The resurgence of syphilis among men who have sex with men

PURPOSE OF REVIEW: To identify recent progress and emerging problems in addressing syphilis among men who have sex with men. RECENT FINDINGS: A resurgence of syphilis has occurred among men who have sex with men in many developed countries. Infection has been associated with HIV coinfection, multiple partners, and recreational drug use. Unlike HIV, oral sex appears to be a common route of syphilis transmission. Many prevention approaches have shown, at best, modest success. Variable clinical presentation and potentially inconclusive lab tests make diagnosis confusing. SUMMARY: As the infection remains relatively rare, clinicians treating men who have sex with men should maintain a high index of suspicion for syphilis lesions, and should screen their sexually active patients for latent disease. Debates about syphilis control and treatment continue. The clinical manifestations, serologic responses, efficacy of treatment, and complications of syphilis have always been complicated. HIV coinfection adds to the confusion.     

男男性行为人群甲型肝炎流行情况研究进展

[摘要]?甲型肝炎（甲肝）是由甲肝病毒（hepatitis A virus, HAV）引起的急性病毒性肝炎,主要经粪-口途径传播。自20世纪末甲肝疫苗出现,全球不同国家和地区甲肝发病率大大降低。但近年欧洲许多国家和美洲、亚洲、大洋洲的一些国家或地区均发生甲肝暴发,主要发病的人群为男男性行为者（men who have sex with men, MSM）,不同国家和地区MSM人群的HAV毒株存在关联,引起广泛关注。本文对甲肝在MSM人群中的流行情况进行综述,并探讨相关防控措施。     

Global epidemiology of HIV infection in men who have sex with men

Epidemics of HIV in men who have sex with men (MSM) continue to expand in most countries. We sought to understand the epidemiological drivers of the global epidemic in MSM and why it continues unabated. We did a comprehensive review of available data for HIV prevalence, incidence, risk factors, and the molecular epidemiology of HIV in MSM from 2007 to 2011, and modelled the dynamics of HIV transmission with an agent-based simulation. Our findings show that the high probability of transmission per act through receptive anal intercourse has a central role in explaining the disproportionate disease burden in MSM. HIV can be transmitted through large MSM networks at great speed. Molecular epidemiological data show substantial clustering of HIV infections in MSM networks, and higher rates of dual-variant and multiple-variant HIV infection in MSM than in heterosexual people in the same populations. Prevention strategies that lower biological transmission and acquisition risks, such as approaches based on antiretrovirals, offer promise for controlling the expanding epidemic in MSM, but their potential effectiveness is limited by structural factors that contribute to low health-seeking behaviours in populations of MSM in many parts of the world.     

Depression and anxiety among HIV-positive men who have sex with men and men who have sex with women in China

ABSTRACT

China is experiencing an emerging HIV epidemic among men who have sex with men (MSM). Minority stress theory posits that marginalized populations experience additional stress, which influences experiences of psychological distress and health outcomes. This study aimed to understand psychological distress of MSM relative to men who have sex with women (MSW) in an urban Chinese setting. Cross-sectional survey data were collected from 162 HIV-positive Chinese men receiving HIV treatment at Beijing’s Ditan Hospital. Multiple linear regression with imputation was used to identify correlates of psychological distress. Relative to MSW, MSM were younger, more educated, and less likely to be in a relationship or have children. While both groups reported clinically elevated levels of depression and anxiety, sexual behavior was not associated with either outcome. Higher endorsement of depression symptomology was associated with worse reported physical health (β?=??1.37, p?<?.05) and greater endorsement of maladaptive coping (β?=?2.39, p?<?.05), whereas higher endorsement of anxiety symptomology was associated with greater endorsement of adaptive coping (β?=?0.78, p?<?.05), diminished physical health (β?=??0.86, p?<?.05), and a high school or greater level of education (β?=?4.13, p?<?.05). These findings suggest that interventions targeting coping strategies may address psychological distress among HIV-positive Chinese men.     

Pre-exposure prophylaxis sorting among men who have sex with men

Factors such as race, masculinity, and sexually transmitted infections have been documented to influence partner selection in men who have sex with men (MSM). Pre-exposure prophylaxis (PrEP) has received mixed evaluations as a responsible step in HIV prevention and as an enabler of risker sexual practices. PrEP may consequently serve as an additional factor in partner choice. We examine the role that PrEP use and “promiscuity” play in affiliation and dating decisions by men who have sex with men with different HIV and PrEP stati. We invited 450 MSM across the United States from a smartphone geo-locating sex application to complete a survey of which 339 successfully finished the task. The survey contained vignettes of fictional men who were promiscuous or monogamous and either taking PrEP or not. Participants provided responses on whether to affiliate with these characters in three social domains: as friends, dates, or sex partners. Neither PrEP nor promiscuity influenced friendship choices. There was a preference for dating monogamous characters. Critically, PrEP influenced sexual affiliations for HIV negative individuals who showed a preference for PrEP-using characters. The pattern of results provides quantitative evidence for PrEP-based sexual sorting aimed at reducing risk of HIV transmission.     

Predictors of unprotected sex among men who have sex with men in Beijing, China

To estimate the prevalence of HIV and syphilis and to assess the predictors of unprotected anal intercourse (UAI) among men who have sex with men (MSM) in Beijing, a community-based survey recruited MSM in 2005 through internet advertisement, community outreach, and peer referral. Demographic, sexual, and HIV risk behavioral information were collected. Serospecimens were tested for HIV and syphilis infections. Of the 526 participants, 3.2% were HIV-positive, 11.2% syphilis-positive, 50% and 43.3% had UAI with regular and casual sex partners, respectively. Participants practicing UAI with regular male partners were independently associated with lower monthly income (adjusted odds ratio-AOR, 1.7; 95% CI, 1.0-3.0) and encountering male sex partners at bathhouses, public washrooms, and parks (AOR, 2.2; 95% CI, 1.0-4.9). Participants practicing UAI with casual male partners were associated with encountering male sex partners at bathhouses, publics washrooms, and park (AOR, 3.0; 95% CI, 1.8-5.2) and more male sex partners having receptive anal intercourse (AOR, 1.8; 95% CI, 1.1-2.9), and was inversely associated with receiving money for sex with men (AOR, 0.3; 95% CI, 0.2-0.7). Professional male sex workers were less likely to practice UAI in Beijing, suggesting the benefits of educational outreach to date. Further education, condom promotion, and prevention of sexually transmitted infections should be intensified urgently to combat the rising HIV epidemic among MSM in Beijing.     

Delay-discounting among homeless,out-of-treatment,substance-dependent men who have sex with men

Background: Impulsivity is associated with substance use; however, to date, impulsivity has not been characterized among a sample of homeless, non-treatment seeking, substance-dependent men who have sex with men (MSM). Objectives: The aim of this study was to utilize the delay-discounting instrument to assess impulsive behaviors among a subsample of homeless, non-treatment seeking, substance-dependent men who have sex with men (S-D MSM) enrolled in a randomized, controlled, contingency management (CM) trial. Methods: Twenty S-D MSM participants from the CM parent study were matched on age and ethnicity to 20 non-substance-dependent, non-homeless control participants using propensity scores (N = 40) and were administered the delay-discounting procedure. Results: Although discounting values decreased rapidly with time in both groups, the S-D MSM participants consistently discounted rewards more steeply than controls (p = .05), particularly at all intermediate measured timeframes. The S-D MSM participants also presented greater median discounting rates (k values) compared with the control group (m_{S-D MSM} = 2.39 (SD = 3.72) vs. m_ctrl = 1.27 (SD = 3.71), p ≤ .01). Conclusion: This work extends existing findings of increased delay-discounting among substance-dependent individuals to homeless, substance-dependent, non-treatment seeking MSM. Scientific Significance: A better understanding of the prevalence of delay-discounting type behaviors among homeless, substance-dependent MSM can be used to inform the development of tailored substance abuse interventions for this high-risk population.     

Risk of HIV infection attributable to oral sex among men who have sex with men and in the population of men who have sex with men

We examined HIV infection and estimated the population-attributable risk percentage (PAR%) for HIV associated fellatio among men who have sex with other men (MSM). Among 239 MSM who practised exclusively fellatio in the past 6 months, 50% had three partners, 98% unprotected; and 28% had an HIV-positive partner; no HIV was detected. PAR%, based on the number of fellatio partners, ranges from 0.10% for one partner to 0.31% for three partners. The risk of HIV attributable to fellatio is extremely low.     

Investigating partner abuse among HIV-positive men who have sex with men

High rates of partner abuse (PA) of all types—physical, sexual, and psychological—have been identified in studies of HIV-positive individuals. We examined both the prevalence and correlates of same-sex PA in HIV-positive men who have sex with men (MSM). Participants recruited from public outpatient HIV clinics (N = 168) completed CASI surveys about PA and current physical and mental health. Electronic medical record data were obtained for HIV biomarkers. Results indicate high rates of past year PA (physical, 19%; sexual, 17%; psychological, 51%; any, 54%), with rates comparable to, or higher than, those reported in recent studies of HIV-positive women and older studies of HIV-positive MSM. Overall, participants endorsing past year PA reported poorer mental but not physical health. Participants who endorsed past year physical PA, specifically, reported the largest number of mental health problems. HIV care providers should routinely assess PA, especially physical PA, in all MSM patients.     

Heterogeneity of risk among African-American men who have sex with men

The objective of this study was to examine the social mixing and sexual risk taking of African-American men who have sex with men (AAMSM). The design was a cross-sectional survey with targeted, ethnographically informed recruitment of respondents (n = 95), and subsequent recruitment of their network partners (n = 63). We ascertained current demographics, occupation, peer norms for sexual activity, community involvement, and information about members of their social and sexual network. Risk level was categorized by the frequency of anal sex and the consistency of condom use for anal sex. Twenty-nine of 158 (18.4%) persons were classified as being at high risk (any anal intercourse in the past three months with less than 100% condom use); 79 of 158 (50%) were at medium risk (any anal intercourse in the past three months with 100% condom use reported), and 50 (31.7%) were at low risk (no reported anal intercourse). The risk groups were similar with regard to perception of behavioural and community norms. White-collar workers associated predominantly with each other and other groups mixing preferentially with white-collar workers. Clustering within contact networks (the extent to which partners to a respondent know each other) was high for all risk groups (approximately 0.4-0.5), indicating dense, interactive networks. In conclusion, this study group demonstrates a greater degree of social mixing and heterogeneity than is commonly assumed for AAMSM. At least some portion of AAMSM has internalized public health messages about safer sexual activity. Intervention programmes should avoid the pitfalls of assumed homogeneity.     

Increased HIV incidence among men who have sex with men in Rome

Among 976 men who have sex with men (MSM) who had undergone repeat HIV testing between 1984 and 2003 at a sexually transmitted infection clinic in Rome, Italy, we observed a dramatic increase in HIV incidence in 2002 and 2003, with the cumulative incidence for 2000-2003 being twice as high as that for 1984-1995, and significantly higher than that for 1996-1999. This trend suggests the need for interventions aimed at encouraging behavioural changes among MSM.     

男男性行为人群队列保持的影响因素研究

目的探讨男男性行为人群(MSM)艾滋病病毒(HIV)血清学阳转的前瞻性队列保持影响因素。方法 2009年3-10月,在重庆市采用分类滚雪球的方法,招募HIV抗体检测阴性的MSM,2010年3月和9月分别进行两次随访调查,随访联系以移动电话和网络聊天工具通知为主,并在随访联系中逐一调查研究对象的失访情况。分析研究对象的社会人口学和行为学特征,以及对队列保持的影响。结果基线进入队列的453名MSM,有299人至少参加了一次随访,随访率为66.0%。单因素和多因素分析显示,年龄>25岁、本市居住时间>1年、近1年做过艾滋病检测与近6个月发生无保护男男肛交性行为和较高的保持率密切相关(P<0.05)。结论低年龄段、本地居住时间较短、近1年未做过艾滋病检测、近6个月未发生无保护男男肛交性行为的MSM,相比之下更不易保持在队列中,需要在MSM队列研究时引起注意。     

Self-reported sexually transmitted infections and their correlates among men who have sex with men in Norway: an Internet-based cross-sectional survey

Background  

The incidences of reportable sexually transmitted infections (STI) among men who have sex with men (MSM) have increased since the late 1990 s in Norway. The objectives of our study were to assess factors, associated with recent selected STI among MSM, living in Norway in order to guide prevention measures.     

HIV,syphilis and heterosexual bridging among Peruvian men who have sex with men

OBJECTIVES: To determine prevalence of and risk factors associated with HIV and syphilis seropositivity and estimate incidence of HIV infection among Peruvian men who have sex with men (MSM) and characterize behaviors of men who report sex with both men and women ('bridgers'). DESIGN: Cross-sectional study of MSM in Lima, Peru. METHODS: Four-hundred and fifty-one MSM (of whom 442 responded to the question regarding sexual orientation) recruited through street outreach. Each was interviewed and underwent serologic testing for syphilis and HIV, including the less sensitive enzyme immunoassay test to estimate HIV incidence. RESULTS: Overall, HIV and syphilis prevalence were 18.5% and 16.0%, respectively, with highest prevalence among cross-dressers (33.3% and 51.1%, respectively). The estimated overall HIV seroincidence was 11.2% per year (95% confidence interval, 4.8-23.6). Overall, 47.1% of men reported ever having sex with a woman: 78.6% of men self-identifying as heterosexuals, 85.1% of bisexuals, 35.5% of homosexuals, and 12.5% of cross-dressers. Of these, 26.5% were 'bridgers', of whom 55% reported two or more female partners during the last year. 'Bridgers' were less likely to have always used condoms during the past year for vaginal sex (17%) than for insertive anal sex with men (25.5%). CONCLUSIONS: Among MSM in Peru, HIV and syphilis prevalence and HIV incidence were high, especially among cross-dressers. The high prevalence of bisexuality and low rates of consistent condom use, especially with female sexual partners indicates potential HIV transmission into the heterosexual population.     

The spread of Mycoplasma genitalium among men who have sex with men

We report two instances of urethral-to-rectal transmission of Mycoplasma genitalium (MG) in men who have sex with men (MSM) couples. Such clear epidemiological correlation has to our knowledge not been published before. The urethral infections led to clinical symptoms, but the rectal infections did not. The rectum might serve as a reservoir for MG in MSM, but there is also some evidence from the literature that MG can cause proctitis. Our finding raises important questions about the role of MG as a pathogen among MSM. Any correlation with HIV transmission risk is currently unknown and needs further research.