. See NYSDOH Information on Partner Services and NYC DOHMH Contact Notification Assistance Program (CNAP) for STI/HIV partner notification assistance. Exposed Sex and Needle-Sharing Partners Clinicians should test and treat patients who report exposure to syphilis according to the recommendations in Table 5: Standard Testing and Treatment of Sex Partners Exposed to Syphilis. (A2) When a patient with HIV is diagnosed with syphilis, clinicians should advise the patient to encourage sex and needle-sharing partners to seek medical care for possible exposure to both HIV and syphilis. (A3)

How This Guideline Was Developed

The New York State Department of Health (NYSDOH) AIDS Institute (AI) protects and promotes the health of New York State’s diverse population through disease surveillance and the provision of quality services for prevention, health care, and psychosocial support for those affected by HIV/AIDS, sexually transmitted infections, viral hepatitis, and related health concerns. In addition, the NYSDOH AI promotes the health of LGBT populations, substance users, and the sexual health of all New Yorkers.

Sexually Transmitted Infections Guidelines Committee

The NYSDOH AI charged the Sexually Transmitted Infections (STI) Guidelines Committee with developing evidence-based clinical recommendations for primary care clinicians in NYS who treat individuals with syphilis and HIV coinfection. The purpose of the Management of Syphilis in Patients with HIV clinical practice guideline is to aid primary care providers and other clinicians in New York State who manage the care of adult patients with HIV who are at risk of or diagnosed with syphilis.

Committee Makeup: Members of the STI Guidelines Committee (see Box 1: STI Guidelines Committee Leaders, Members, and Guideline Reviewers, below) were appointed by the NYSDOH AI to ensure representation of clinical practice in all major regions of the state, relevant medical disciplines and sub-specialties, key NYS agencies, community stakeholders, and patient advocates. Individuals confirmed as Committee members are required to disclose any potential conflicts of interest; disclosures are reviewed and approved by the NYSDOH AIDS Institute Office of the Medical Director (see Funding and Financial Disclosure of Potential Conflicts of Interest, below).

Committee Role: Committee members actively participate in guideline development, including evidence review, drafting of recommendations and text, manuscript review, consensus approval of all recommendations, and rating of recommendations.

Committee Leadership: Working with the lead author, the STI Guidelines Committee Planning Group of Committee leaders reviewed and refined the manuscript, facilitated consensus approval of all recommendations, and addressed feedback from external peer and consumer reviewers.

Johns Hopkins University (JHU) Editorial Role: The JHU editorial team coordinated, guided, and documented all Committee activities, and edited the guideline material for clarity, flow, and style.

Sexually Transmitted Infections Guidelines Committee

Planning Group (all Committee members and reviewers are listed in Box C1, below)

• Chair: Marguerite A. Urban, MD
  University of Rochester Medical Center, Rochester, NY
• Vice-Chair: Michael H. Augenbraun, MD, FACP, FIDSA 
  SUNY Downstate, Brooklyn, NY  
• JHU Principal Investigator: Christopher J. Hoffmann, MD, MPH
  Johns Hopkins University School of Medicine, Division of Infectious Diseases, Baltimore, MD
• Charles J. Gonzalez, MD
  AIDS Institute Associate Medical Director for Science and Policy

AIDS Institute and JHU Editorial and Program Management Team

• Laura Duggan Russell, MPH, AI Guidelines Program Manager
• Mary Beth Hansen, MA, JHU Guidelines Project Director
• Christina Norwood, MS, ELS, JHU Senior Editor
• Johanna Gribble, MA, JHU Medical Editor
• Jen Ham, MPH, JHU Medical Editor
• Jesse Ciekot, JHU Program Coordinator

Box 1: STI Guidelines Committee Leaders, Members (when this guideline was developed) Guideline Reviewers

Leadership Chair: Marguerite A. Urban, MD, University of Rochester Medical Center, Rochester, NY Vice-Chair: Michael H. Augenbraun, MD, FACP, FIDSA  SUNY Downstate, Brooklyn, NY   Deputy Medical Director: Lyn Stevens, MS, NP, ACRN, New York State Department of Health AIDS Institute, Albany, NY JHU Principal Investigator: Christopher J. Hoffmann, MD, MPH, Johns Hopkins University School of Medicine, Division of Infectious Diseases, Baltimore, MD Contributing Members and Liaisons Elizabeth Asiago-Reddy, MD, SUNY Upstate, Syracuse, NY Gale R. Burstein, MD, MPH, FAAP, Erie County Department of Health, Buffalo, NY Michael M. Gaisa, PhD, MD, Mount Sinai, New York, NY Shelley Gilroy, MD, Albany Medical College, Albany, NY Sachin Jain, MD, Albert Einstein College of Medicine/Montefiore Medical Center, Bronx, NY Marla J. Keller, MD, Albert Einstein College of Medicine/Montefiore Medical Center, Bronx, NY Anita P. LaSala, MD, Columbia University Medical Center, New York, NY Robert Murayama, MD, MPH, Apicha Community Health Center, New York, NY Michel Ng, NP, Mount Sinai School of Medicine, New York, NY Thomas Panzella, PAC, HEAT/Downstate, Brooklyn, NY Asa Radix, MD, MPH, FACP, AAHIVS, Callen-Lorde Community Health Center, New York, NY David W. Rosenthal, DO, PhD, Northwell Health Physician Partners, Great Neck, NY Heather M. Territo, MD, University at Buffalo-SUNY, Buffalo, NY External Peer Reviewers Anna Huang, MD, Bureau of STD Control, New York City Department of Health and Mental Hygiene, New York, NY Allison Muse, MPH, Emerging Infections Program, New York State Department of Health, New York, NY

Funding and Disclosure of Potential Conflicts of Interest (COIs)

Funding: New York State funds supported development of the Management of Syphilis in Patients with HIV guideline through a grant awarded to the Johns Hopkins University School of Medicine, Division of Infectious Diseases, from the New York State Department of Health AIDS Institute.

Conflicts of interest: All active STI Guidelines Committee members, invited consultants and coauthors, peer reviewers, and program staff are required to disclose financial relationships with commercial entities, including gifts that may be actual conflicts of interest or may be perceived as conflicts. These individuals must disclose financial relationships annually, for themselves, their partners/spouses, and their organization/institution. On their annual disclosures, STI Guidelines Committee members are asked to report for the previous 12 months and the upcoming 12 months. Box 2, below, lists reported conflicts.

Management of COIs: All reported financial relationships with commercial entities are reviewed by the NYSDOH AI guidelines program to assess the potential for undue influence on guideline recommendations made by the Committee. For the Committee members reporting potential conflicts, it was determined that the nature of the reported financial relationships with commercial entities would not pose undue influence on the guideline recommendations.

All guideline recommendations received consensus approval of the full STI Guidelines Committee, and the final review and approval of the recommendations was performed by the Committee Chair, and the NYSDOH AI Deputy Medical Director, none of whom reported conflicts of interest.

External peer reviewers were also required to submit COI/financial disclosure information, which were similarly screened. Neither peer reviewer reported conflicts.

Box 2: Reported Conflicts of Interest/Financial Disclosure Results
Committee Member’s Role	Disclosures
Planning Group	Grant/research support: Starpharma Holdings Limited; Becton Dickinson
Contributor	Speakers’ Bureau: Gilead
Contributor	Pharmacy and Therapeutic Committee: Capital District Physicians’ Health Plan, Inc.; Research support: Gilead, KOWA Pharmaceuticals

Evidence Collection and Review

The NYSDOH AI guideline development process is based on a strategic search and analysis of the published evidence. Box 3 illustrates the evidence review and selection process.

Box 3: Evidence Collection and Review Processes

NYSDOH AI and STI Guidelines Committee defined the goal of the guideline: To provide evidence-based clinical recommendations for the management of syphilis in individuals with HIV. The STI Guidelines Committee appointed a lead author, who conducted a systematic literature search in PubMed using MeSH terms. All searches were limited to studies that 1) were published within the previous 5 years; 2) involved only human subjects; and 3) were published in English. Lead author reviewed studies identified through searches and excluded some based on clinical relevance to the guideline, publication type, study design, and participants. Author and editorial staff conducted additional searches using PubMed and online databases to identify: Studies published prior to the 5-year search limit Studies published during the guideline development process Recent conference abstracts Older studies known to provide strong evidence in support of specific recommendations or to undergird expert opinion New York State epidemiologic data Lead author developed and all STI Guidelines Committee members reviewed and approved evidence-based guideline recommendations: Planning group reviewed, deliberated, refined, and approved draft recommendations. STI Guidelines Committee members reviewed, provided written comment on, deliberated, and reached consensus on recommendations Planning group reviewed the cited evidence and assigned a two-part rating to each recommendation to indicate the strength of the recommendation and the quality of the supporting evidence; consensus reached on ratings. Additional evidence identified and cited during the rating process (see Box C4, below) Ongoing update process JHU editorial staff will surveil published literature on an ongoing basis to identify new evidence that may prompt changes to existing recommendations or development of new recommendations JHU editorial staff will ensure that the STI Guidelines Committee reviews new studies at least four times per year, and more often if newly published studies, new drug approval, or drug-related warning indicate the need for an immediate change to the published guideline. JHU editorial staff will track, summarize, and publish ongoing changes to the guideline The STI Guidelines Committee reviews and approves substantive changes to, additions to, or deletions of recommendations The Committee will initiate a full review of the guideline 4 years after the original publication date NYSDOH AI will publish a comprehensive update 5 years after the original publication date

Recommendation Development and Rating Process

The clinical recommendations presented in this guideline were developed by consensus based on a synthesis of the current evidence collected through the systematic search described above. If no data were available, the recommendations are based on expert opinion, and this status is indicated in the rating and in the text.

The Planning Group met via monthly teleconferences over approximately 24 months to finalize the guideline and reach consensus on recommendations and rationale. Once consensus among the Planning Group members was reached, the guideline was reviewed by the full STI Guidelines Committee, and consensus was reached on all recommendations. These deliberations were conducted by teleconference; STI Guidelines Committee members were invited to submit comments in writing as well. Committee review discussions were recorded, and recordings were reviewed carefully to ensure that all decisions and changes were captured and integrated into the manuscript.

Members of the Planning Group then individually reviewed the evidence for each recommendation and assigned a two-part rating (see below). The individual ratings were compiled into a report distributed to all raters, and conference call discussions were held to deliberate ratings for which consensus was needed. Once all raters agreed on the interpretation of evidence and ratings for all recommendations, the guideline was sent to the NYSDOH AI for review and approval.

AIDS Institute HIV Clinical Guidelines Program Recommendations Rating Scheme
Strength of Recommendation	Quality of Supporting Evidence
A = Strong	1 = At least 1 randomized trial with clinical outcomes and/or validated laboratory endpoints
B = Moderate	2 = One or more well-designed, nonrandomized trial or observational cohort study with long-term clinical outcomes
C = Optional	3 = Expert opinion

External Review

Two external peer reviewers recognized for their experience and expertise in HIV care were identified by program leaders (see Box A1). These individuals submitted a financial disclosure statement for the purpose of identifying potential conflicts of interest before participating as peer reviewers; neither disclosed financial relationships with commercial entities in the 12 months prior or the 12 months following submission of the disclosure.

Peer reviewers were asked to review the guideline for accuracy, balance, clarity, and practicality of the recommendations for primary care providers. The Planning Group addressed peer review feedback; any conflicting opinions were resolved by the Committee chairs. Members of NYSDOH AI Community Advisory Committee also reviewed and commented on the guideline.

Guideline Update Process

Members of the STI Guidelines Committee will monitor developments in the management of syphilis in patients with HIV in an ongoing structured manner to maintain guideline currency. Once the guidelines are published on the program website: www.hivguidelines.org, any updates will be made to the HTML document as needed as new peer-reviewed literature on the management of syphilis in general and in the setting of HIV infection specifically is published.

Notification of newly published studies will be automated, and the Planning Group will review new data at least every 4 months. Newly published data that provide support for existing recommendations will be cited in the text, and the studies will be added to the reference list(s).

If newly published data prompt a revision to recommendations or rationale, the Planning Group will propose appropriate edits and determine whether the changes warrant review and approval by the entire STI Guidelines Committee. If STI Guidelines Committee review is required, a conference call will be convened for that purpose. Deletion of existing recommendations, addition of any new recommendations, and/or substantive changes to existing recommendations will prompt STI Guidelines Committee review and consensus.

If a new medication or formulation is approved, the Planning Group will be convened via conference call to examine the data, consider inclusion in the guideline, and determine the need for STI Guidelines Committee review and approval.

The full guideline will be reviewed and updated on the 4th anniversary of original publication to prepare for publication of an updated guideline on or before the 5th anniversary of original publication.

Updates to This Guideline

Sexually Transmitted Infections Guidelines Committee, February 2018

July 2021

Updated recommendation in the Syphilis and Neurosyphilis: Presentation, Diagnosis, and Reporting section: 

• Clinicians should perform a lumbar puncture in patients with HIV who have syphilis or a history of syphilis when patients present with:
  • Neurologic, ophthalmologic, otic, or neuropsychiatric signs or symptoms that are not explained by another etiology. (A2)
    • Note: Patients with isolated otic symptoms or ocular symptoms with accompanying physical exam findings consistent with ocular syphilis do not require a lumbar puncture because treatment for neurosyphilis is indicated even if cerebrospinal fluid is normal.

January 2020

Updates to the Screening section include the following:

• Updated recommendation: “Clinicians should obtain serologic screening for syphilis for pregnant patients with HIV at the first prenatal visit, during the third trimester (28 to 32 weeks of gestation), and at delivery. (A2)”
• Added supplemental text: “Congenital syphilis cases increased by 185% in the United States between 2014 and 2018 [CDC 2019] and by 200% in NYS outside of New York City (NYC) during that same time frame [NYSDOH unpublished data]. NYC experienced a 185% increase in congenital syphilis cases from 2017 to 2018 [New York City Department of Health and Mental Hygiene 2019]. An investigation of 68 cases of congenital syphilis from NYC published in 2018 revealed that screening for syphilis did not occur prior to delivery in 37% of cases due to a lack of prenatal care (21/26) or lack of a performed screening test during care (5/26). Another 30% of identified cases occurred in individuals who acquired syphilis during pregnancy but after receiving a time-appropriate nonreactive screening test result [Slutsker, et al. 2018]. Given the historically high rates of congenital syphilis in NYS, recent data regarding acquisition of syphilis during pregnancy and the known benefits of treatment of syphilis during pregnancy, this committee recommends an additional screening test be performed early in the third trimester at 28 to 32 weeks of gestation. Other entities, including the U.S. Preventive Services Task Force (USPSTF) [Curry, et al. 2018], the 2015 CDC STD Treatment Guidelines [Workowski and Bolan 2015], the American College of Obstetrics and Gynecology (ACOG) and the American College of Pediatrics [AAP and ACOG 2017], recommend screening at the first visit and at delivery during all pregnancies and recommend third-trimester screening for all pregnant individuals at high risk of exposure and after exposure to an untreated sex partner. Individuals who live high-prevalence communities, or have HIV, or have a history of incarceration or commercial sex work are considered at high risk of exposure [Curry, et al. 2018]. In April 2018, the NYC Department of Health and Mental Hygiene also recommended screening for syphilis at first visit, at 28 weeks of gestation, and at delivery for all pregnant patients [NYCDHMH 2019].”

February 2018

Key updates in the 2018 guideline include the following:

• Added Purpose of This Guideline section, which covers the burden of syphilis infection, role of NYS primary care providers in the diagnosis and treatment of STIs, and the development of the guideline.
• Revised the recommendation for screening frequency from every 4 months to every 3 months for persons at highest risk of syphilis infection regardless of the frequency of their HIV monitoring visits. (see Screening)
• Added Table 2: Screening and Diagnostic Tests for Syphilis. 
• Added Figure 3: Standard Protocol for Syphilis Screening and Diagnosis and Figure 4: Alternative, Reverse Algorithm for Syphilis Screening and Diagnosis. 
• Added Table 3: Interpretation of Results of Reverse-Sequence Testing for Syphilis. 
• Expanded the discussion of NYS disease reporting requirements for syphilis and HIV. (see Syphilis and Neurosyphilis: Presentation, Diagnosis, and Reporting and Sex and Needle-Sharing Partner Exposure to Syphilis and HIV)
• Revised follow-up intervals in Table 4: Recommended Treatment and Follow-Up of Syphilis in Patients with HIV.