MSM In Lima Research Articles

Sexual network characteristics, condomless anal intercourse, and the HIV care cascade among MSM living with controlled versus uncontrolled HIV infection in Lima, Peru: a population-based cross-sectional analysis

Despite high rates of HIV transmission among men who have sex with men (MSM) in Lima, Peru, limited data exist on the sexual network characteristics or risk factors for secondary HIV transmission among MSM with uncontrolled HIV infection. We report the frequency of serodiscordant, condomless anal intercourse (CAI) and associated sexual network characteristics among MSM in Lima with detectable HIV viremia and compare to those with undetectable viremia. This cross-sectional analysis includes MSM who tested positive for HIV-1 during screening for a trial of partner management and STI control (June 2022-January 2023). Participants were tested for HIV, gonorrhoea, chlamydia, and syphilis, and completed questionnaires on their demographic characteristics, sexual identity and behaviour, sexual network structures and engagement in HIV care. Of 665 MSM, 153 (23%) had detectable (>200 copies/mL) viremia. 75% (499/662) of men living with HIV were previously diagnosed, with 94% (n=469/499) reporting that they were on ART, and 93% (n=436/469) virally suppressed. 96% (n=147/153) of men with detectable viremia reported serodiscordant CAI with at least one of their last three sexual partners, and 74% (n=106/144) reported the same with all three of their recent partners. In contrast, 62% (n=302/489) of men with undetectable viral load reported serodiscordant CAI with all of their last three partners (p<0.01). 23% of men living with HIV in Peru had detectable viremia, of whom almost all (96%) reported recent serodiscordant CAI. The primary gap in the HIV care cascade lies in awareness of HIV serostatus, suggesting that improved access to HIV testing could be a key prevention strategy in Peru. Funding for this study was provided by NIH/NIMH grants R01 MH118973 (PI: Clark) and R25 MH087222 (PI: Clark).

1517. Sexual Network Characteristics of MSM with Detectable Viremia Living with HIV in Lima, Peru

Abstract Background In Lima, Peru, the HIV epidemic is concentrated among men who have sex with men (MSM) and transgender women (TW). Few data exist on the sexual network characteristics of MSM with detectable HIV-1 viremia, yet these networks have important implications to control transmission. We report data on frequency of sero-discordant, condomless anal intercourse (CAI) among MSM in Lima with detectable viremia. Methods This cross-sectional secondary analysis includes MSM screened for a STI trial in Lima, Peru between June 2022 and January 2023. Participants completed questionnaires on demographics, sexual identity and role, and sexual network characteristics. Participants were screened for HIV infection and those who tested positive were included and HIV-1 RNA was measured. Descriptive and comparative statistics are reported for those with detectable and undetectable viremia. Results 665 MSM with HIV were included. 153 (23%) had detectable ( &amp;gt;200 copies/mL) viremia. Among those with detectable viremia, the median (IQR) age was 29 (25, 35) years. 70% identified as homosexual and 57% identified their sexual role during intercourse as “moderno” or “versatil”. The median (IQR) number of sexual partners in the last 3 months was 15 (5,20). 55/153 (35.6%) of the detectable group were aware of their HIV diagnosis, 33/55 (60%) reported being on anti-retroviral therapy (ART) and 15/32 (47%) believed they were virally suppressed. Among all participants living with HIV, 499/662 (75%) were aware of their HIV status, 469/499 (94%) reported to be on ART and 436/469 (93%) were virally suppressed. 147/153 (96%) of men with detectable viremia reported sero-discordant CAI with at least one of their last three sexual partners, and 106/144 (74%) reported this with all three of their last partners. In the undetectable group, 302/489 (62%) reported sero-discordant CAI with all three of their last partners (p &amp;lt; 0.01). Conclusion In this sample of MSM living with HIV in Lima, Peru, almost all men with detectable HIV-1 viremia reported sero-discordant CAI, more often than those with undetectable viremia. The primary gap in the HIV care cascade was participant awareness of their HIV status, suggesting that broader HIV testing and improved access to resources for secondary HIV prevention are key objectives in Peru. Disclosures Jordan Lake, MD, Gilead Sciences: Grant/Research Support|Theratechnologies: Advisor/Consultant

Exploring Contextual Differences for Sexual Role Strain Among Transgender Women and Men Who Have Sex with Men in Lima, Peru.

Sexual and gender politics inform relational expectations surrounding sexual experiences of Peruvian transgender women (TW) and men who have sex with men (MSM). We used the framework of sexual role strain, or incongruence between preferred sexual role and actual sexual practices, to explore potential conflicts between personally articulated identities and externally defined norms of gender and sexuality and its potential to increase HIV/STI risk. Cross-sectional individual- and dyad-level data from 766 TW and MSM in Lima, Peru were used to assess the partnership contexts within which insertive anal intercourse was practiced despite receptive role preference (receptive role strain), and receptive anal intercourse practiced despite insertive role preference (insertive role strain). Sexual role strain for TW was more common with non-primary partners, while for MSM it occurred more frequently in the context of a primary partnership. Receptive role strain was more prevalent for TW with unknown HIV status (reference: without HIV) or pre-sex drug use (reference: no pre-sex drug use). For homosexual MSM, receptive role strain was more prevalent during condomless anal intercourse (reference: condom-protected) and with receptive or versatile partners (reference: insertive). Among heterosexual or bisexual MSM, insertive role strain was more prevalent with insertive or versatile partners (reference: receptive), and less prevalent with casual partners (reference: primary). Our findings suggest TW and MSM experience different vulnerabilities during sexual role negotiation with different partner-types. Future studies should explore the impact of sexual role strain on condom use agency, HIV/STI risk, and discordances between public and private presentations of gender and sexual orientation.

HIV transmission patterns among transgender women, their cisgender male partners, and cisgender MSM in Lima, Peru: A molecular epidemiologic and phylodynamic analysis

SummaryBackgroundTransgender women (TW) in Peru are disproportionately affected by HIV. The role that cisgender men who have sex with TW (MSTW) and their sexual networks play in TW’s risk of acquiring HIV is not well understood. We used HIV sequences from TW, MSTW, and cisgender men who have sex with men (MSM) to examine transmission dynamics between these groups.MethodsWe used HIV-1 pol sequences and epidemiologic data collected through three Lima-based studies from 2013 to 2018 (n = 139 TW, n = 25 MSTW, n = 303 MSM). We identified molecular clusters based on pairwise genetic distance and used structured coalescent phylodynamic modeling to estimate transmission patterns between groups.FindingsAmong 200 participants (43%) found in 62 clusters, the probability of clustering did not differ by group. Both MSM and TW were more likely to cluster with members of their own group than would be expected based on random mixing. Phylodynamic modeling estimated that there was frequent transmission from MSTW to TW (67·9% of transmission from MSTW; 95%CI = 52·8–83·2%) and from TW to MSTW (76·5% of transmissions from TW; 95%CI = 65·5–90·3%). HIV transmission between MSM and TW was estimated to comprise a small proportion of overall transmissions (4·9% of transmissions from MSM, and 11·8% of transmissions from TW), as were transmissions between MSM and MSTW (7·2% of transmissions from MSM, and 32·0% of transmissions from MSTW).InterpretationThese results provide quantitative evidence that MSTW play an important role in TW’s HIV vulnerability and that MSTW have an HIV transmission network that is largely distinct from MSM.

Sex-on-premise venues, associated risk behaviors, and attitudes toward venue-based HIV testing among men who have sex with men in Lima, Per\xfa

BackgroundIn Perú, HIV disproportionately affects men who have sex with men (MSM). Despite widespread access to treatment, the high rate of new HIV infections has remained unchanged over the last decade. Low knowledge of HIV status associated with late diagnosis is a key factor underlying the high HIV incidence observed in this setting, creating conditions for efficient onward transmission. Improving access to HIV testing and prevention services for those at highest risk is an important public health priority. Sex-on-premise venues (SOPVs) – saunas, sex clubs, pornographic movie theaters, hourly hotels, and bars/discos with areas where sex is permitted – may be opportune sites for outreach; however, further research on SOPVs and the populations who frequent them is needed to inform such efforts.MethodsWe conducted a cross-sectional online survey of adult MSM in Lima, Perú to evaluate patterns of SOPV attendance, associated sexual risk behaviors, and attitudes toward SOPV-based interventions. Participants were recruited through outreach to social media networks affiliated with local LGBTQ-aligned community groups. Our primary analytic objective was to estimate the association of HIV-related sexual risk behaviors and SOPV attendance. Additionally, we performed exploratory analyses to describe risk behavior stratified by SOPV category and to examine the relationship between SOPV attendance and the use of online platforms to meet sex partners.ResultsOverall, 389 MSM completed the survey from November 2018 through May 2019, of whom 68% reported attending an SOPV in the last 3 months. SOPV attendance was associated with multiple sexual risk behaviors, including transactional sex, group sex, substance use around the time of sex, and higher number of partners. Over two thirds of SOPV attendees indicated they would accept HIV testing if offered at SOPVs.ConclusionsSOPV attendance was common among MSM in Lima who participated in our survey, and SOPV attendees reported significantly greater engagement in sexual risk behaviors related to HIV transmission. Attitudes toward hypothetical SOPV-based interventions were generally favorable. These findings suggest that outreach at SOPVs may be an effective mechanism for reaching a particularly high-risk sub-population of MSM in Perú to deliver targeted HIV testing and prevention interventions.

1253. Sex-on-Premise Venue (SOPV) Attendance Among Men Who Have Sex with Men (MSM) in Lima, Perú: Results From a Cross-Sectional Web-Based Survey

BackgroundIn Perú, where the HIV epidemic is concentrated among men who have sex with men (MSM), incidence has not changed appreciably over the last decade despite the rapid scale-up of free antiretroviral treatment (ART). New strategies for delivering effective HIV testing and prevention services to at-risk populations are greatly needed. Because most adult MSM in Perú live at home with family where it may be difficult to bring new sex partners, sex-on-premise venues (SOPVs)—such as saunas, sex clubs, and hourly hotels—might represent opportune sites at which to offer targeted HIV testing and prevention interventions.MethodsFrom November 26, 2018 through April 15, 2019 we conducted a cross-sectional web-based survey using REDCap to assess the prevalence of SOPV attendance and associated sexual risk behaviors among MSM in Lima, Perú. SOPVs were defined as saunas, sex clubs, adult movie theaters, hotels, or bars/discos known to permit sex. We recruited participants by disseminating an anonymous survey link through local gay social media networks, with no monetary incentive to complete the survey. We asked participants how/where they met any sex partners from the prior 3 months, where they went for sex, and about HIV-associated sexual risk factors, including self-reported HIV status. We used the Pearson chi-squared test and Student’s t-test to assess whether the frequency of sexual risk behaviors differed based on SOPV attendance.ResultsAmong n = 324 cis-gender MSM completing the survey, 16% identified as bisexual. Median age was 30 years, 62% lived at home with family, 50% had a university education or higher, and 29% reported being HIV+. 65% of respondents reported attending an SOPV to meet a partner and/or have sex in the prior 3 months. SOPV attendees were significantly more likely to report transactional sex, group sex, sex under the influence of alcohol, popper use, and have a higher number of sex partners (table).ConclusionSOPV attendance is common among MSM in Lima and associated with higher levels of several sexual behavioral risk factors. In light of this, SOPVs warrant further consideration as potential sites of outreach to offer HIV testing and prevention interventions designed to reach MSM at high risk for HIV infection. Disclosures All authors: No reported disclosures.

Brief Report: Comparing Sexual Risk Behavior in a High-Risk Group of Men Who Have Sex With Men and Transgender Women in Lima, Peru

Transgender women (TW) and men who have sex with men (MSM) are often conflated in HIV research and prevention programs, despite clear differences that exist in culture and behavior. We examined baseline data from a large treatment-as-prevention study among TW and MSM in Lima, Peru, to assess differences in risk behavior. Baseline assessment included HIV testing and a questionnaire including sociodemographics, sexual behavior, social venue attendance, and drug and alcohol use. Poisson regression with robust standard errors was used to calculate prevalence ratios adjusted for confounding variables [adjusted prevalence ratio (aPR)] and 95% confidence intervals (CIs) comparing the prevalence of covariates related to HIV risk in MSM and TW. Overall, 310 TW and 2807 MSM participated between July 2013 and September 2015 and were included in this analysis. TW engaged in some protective sexual health practices more than MSM, including HIV testing in the last year (aPR = 1.62; 95% CI: 1.42 to 1.84) and condom use at the last sexual encounter (aPR = 1.20; 95% CI: 1.06 to 1.36). TW were more likely to have sex while using alcohol (aPR 1.15, 95% CI: 1.01 to 1.31) or drugs (aPR 2.24, 95% CI: 1.47 to 3.41), have alcohol dependency (aPR 1.38, 95% CI: 1.15 to 1.66), engage in receptive anal sex (aPR 1.31, 95% CI: 1.26 to 1.36), and have received money, gifts, or favors in exchange of anal sex (1.96, 95% CI: 1.74 to 2.20). TW and MSM exhibited distinct risk profiles, suggesting that interventions specifically targeted to each group may provide new opportunities for more effective HIV prevention programs.

Body Parts Matter: Social, Behavioral, and Biological Considerations for Urethral, Pharyngeal, and Rectal Gonorrhea and Chlamydia Screening Among MSM in Lima, Peru.

Gonorrhea (Neisseria gonorrhoeae [GC]) and chlamydia (Chlamydia trachomatis [CT]) disproportionately affect men who have sex with men (MSM), and public health implications vary by anatomic site and bacterial agent. Urethral and rectal GC and CT can increase risk of HIV transmission, whereas pharyngeal GC may be a reservoir for antimicrobial resistance. To define screening priorities in Latin America, we compare differences in the prevalence and correlates of urethral, pharyngeal, and rectal GC and CT among MSM in Peru. A cross-sectional sample of 787 MSM from Lima was screened between 2012 and 2014. We described prevalence of urethral, pharyngeal, and rectal GC and CT infection and conducted bivariate analyses of associations with social, behavioral, and biological characteristics. Poisson regression analyses assessed the correlates of each infection at each anatomic site. The most commonly symptomatic infection (urethral GC; 42.1%) was the least prevalent (2.4%). The most prevalent infections were rectal CT (15.8%) and pharyngeal GC (9.9%). Rectal CT was the least commonly symptomatic (2.4%) infection, and was associated with younger age (adjusted prevalence ratio [95% confidence interval], 0.96 [0.94-0.98]), HIV infection (1.46 [1.06-2.02]), and pasivo (receptive; 3.59 [1.62-7.95]) and moderno (versatile; 2.63 [1.23-5.60]) sexual roles. Results highlight limitations of current syndromic screening strategies for sexually transmitted diseases in Peru, wherein urethral CT and rectal GC and CT may be missed due to their frequently asymptomatic presentations. Successful management of GC and CT infections among MSM in low-resource settings requires differentiating between bacterial agent, symptomatic presentation, associated risk factors, and public health implications of untreated infection at different anatomic sites.

HPV knowledge, burden and genital wart location among heterosexually identified versus homosexually identified men who have sex with men in Lima, Peru: cross-sectional results from a cohort study

ObjectivesThe relationship between sexual practices, identity and role among Latino men who have sex with men (MSM) and HIV risk is the subject of ongoing investigation but less is known...

Expedited Partner Therapy (EPT) increases the frequency of partner notification among MSM in Lima, Peru: a pilot randomized controlled trial

BackgroundExpedited Partner Therapy (EPT) has been shown to improve treatment outcomes among heterosexual partners of individuals with curable sexually transmitted infections (STIs). Although the use of EPT with men who have sex with men (MSM) has been debated, due to the potential for missed opportunities to diagnose unidentified cases of HIV and syphilis infection in symptomatic partners, increases in partner notification (PN) resulting from use of EPT may promote testing and treatment of otherwise unidentified partners. We assessed the impact of EPT on self-reported PN among MSM in Peru with gonorrheal (GC) and/or chlamydial (CT) infection.MethodsWe enrolled 173 MSM in Lima, Peru with symptomatic or asymptomatic GC and/or CT infection between 2012 and 2014. We enrolled 44 MSM with symptomatic urethritis/proctitis and 129 MSM with asymptomatic GC/CT infection, diagnosed based on nucleic acid testing (Aptima Combo 2 Transcription-Mediated Amplification [TMA]) from urethral, pharyngeal, and rectal sites. Eligible participants were randomly assigned to receive either standard PN counseling (n = 84) or counseling plus EPT (cefixime 400 mg/azithromycin 1 g) for up to five recent partners (n = 89). Self-reported notification was assessed by computer-assisted self-administered survey among 155 participants who returned for 14-day follow-up.ResultsThe median age of participants was 26 (interquartile range [IQR]: 23–31) with a median of 3 sexual partners (IQR: 2–4) in the previous 30-day period. Among all participants, 111/155 (71.6%) notified at least one partner at 14-day follow-up with a median of 1 partner notified per participant (IQR: 0–2). For participants randomized to receive EPT, 69/83 (83.1%) reported notifying at least one partner, compared with 42/72 (58.3%) of participants in the control arm (odds ratio = 3.52; 95% confidence interval [CI]: 1.68–7.39). The proportion of all recent partners notified was significantly greater in the EPT than in the control arm (53.5%, 95% CI: 45.0–62.0% versus 36.4%, 95% CI: 27.0–47.4%).ConclusionsProvision of EPT led to significant increases in notification among Peruvian MSM diagnosed with GC/CT infection. Additional research is needed to assess the impact of EPT on biological outcomes, including persistent or recurrent infection, antimicrobial resistance, and HIV/STI transmission, in MSM sexual networks.Trial registrationClinicalTrials.gov, NCT01720654. Registered on 10/29/2012.

O11.1 Patient-delivered partner therapy (pdpt) increases the frequency of partner notification among msm in lima, peru: a randomised clinical trial

Background Patient-Delivered Partner Therapy (PDPT) improves treatment outcomes among sexual partners of individuals with curable STIs. Although use of PDPT with MSM has been questioned due to the high prevalence of undiagnosed HIV and syphilis in MSM networks, increasing partner notification (PN) through PDPT may promote testing and treatment of otherwise unidentified partners. We assessed the impact of PDPT on self-reported partner notification (PN) among Peruvian MSM with gonorrheal (GC) and/or chlamydial (CT) infection. Methods We screened 898 MSM in Lima, Peru for GC and/or CT between 2012–2014. Screening included syndromic management of urethritis/proctitis and nucleic acid testing for GC/CT at urethral, pharyngeal, and rectal sites (Aptima Combo-2 TMA). Enrollment was limited to participants with symptomatic urethritis/proctitis (n = 44) and/or laboratory-diagnosed GC/CT infection (n = 263). 173 eligible participants were randomly assigned to receive either standard PN counselling (n = 84) or counselling and PDPT (Cefixime 400 mg/Azithromycin 1 g) for up to 5 recent partners (n = 89). Self-reported notification of recent partners was assessed by CASI with 155 participants who returned for 14-day follow-up. Results The median age of all enrolled participants was 26 (IQR: 23–31), with a median of 3 (IQR: 2–4) partners reported during the previous 30-day period. Among all participants completing follow-up, 111/155 (71.6%) notified at least one partner, with a median of 1 partner notified per participant (IQR: 0–2). For participants randomised to receive PDPT, 69/83 (83.1%) reported notifying at least one partner, compared with 42/72 (58.3%) of participants in the control arm (p = 0.001). The proportion of all recent partners notified was significantly greater in the PDPT than the Control arm (53.5% vs. 36.4%; p = 0.004). Conclusions Provision of PDPT led to significant increases in notification among Peruvian MSM diagnosed with GC/CT infection. Additional research is needed to assess the impact of PDPT on biological outcomes of HIV/STI transmission in MSM sexual networks.

Problem drinking is associated with increased prevalence of sexual risk behaviors among men who have sex with men (MSM) in Lima, Peru

BackgroundAlcohol use is an important but understudied HIV risk factor among men who have sex with men (MSM), particularly in Latin America. We studied the relationship between problem drinking and sexual risk among MSM in Lima, Peru. MethodsWe recruited 718 participants from 24 neighborhoods for a study on sexually transmitted infections and community-building among MSM. Multivariate analysis was used to identify factors independently associated with problem drinking, which was defined via the CAGE Questionnaire. ResultsOf 718 participants, 58% met criteria for problem drinking. In univariate analysis, problem drinkers were significantly more likely to report failing to always use condoms, use alcohol or drugs prior to their most recent sexual encounter, report a history of sexual coercion and to engage in transactional sex. Problem drinkers also reported significantly higher numbers of recent and lifetime sexual partners. In multivariate analysis, factors independently associated with problem drinking included a history of sexual coercion [OR 1.8 95%, CI 1.2–2.6], having consumed alcohol prior to the most recent sexual encounter [OR 2.1 95%, CI 1.5–2.9], receiving compensation for sex in the last six months [OR 1.6, 95% CI 1.1–2.2] or having reported a prior HIV+ test [OR 0.5, 95% CI 0.2–0.9]. DiscussionWe found a high prevalence of problem drinking among MSM in Lima, Peru, which was associated with increased sexual risk in our study. Of note, individuals who were already HIV-infected were less likely to be problem drinkers. Further studies and targeted interventions to reduce problem drinking among MSM are warranted.

Frequency, patterns, and preferences of lubricant use during anal intercourse within male sexual partnerships in Lima, Peru: Implications for a rectal microbicide HIV prevention intervention

Understanding current practices of lubricant use during anal intercourse can help to assess the contexts for the introduction of topical rectal microbicides as an HIV prevention tool for men who have sex with men (MSM). We used quantitative and qualitative methods to assess: current patterns of lubricant use; preferred characteristics of commercial lubricant formulations; and social and behavioral contexts of lubricant use within male sexual partnerships in Lima, Peru. Between 2007 and 2008, we conducted a quantitative behavioral survey with 547 MSM followed by qualitative individual and group interviews with 36 MSM from Lima, Peru. Approximately half of all participants in the quantitative survey (50.3%) reported using commercial lubricant during intercourse occasionally or consistently during the preceding two months, with lack of availability at the time of intercourse the most commonly reported reason for non-use. No clear preferences regarding the color, smell, taste, or viscosity of commercial lubricants were identified, and all participants who reported using a commercial lubricant used the same product (“Love-Lub”). In the qualitative analysis, participants characterized lubricant use as a sexual practice consistently controlled by the receptive partner, who typically obtained and applied lubricant independently, with or without the consent of the insertive partner. Quantitative findings supported this differential pattern of lubricant use, with men who reported sexual identities or roles consistent with receptive anal intercourse, including unprotected receptive intercourse, more likely to report lubricant use than MSM who claimed an exclusively insertive sexual role. Given the social, behavioral, and biological factors contributing to increased vulnerability for HIV and STI acquisition by the receptive partner in anal intercourse, delivery of a topical rectal microbicide as a lubricant formulation could provide an important HIV prevention resource for at-risk MSM in Lima, Peru.

Moderno Love: Sexual Role-Based Identities and HIV/STI Prevention Among Men Who Have Sex with Men in Lima, Peru

Role-based sexual identities structure male same-sex partnerships and influence HIV/STI epidemiology among MSM in Latin America. We explored shifting relationships between sexual roles, identities and practices among MSM in Lima, Peru, and implications for HIV/STI prevention. Patterns of HIV/STI epidemiology reflected differential risks for transmission within role-based partnerships with relatively low prevalences of HIV, syphilis, and HSV-2 but higher prevalences of urethral gonorrhea/chlamydia among activo MSM compared with moderno and pasivo participants. Qualitative analysis of how MSM in Peru integrate sexual identities, roles, and practices identified four key themes: pasivo role as a gay approximation of cultural femininity; activo role as a heterosexual consolidation of masculinity; moderno role as a masculine reconceptualization of gay identity; and role-based identities as social determinants of partnership, network, and community formation. The concept of role-based sexual identities provides a framework for HIV prevention for Latin American MSM that integrates sexual identities, practices, partnerships, and networks.

Using Conjoint Analysis to Measure the Acceptability of Rectal Microbicides Among Men Who Have Sex with Men in Four South American Cities

Conjoint Analysis (CJA), a statistical market-based technique that assesses the value consumers place on product characteristics, may be used to predict acceptability of hypothetical products. Rectal Microbicides (RM)-substances that would prevent HIV infection during receptive anal intercourse-will require acceptability data from potential users in multiple settings to inform the development process by providing valuable information on desirable product characteristics and issues surrounding potential barriers to product use. This study applied CJA to explore the acceptability of eight different hypothetical RM among 128 MSM in Lima and Iquitos, Peru; Guayaquil, Ecuador; and Rio de Janeiro, Brazil. Overall RM acceptability was highest in Guayaquil and lowest in Rio. Product effectiveness had the greatest impact on acceptability in all four cities, but the impact of other product characteristics varied by city. This study demonstrates that MSM from the same region but from different cities place different values on RM characteristics that could impact uptake of an actual RM. Understanding specific consumer preferences is crucial during RM product development, clinical trials and eventual product dissemination.

High HIV and Ulcerative Sexually Transmitted Infection Incidence Estimates Among Men Who Have Sex With Men in Peru: Awaiting for an Effective Preventive Intervention

In the Andean Region, HIV and sexually transmitted infections (STI) are most prevalent among men who have sex with men (MSM), but incidence estimates and associated factors have never been prospectively assessed. A cohort of 1,056 high-risk HIV-negative MSM in Lima, Peru, were recruited during 1998-2000 (the ALASKA Cohort), and a nested case-control analysis was conducted between seroconverters and nonseroconverters, matched 1:3 by age and duration of follow-up for comparison of risk behaviors, acute retroviral symptoms, circumcision, and STI. During average follow-up of 335 days, 34 men seroconverted, providing a HIV incidence estimate of 3.5 per 100 person-years [95% confidence interval (CI): 2.3 to 4.7]. High syphilis (8.4 per 100 person-years, 95% CI: 6.7 to 10.1) and herpes simplex virus type 2 (HSV-2) infection (10.4 per 100 person-years, 95% CI: 8.6 to 11.9) incidence estimates were obtained. HIV seroconverters were more likely than men who remained seronegative to report fever >or=3 days (46% vs. 7%), to seek medical care (62% vs. 27%), and to have >or=1 casual partner (86.2% vs. 74.1%) since their last visit. HIV seroconverters also were more likely to have acquired syphilis or HSV-2 infection (31% vs. 8% among initially HSV-2-seronegative men) although they were less likely to be circumcised (4.2% vs. 20.6%, a nonsignificant difference). In multivariate analysis, incident syphilis or HSV-2 infection (odds ratio [OR]: 5.9, 95% CI: 1.5 to 22.7) and sex with any casual partner (OR: 4.8, 95% CI: 0.9 to 26.2) were associated with HIV seroconversion. STI that may cause anogenital ulcers are important risk factors for HIV acquisition among high-risk MSM in Lima, a population with a very high HIV incidence estimate. Synergistic interventions focusing in preventing both HIV and HSV-2, like male circumcision, are warranted to be assessed, especially in MSM populations with low levels of circumcision and high incidence estimates of ulcerative STI.

Prevalence and Correlates of Human Herpesvirus 8 Infection Among Peruvian Men Who Have Sex With Men

Infection with human herpesvirus 8 (HHV-8) is common among men who have sex with men (MSM) in North America and Europe and is also found to be endemic in some regions of South America. Little is known about HHV-8 prevalence and its correlates among MSM in the Andean region. We assessed HHV-8 seroprevalence among 497 MSM recruited for the 2002 Peruvian HIV sentinel surveillance program using a combined HHV-8 enzyme immunoassay and immunofluorescence assay algorithm. Logistic regression analysis was used to estimate odds ratios (ORs) and their 95% confidence intervals (CIs) to determine the association between selected covariates and HHV-8 seropositivity. One hundred thirty-one (66.5%, 95% CI 63.1% to 69.9%) of 197 HIV-infected and 80 (26.7%, 95% CI 24.4% to 29.0%) of 300 HIV-uninfected MSM had serologic evidence of HHV-8 infection. Factors independently associated with HHV-8 infection were education<12 years (OR 1.7, 95% CI 1.1 to 2.7), anal receptive sex with the last partner (OR 2.0, 95% CI 1.2 to 3.3), self-reported sexually transmitted infection symptoms during the last year (OR 1.9, 95% CI 1.2 to 3.0), coinfection with HIV (OR 4.2, 95% CI 2.8 to 6.4) and chronic hepatitis B (OR 4.9, 95% CI 1.5 to 15.8). MSM with long-standing HIV infection were more likely to have serologic evidence of HHV-8 infection when compared with men with recently acquired HIV (OR 3.8, 95% CI 1.7 to 9.1). HHV-8 infection is common among both HIV-infected and HIV-negative MSM in Lima, Peru. HHV-8 seropositivity is correlated with anal receptive sex, self-reported sexually transmitted infection symptoms, and HIV infection among these MSM and thus seems to be sexually transmitted. HHV-8 infection seems to be acquired after HIV infection, suggesting that future studies should evaluate the mode of HHV-8 transmission and prevention strategies among HIV-uninfected MSM.

HIV-1, Sexually Transmitted Infections, and Sexual Behavior Trends Among Men Who Have Sex With Men in Lima, Peru

To assess and estimate trends in HIV, sexually transmitted infections (STIs), and sexual behavior among men who have sex with men (MSM) in Lima, Peru. Second-generation HIV sentinel surveillance surveys conducted in 1996, 1998, 2000, and 2002. Adult men reporting sex with at least 1 man during the previous year were eligible to participate. Sexual behavior and serum HIV-1 and syphilis antibodies were assessed. HIV seroincidence was estimated by a sensitive/less-sensitive enzyme immunoassay strategy. Rectal and pharyngeal swabs for Neisseria gonorrhoeae culture and a first-void urine sample for urethral leukocytes for presumptive diagnosis of urethritis were obtained. Herpes simplex virus 2 (HSV-2) antibodies were measured in 2002. Although HIV prevalence increased from 18.5% to 22.3% from 1996 through 2002, bacterial prevalence declined significantly for syphilis (16.0% to 12.4%), early syphilis (8.6% to 3.4%), and rectal gonorrhea (5.1% to 0.2%). High HIV seroincidence was estimated, with the lowest (4.8%) incidence in 1998. In 2002, HSV-2 seroprevalence was 51.0%. After adjustment for age, education, and self-reported sexual identity, our data suggest that a yearly increase by 6% in the prevalence of HIV occurred among MSM in Lima, with a corresponding decline in syphilis (by 9%), early syphilis (by 18%), and rectal gonorrhea (by 64%). Condom use during last sexual intercourse increased by 26% each year with the most recent male steady partner and, among non-sex workers, by 11% with the most recent casual partner. HIV continued to spread among MSM in Lima even when a decline in bacterial STIs and increase in condom use were estimated to occur. Intensification of medical and behavior prevention interventions is warranted for MSM in Peru.

Sexual Role and Transmission of HIV Type 1 among Men Who Have Sex with Men, in Peru

In Latin America, men who have sex with men (MSM) have traditionally practiced role segregation--that is, the adoption of a fixed role (insertive or receptive) rather than a versatile role (both practices) during anal sex. Previous modeling has shown that role segregation may yield a lower incidence of human immunodeficiency virus (HIV) type 1 infection, compared with role versatility; however, the modeling assumed no risk of acquiring HIV-1 during insertive sex, which is now recognized as unlikely. We reexamine the issue by use of a deterministic model incorporating bidirectional transmission and data from a cohort study of MSM in Lima, Peru, to demonstrate the potential effects of role segregation on the trajectory of the HIV-1 epidemic. In Lima, 67% of MSM reported segregated roles in their recent male partnerships. A population of MSM with identical contact rates but complete role versatility would have twice the prevalence of HIV-1 infection throughout the epidemic's first 3 decades. Preferential mixing among versatile MSM does not change overall prevalence but affects which individuals become infected.

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

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'). Cross-sectional study of MSM in Lima, Peru. 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. 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%). 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.