Susan Blank

Men who have sex with men have a 140-fold higher risk for newly diagnosed HIV and syphilis compared with heterosexual men in New York City.

ObjectivesTo describe the population of men who have sex with men (MSM) in New York City, compare their demographics, risk behaviors, and new HIV and primary and secondary (P&S) syphilis rates with those of men who have sex with women (MSW), and examine trends in infection rates among MSM. DesignPopulation denominators and demographic and behavioral data were obtained from population-based surveys during 2005–2008. Numbers of new HIV and P&S syphilis diagnoses were extracted from city-wide disease surveillance registries. MethodsWe calculated overall, age-specific and race/ethnicity-specific case rates and rate ratios for MSM and MSW and analyzed trends in MSM rates by age and race/ethnicity. ResultsThe average prevalence of male same-sex behavior during 2005–2008 (5.0%; 95% CI: 4.5 to 5.6) differed by both age and race/ethnicity (2.3% among non-Hispanic black men; 7.4% among non-Hispanic white men). Compared with MSW, MSM differed significantly on all demographics and reported a higher prevalence of condom use at last sex (62.9% vs. 38.3%) and of past-year HIV testing (53.6% vs. 27.2%) but also more past-year sex partners. MSM HIV and P&S syphilis rates were 2526.9/100,000 and 707.0/100,000, each of which was over 140 times MSW rates. Rates were highest among young and black MSM. Over 4 years, HIV rates more than doubled and P&S syphilis rates increased 6-fold among 18-year-old to 29-year-old MSM. ConclusionsThe substantial population of MSM in New York City is at high risk for acquisition of sexually transmitted infections given high rates of newly diagnosed infections and ongoing risk behaviors. Intensified and innovative efforts to implement and evaluate prevention programs are required.

A case-control Study of syphilis among men who have sex with men in New York City: Association with HIV infection

Objective: The objective of this study was to determine factors associated with syphilis among men who report sex with other men in New York City. Design, Setting and Study Subjects: We conducted a case–control study among 88 men who reported sex with men in the previous year, 18 to 55 years old and diagnosed with primary or secondary syphilis during 2001; and 176 control subjects frequently matched by age and type of health provider. Results: HIV prevalence among syphilis cases was 48% compared with 15% among control subjects (P <0.001). Variables associated with syphilis in a multivariate model were HIV infection (odds ratio [OR], 7.3; 95% confidence interval [CI], 3.5–15.4), income >

Chlamydia trachomatis and neisseria gonorrhoeae prevalence and coinfection in adolescents entering selected US Juvenile Detention Centers, 1997-2002

30,000 per year (OR, 2.7; CI, 1.4–5.2), and barebacking (OR, 2.6; CI, 1.4–4.8). The median time since HIV diagnosis for HIV-positive was 6 years for cases and 7 years for control subjects (P = 0.70). Among HIV-infected participants, syphilis cases were more likely than control subjects to report being on antiretroviral therapy (69% vs. 44%, P = 0.05) and to report having undetectable viral load (58% vs. 24%, P = 0.02). Conclusion: HIV infection was strongly associated with syphilis in this study. High-risk behavior reported by both cases and control subjects indicates the potential for increased HIV transmission.

HIV Incidence Among Men With and Those Without Sexually Transmitted Rectal Infections: Estimates From Matching Against an HIV Case Registry

Background: Juvenile detention centers offer public health practitioners an opportunity to gain access to large numbers of adolescents at risk for chlamydia and gonorrhea. Goal: To describe the prevalence and coinfection of chlamydia and gonorrhea among adolescents in 14 US juvenile detention centers from 1997 to 2002. Study: We calculated the prevalence of chlamydia and gonorrhea in males and females, stratified by race/ethnicity, age group, and site. We also calculated the proportion of adolescents with chlamydia that were coinfected with gonorrhea and the proportion of those with gonorrhea that were coinfected with chlamydia. Results: The prevalence of chlamydia was 15.6% in 33,619 females and 5.9% in 98,296 males; gonorrhea prevalence was 5.1% in females and 1.3% in males. Of females with gonorrhea, 54% were coinfected with chlamydia, and 51% of males with gonorrhea were coinfected with chlamydia. Conclusions: Chlamydia and gonorrhea prevalence was very high in females in all project sites. In males, chlamydia prevalence was high in some areas; however, gonorrhea prevalence was substantially lower. These prevalence data justify screening for chlamydia and gonorrhea among female adolescents in juvenile detention centers nationally.

Extensive Genetic Diversity, Unique Population Structure and Evidence of Genetic Exchange in the Sexually Transmitted Parasite Trichomonas vaginalis

BACKGROUND Sexually transmitted bacterial rectal infections are objective markers of HIV risk behavior. Quantifying HIV risk among men who have sex with men (MSM) who have had these infections can inform prevention efforts. We measured HIV risk among MSM who have and those who have not been diagnosed with rectal Chlamydia trachomatis (CT) and/or rectal Neisseria gonorrhoeae (GC). METHODS HIV incidence among a cohort of 276 HIV-negative MSM diagnosed with rectal CT and/or GC in New York City sexually transmitted disease (STD) clinics was compared to HIV incidence among HIV-negative MSM without these infections. Matches against the citywide HIV/AIDS registry identified HIV diagnoses from STD clinics, and by other providers. Cox proportional hazards models were used to explore factors associated with HIV acquisition among MSM with rectal infections. RESULTS HIV-negative MSM with rectal infections (>70% of which were asymptomatic) contributed 464.7 person-years of follow-up. Among them, 31 (11.2%) were diagnosed with HIV, of whom 14 (45%) were diagnosed by non-STD clinic providers. The annual HIV incidence was significantly higher among MSM with rectal infections (6.67%; 95% confidence interval [CI], 4.61%-9.35%) than among MSM without rectal infections (2.53%; 95% CI, 1.31%-4.42%). Black race (hazard ratio, 4.98; 95% CI, 1.75-14.17) was associated with incident HIV among MSM with rectal CT/GC. CONCLUSIONS One in 15 MSM with rectal infections was diagnosed with HIV within a year, a higher risk than for MSM without rectal infections. Such data have implications for screening for rectal STD, and may be useful for targeting populations for risk-reduction counseling and other HIV prevention strategies, such as preexposure prophylaxis.

Predictors of acceptance of hepatitis B vaccination in an urban sexually transmitted diseases clinic.

Background Trichomonas vaginalis is the causative agent of human trichomoniasis, the most common non-viral sexually transmitted infection world-wide. Despite its prevalence, little is known about the genetic diversity and population structure of this haploid parasite due to the lack of appropriate tools. The development of a panel of microsatellite makers and SNPs from mining the parasites genome sequence has paved the way to a global analysis of the genetic structure of the pathogen and association with clinical phenotypes. Methodology/Principal Findings Here we utilize a panel of T. vaginalis-specific genetic markers to genotype 235 isolates from Mexico, Chile, India, Australia, Papua New Guinea, Italy, Africa and the United States, including 19 clinical isolates recently collected from 270 women attending New York City sexually transmitted disease clinics. Using population genetic analysis, we show that T. vaginalis is a genetically diverse parasite with a unique population structure consisting of two types present in equal proportions world-wide. Parasites belonging to the two types (type 1 and type 2) differ significantly in the rate at which they harbor the T. vaginalis virus, a dsRNA virus implicated in parasite pathogenesis, and in their sensitivity to the widely-used drug, metronidazole. We also uncover evidence of genetic exchange, indicating a sexual life-cycle of the parasite despite an absence of morphologically-distinct sexual stages. Conclusions/Significance Our study represents the first robust and comprehensive evaluation of global T. vaginalis genetic diversity and population structure. Our identification of a unique two-type structure, and the clinically relevant phenotypes associated with them, provides a new dimension for understanding T. vaginalis pathogenesis. In addition, our demonstration of the possibility of genetic exchange in the parasite has important implications for genetic research and control of the disease.

Seroprevalence of herpes simplex virus type 2 and characteristics associated with undiagnosed infection: New York City, 2004.

Background: Individuals who use sexually transmitted disease (STD) clinics are at high risk for hepatitis B virus (HBV). While HBV vaccine is frequently offered to clients in this setting, reported vaccination rates are low. More information is needed about HBV vaccine knowledge, attitudes, beliefs, and behavior among high risk populations. The current study assesses these issues at an urban STD clinic. Methods: A survey assessing knowledge, attitudes, and beliefs concerning HBV vaccine was administered to individuals seeking services at an STD clinic before seeing the physician. Immediately after the clinical visit these individuals were interviewed and asked whether they had accepted vaccination and their reasons for acceptance or rejection. Results: Fifty percent of unvaccinated study subjects elected to receive an HBV vaccine dose at the current visit. Significant predictors in a multiple logistic regression model for choosing to be vaccinated were: having a vaccinated acquaintance, perceived risk of disease, perceived healthfulness of vaccine, and clinician’s recommendation. Knowledge regarding hepatitis B risks and outcomes was not related to vaccine choices. Patients expressed concern about vaccine safety and provider motivation. Conclusions: The role of acquaintances and the physician are central to the decision to be vaccinated, as are risk perception and familiarity with the vaccine. Mistrust of the medical establishment and of vaccines is a barrier to acceptance of HBV vaccine.

Reaching out to boys at bars: utilizing community partnerships to employ a wellness strategy for syphilis control among men who have sex with men in New York City.

Background: Herpes simplex virus type 2 (HSV-2) infection is associated with substantial morbidity and increased risk for human immunodeficiency virus acquisition. We describe HSV-2 seroprevalence in adult New Yorkers, and examine the relationship between select characteristics, infection, and diagnosis. Methods: HSV-2 seroprevalence and risk factors were measured using the 2004 New York City Health and Nutrition Examination Survey, a population-based cross-sectional survey of adults. HSV-2 seroprevalence and corresponding 95% confidence intervals were computed for select characteristics. Associations between proposed risk factors and HSV-2 infection and diagnosis were estimated using unadjusted and adjusted odds ratios. Results: Nearly 28% of adults were infected with HSV-2; 88.4% of HSV-2 positive persons were undiagnosed. Black women had the highest seroprevalence (59.7%) of any sex or race/ethnicity group. Women, non-Hispanic blacks, and Hispanics (vs. non-Hispanic whites), and men who have sex with men were at greater odds of HSV-2 infection. Among HSV-2 infected individuals, non-Hispanic blacks (vs. non-Hispanic whites), uncircumcised men, and those with no routine place of care were less likely to be diagnosed. Conclusions: HSV-2 is highly prevalent and largely undiagnosed in New York City; seroprevalence varies by subgroup. Targeted HSV-2 screening, counseling and treatment may help reduce transmission of HSV-2 and human immunodeficiency virus.

Effectiveness of the VOICES/VOCES sexually transmitted disease/human immunodeficiency virus prevention intervention when administered by health department staff: does it work in the "real world"?

Objective: To explore the impact of a holistic approach for syphilis control to improve the sexual health and well-being of men who have sex with men (MSM). Goal: The New York City Department of Health & Mental Hygiene (NYC DOHMH) developed Hot Shot! to address a variety of general MSM health issues, including syphilis, gonorrhea, chlamydia, and human immunodeficiency virus (HIV)/acquired immunodeficiency virus. Results: Between November 2003 and June 2004, 9 Hot Shot! events were held throughout NYC. Services delivered at events included STD/HIV screening; relevant adult vaccinations, cardiovascular health screenings; and mental health, tobacco, and other drug use assistance. Of 1634 attendees, 445 persons accessed ≥1 service; 4 persons were newly diagnosed with syphilis and 7 with HIV. Conclusions: The Hot Shot! approach to syphilis control can facilitate STD education, screening, and treatment of MSM while addressing comprehensive health issues. Future integrated health service delivery programs may be more successful by using stable venues for events to ensure continuity of care for MSM.

The importance of both sexual behavior and identity.

Background: Prevention providers wonder whether benefits achieved in the original, researcher-led, efficacy trials of interventions are replicated when the intervention is delivered in real-world settings by their agencys staff. Methods: A replication study was conducted at 2 public sexually transmitted disease (STD) clinics (New York City and San Juan, PR). Using a controlled trial design, intervention (VOICES/VOCES) and comparison conditions (regular clinic services) were assigned in alternating 4-week blocks. Trained agency staff delivered the intervention. Effectiveness was assessed for incident STDs, redemption of coupons for condoms at neighborhood location after the visit, and improved knowledge and attitudes about STDs and condoms. Results: A total of 3365 patients were recruited, completed the protocol, and followed through STD surveillance systems for an average of 17 months. Of 397 with an incident infection, 226 (13.4%) were among those enrolled during comparison blocks; 171 were among those in the intervention condition (10.2%). Controlling for site and gender, participants enrolled during intervention blocks were significantly less likely to have an incident STD reported to the surveillance system (hazard ratio, 0.78; 95% confidence interval, 0.64–0.96). Intervention block participants scored higher on scales of STD knowledge (4.89 vs. 3.87, P < 0.001) and condom knowledge, attitude, and efficacy (10.98 vs. 9.16, P < 0.001). More of those exposed to VOICES/VOCES redeemed condoms (P < 0.05). Positive effects were more consistent in New York, which may be related to fidelity of implementation. Conclusions: A packaged human immunodeficiency virus prevention intervention can be delivered by agencies, with benefits similar to those achieved in the research setting.