High-risk sexual behavior by HIV-positive men who have sex with men--16 sites, United States, 2000-2002

The majority of persons living with human immunodeficiency virus (HIV) in the United States are men who have sex with men (MSM). High-risk sexual behavior by HIV-positive MSM exposes sex partners to HIV. The risk for transmitting HIV from an infected partner to an uninfected partner through unprotected insertive anal intercourse (UIAI) is greater than the risk for transmission through receptive anal intercourse or oral sex. Differences in sexual risk behavior might be associated with the perceived HIV serostatus of the partner (i.e., HIV positive, HIV negative, or unknown serostatus), as well as with the sex partner type (i.e., steady or nonsteady). During May 2000-December 2002, HIV-positive MSM were interviewed in a behavioral surveillance survey at surveillance sites in 16 states. This report describes insertive anal intercourse practices reported by these MSM; findings indicated that a large percentage of HIV-positive MSM were sexually abstinent, practiced safer sexual behavior by having protected insertive anal intercourse, or had UIAI with an HIV-positive partner. However, a small percentage of HIV-positive MSM reported UIAI with partners who were HIV negative or whose serostatus was unknown; for this group, more intensive and comprehensive HIV-prevention efforts are needed to eliminate this risk behavior.     

Sexual Risk Behavior of HIV-Positive Methamphetamine-Using Men Who Have Sex with Men: The Role of Partner Serostatus and Partner Type

This study examined the role of partner serostatus and partner type in relation to the sexual risk behaviors and disclosure practices of HIV-positive methamphetamine (meth)-using men who have sex with men (MSM). The sample consisted of 132 HIV-positive meth-using MSM who reported having both serodiscordant (i.e., HIV-negative and unknown serostatus) and seroconcordant (i.e., HIV-positive) partners. HIV-positive meth-using MSM engaged in significantly fewer acts of anal sex with serodiscordant partners as compared to seroconcordant partners. However, mean levels of unprotected anal and oral sex were high, and mean levels of protected sex were low for both seroconcordant and serodiscordant partners. Oral sex was practiced twice as often as anal sex; however, both types of sex were primarily unprotected. This pattern of risky sexual behavior was reported for steady, casual, and anonymous partners, regardless of partner serostatus. Despite high rates of unprotected sex, rates of HIV serostatus disclosure were consistently high for HIV-positive and HIV-negative steady, casual, and anonymous partners. However, rates of disclosure to unknown serostatus partners were low, particularly in relation to anonymous partners. Future research should address the reasons why HIV-positive meth-using MSM engage in risky sexual activity with serodiscordant partners, and HIV prevention programs for this population should emphasize the risks associated with unprotected sex with seroconcordant partners.     

Sexual Partnering and HIV Risk among Black Men Who Have Sex with Men: New York City

Black men who have sex with men (MSM) are disproportionately affected with HIV in the US. Limited event-specific data have been reported in Black MSM to help understand factors associated with increased risk of infection. Cross-sectional National HIV Behavioral Surveillance Study data from 503 MSM who reported ≥1 male sexual partner in the past year in New York City (NYC) were analyzed. Case-crossover analysis compared last protected and last unprotected anal intercourse (UAI). A total of 503 MSM were enrolled. Among 349 tested for HIV, 18% were positive. Black MSM (N = 117) were more likely to test HIV positive and not know their HIV-positive status than other racial/ethnic groups. Case-crossover analysis of 208 MSM found that men were more likely to engage in protected anal intercourse with a first time partner and with a partner of unknown HIV status. Although Black MSM were more likely to have Black male partners, they were not more likely to have UAI with those partners or to have a partner aged >40 years. In conclusion, HIV prevalence was high among Black MSM in NYC, as was lack of awareness of HIV-positive status. Having a sexual partner of same race/ethnicity or older age was not associated with having UAI among Black MSM.     

Sexual Risk Behaviors of HIV-Positive,HIV-Negative,and Serostatus-Unknown Black Men Who Have Sex with Men and Women

Black men who have sex with men and women (MSMW) are at high risk for HIV infection and transmission. This study compared the sexual risk behaviors of Black MSMW who self-reported being HIV-positive with those who reported being HIV-negative and those who did not know their HIV status. Respondent-driven sampling (RDS) was used to recruit 1,154 Black MSM in Philadelphia and New York who completed an audio computer-assisted self-interview (ACASI). Of these men, 212 had engaged in anal sex with male partners and vaginal or anal sex with female partners in the past 3 months. A quarter (23.6%; n = 50) of MSMW self-reported testing positive for HIV at their last test, 59.4% (n = 126) reported testing negative for HIV at their last test, and 17.0% (n = 36) reported never having an HIV test. Multivariate logistic regression analysis revealed that HIV-positive MSMW were much less likely than HIV-negative men and never-tested men to have engaged in unprotected intercourse with main male and main female partners perceived to be HIV-negative or of unknown serostatus. However, HIV-positive men were equally as likely as HIV-negative men to have unprotected intercourse with non-main male and non-main female partners perceived as HIV-negative or of unknown serostatus. Our findings indicate that some HIV-positive MSMW engage in unprotected sex that places female and male partners at risk for HIV infection. However, MSMW who have never taken an HIV test, or who have not been recently tested, may be a greater source of HIV transmission to their female and male partners.     

"Sex buddies": a high risk behavior for contracting HIV among homo/bisexual men

OBJECTIVE: Despite prevention efforts, the prevalence of unprotected anal intercourse (UAI) remains substantial among men who have sex with men (MSM). This study describes and analyzes how a group of MSM manages sexual risk with sexual partners. METHOD: Qualitative study by means in-depth, semi-structured interviews with 20 MSM, aged 21 to 40 years old, who had had at least one episode of UAI within the previous 3 months. A grounded theory approach was used to understand sexual risk management with sexual partners as seen by the MSM interviewed. RESULTS: Most MSM were involved in UAI when they established relationships with as a way to balance their need for sexual expression with their need for sexual security. In these relationships, the partner's serostatus was assessed on the basis of trust and the assumption of sharing the same serologic status. CONCLUSIONS: Subjective evaluations (e.g. trust, intuition) played a key role in the decision to engage in UAI with without precise knowledge of their HIV serostatus. Future approaches need to include the role of subjectivity in making decisions related to risk management and the specific contexts (e.g. type of sexual partner) in which UAI takes place.     

Sexual Negotiation, HIV-Status Disclosure, and Sexual Risk Behavior Among Latino Men Who Use the Internet to Seek Sex with Other Men

As part of a wider study of Internet-using Latino men who have sex with men (MSM), we studied the likelihood that HIV-negative (n=200) and HIV-positive (n=50) Latino MSM would engage in sexual negotiations and disclosure of their HIV status prior to their first sexual encounters with men met over the Internet. We also analyzed the sexual behaviors that followed online encounters. Our results showed that both HIV-negative and positive men were significantly more likely to engage in sexual negotiation and serostatus disclosure on the Internet than in person. Those who engaged in sexual negotiations were also more likely to use condoms for anal intercourse. Compared to HIV-negative MSM, HIV-positive MSM were significantly less likely to disclose their serostatus, and 41% of them acknowledged having misrepresented their serostatus to a prospective sexual partner met over the Internet. Although similar proportions of HIV-positive and negative men had condomless anal intercourse, HIV-positive MSM were more likely to report lack of intention to use condoms. Pleasure was the reason most frequently cited for lack of condom use. Cybersex was reported by only one-fifth of the sample. We conclude that the Internet, an understudied milieu of sexual networking, may present new possibilities for the implementation of risk reduction strategies, such as the promotion of sexual negotiation prior to first in-person encounter and serostatus disclosure.     

Trends in the prevalence of HIV infection and risk behaviors in homo- and bisexual men

OBJECTIVES: To describe trends in the prevalence of HIV infection, in risk behaviors and in knowledge and attitudes related to antiretroviral therapy (ART) among men who have sex with men (MSM) recruited in Barcelona (Spain) between 1995 and 2002. METHODS: Cross-sectional surveys were conducted twice yearly from 1993. MSM were recruited in saunas, sex-shops, a cruising site in a public park and by a mailing sent to all members of a gay organization, using an anonymous self-administered questionnaire. From 1995 saliva samples were requested to determine the prevalence of HIV infection. RESULTS: The prevalence of HIV infection remained stable from 14.2% in 1995 to 18.3% in 2002 (p > 0.05). The proportion of men who had more than 10 sexual partners in the previous 12 months showed an increasing trend (from 45.2% in 1995 to 55.7% in 2002, p < 0.0001). Unprotected anal intercourse (UAI) with casual partners did not change significantly between 1995 and 2002 (25.8% en 2002). In 2002, 55.8% of steady couples in which one or both members did not know their serological status and 27.5% of serodiscordant couples reported UAI. The proportion of men who believed that "HIV-positive persons taking ART (7.7% in 2002) or with undetectable viral load (6.4% in 2002) cannot transmit the virus" remained steady since 1998 (p > 0.05). CONCLUSIONS: The prevalence of HIV and risk behaviors continues to be high among MSM in Barcelona. A strategic objective in the control of the HIV epidemic must be to continue the decrease in the number of occasions on which UAI takes place between men with discordant serological status.     

Bridging Sexual Boundaries: Men Who Have Sex with Men and Women in a Street-Based Sample in Los Angeles

The purpose of the study was to determine the potential contribution of bisexual men to the spread of HIV in Los Angeles. We compare the characteristics and behaviors of men who have sex with men and women (MSMW) to men who have sex with only women (MSW) and men who have sex with only men (MSM) in Los Angeles. Men (N?=?1,125) who participated in one of the two waves of data collection from 2005 to 2007 at the Los Angeles site for NIDA’s Sexual Acquisition and Transmission of HIV—Cooperative Agreement Program were recruited using Respondent Driven Sampling. Participants completed Audio Computer Assisted Self Interviews and received oral HIV rapid testing with confirmatory blood test by Western Blot and provided urine specimens for detection of recent powder cocaine, crack cocaine, methamphetamine, or heroin use. MSM, MSW, or MSMW were defined by the gender of whom they reported sex with in the past 6 months. Chi-square tests and ANOVAs were used to test independence between these groups and demographic characteristics, substance use, and sexual behaviors. We fit generalized linear random intercept models to predict sexual risk behaviors at the partner level. Men were mostly of low income, unemployed, and minority, with many being homeless; 66% had been to jail or prison, 29% had ever injected drugs, and 25% had used methamphetamine in the past 30 days. The sample had high HIV prevalence: 12% of MSMW, 65% of MSM, and 4% of MSW. MSMW were behaviorally between MSW and MSM, except that more MSMW practiced sex for trade (both receiving and giving), and more MSMW had partners who are drug users than MSW. Generalized linear random intercept models included a partner-level predictor with four partner groups: MSM, MSMW-male partners, MSMW-female partners, and MSW. The following were significantly associated with unprotected anal intercourse (UAI): MSW (AOR 0.15, 95% CI 0.08, 0.27), MSMW-female partners (AOR 0.4, 95% CI 0.27, 0.61), HIV-positive partners (AOR 2.03, 95% CI 1.31, 3.13), and being homeless (AOR 1.37, 95% CI 1.01, 1.86). The factors associated with giving money or drugs for sex were MSMW-female partners (AOR 1.70, 95% CI 1.09, 2.65), unknown HIV status partners (AOR 1.72, 95% CI 1.29, 2.30), being older (AOR 1.02, 95% CI 1.00, 1.04), history of incarceration (AOR 1.64, 95% CI 1.17, 2.29), and being homeless (AOR 1.73, 95% CI 1.27, 2.36). The following were associated with receiving money or drugs for sex: MSW (AOR 0.53, 95% CI 0.32, 0.89), African American (AOR 2.42, 95% CI 1.56, 3.76), Hispanic (AOR 1.85, 95% CI 1.12, 3.05), history of incarceration (AOR 1.44, 95% CI 1.04, 2.01), history of injecting drugs (AOR 1.57, 95% CI 1.13, 2.19), and had been recently homeless (AOR 2.14, 95% CI 1.57, 2.94). While overall HIV-positive MSM had more UAI with partners of any HIV status than MSMW with either partner gender, among HIV-positive MSMW, more had UAI with HIV-negative and HIV status unknown female partners than male partners. Findings highlight the interconnectedness of sexual and drug networks in this sample of men—as most have partners who use drugs and they use drugs themselves. We find a concentration of risk that occurs particularly among impoverished minorities—where many men use drugs, trade sex, and have sex with either gender. Findings also suggest an embedded core group of drug-using MSMW who may not so much contribute to spreading the HIV epidemic to the general population, but driven by their pressing need for drugs and money, concentrate the epidemic among men and women like themselves who have few resources.     

Sexual Negotiation and HIV Serodisclosure among Men who Have Sex with Men with Their Online and Offline Partners

The aim of this study was to examine online profile and in-person communication patterns and their associations with unprotected anal intercourse (UAI) in online and offline partnerships between men who have sex with men (MSM) who have never tested for HIV ("Never Tested"), had been tested at least once for HIV ("Tested"), and had tested positive for HIV. Between September and November 2005, 2,716 MSM participated in a one-time online survey. Although 75% and 72% of the Tested and Never Tested groups disclosed a HIV-negative status in all of their online profiles, 17% of HIV-positive participants did so. Exchanging HIV status information was highest among the Tested group, while HIV-positive men were most likely to negotiate UAI. Serodisclosure was not an independent predictor of UAI, although making an explicit agreement to engage in UAI was. Sexual communication and risk-taking patterns differed by testing status. Explicit agreements to avoid UAI were associated with reduced sexual risk-taking. Misrepresentation of HIV status is an identified challenge for HIV prevention.     

Bridging Sexual Boundaries: Men Who Have Sex with Men and Women in a Street-Based Sample in Los Angeles

The purpose of the study was to determine the potential contribution of bisexual men to the spread of HIV in Los Angeles. We compare the characteristics and behaviors of men who have sex with men and women (MSMW) to men who have sex with only women (MSW) and men who have sex with only men (MSM) in Los Angeles. Men (N = 1,125) who participated in one of the two waves of data collection from 2005 to 2007 at the Los Angeles site for NIDA’s Sexual Acquisition and Transmission of HIV—Cooperative Agreement Program were recruited using Respondent Driven Sampling. Participants completed Audio Computer Assisted Self Interviews and received oral HIV rapid testing with confirmatory blood test by Western Blot and provided urine specimens for detection of recent powder cocaine, crack cocaine, methamphetamine, or heroin use. MSM, MSW, or MSMW were defined by the gender of whom they reported sex with in the past 6 months. Chi-square tests and ANOVAs were used to test independence between these groups and demographic characteristics, substance use, and sexual behaviors. We fit generalized linear random intercept models to predict sexual risk behaviors at the partner level. Men were mostly of low income, unemployed, and minority, with many being homeless; 66% had been to jail or prison, 29% had ever injected drugs, and 25% had used methamphetamine in the past 30 days. The sample had high HIV prevalence: 12% of MSMW, 65% of MSM, and 4% of MSW. MSMW were behaviorally between MSW and MSM, except that more MSMW practiced sex for trade (both receiving and giving), and more MSMW had partners who are drug users than MSW. Generalized linear random intercept models included a partner-level predictor with four partner groups: MSM, MSMW-male partners, MSMW-female partners, and MSW. The following were significantly associated with unprotected anal intercourse (UAI): MSW (AOR 0.15, 95% CI 0.08, 0.27), MSMW-female partners (AOR 0.4, 95% CI 0.27, 0.61), HIV-positive partners (AOR 2.03, 95% CI 1.31, 3.13), and being homeless (AOR 1.37, 95% CI 1.01, 1.86). The factors associated with giving money or drugs for sex were MSMW-female partners (AOR 1.70, 95% CI 1.09, 2.65), unknown HIV status partners (AOR 1.72, 95% CI 1.29, 2.30), being older (AOR 1.02, 95% CI 1.00, 1.04), history of incarceration (AOR 1.64, 95% CI 1.17, 2.29), and being homeless (AOR 1.73, 95% CI 1.27, 2.36). The following were associated with receiving money or drugs for sex: MSW (AOR 0.53, 95% CI 0.32, 0.89), African American (AOR 2.42, 95% CI 1.56, 3.76), Hispanic (AOR 1.85, 95% CI 1.12, 3.05), history of incarceration (AOR 1.44, 95% CI 1.04, 2.01), history of injecting drugs (AOR 1.57, 95% CI 1.13, 2.19), and had been recently homeless (AOR 2.14, 95% CI 1.57, 2.94). While overall HIV-positive MSM had more UAI with partners of any HIV status than MSMW with either partner gender, among HIV-positive MSMW, more had UAI with HIV-negative and HIV status unknown female partners than male partners. Findings highlight the interconnectedness of sexual and drug networks in this sample of men—as most have partners who use drugs and they use drugs themselves. We find a concentration of risk that occurs particularly among impoverished minorities—where many men use drugs, trade sex, and have sex with either gender. Findings also suggest an embedded core group of drug-using MSMW who may not so much contribute to spreading the HIV epidemic to the general population, but driven by their pressing need for drugs and money, concentrate the epidemic among men and women like themselves who have few resources.     

High human immunodeficiency virus type 1 seroprevalence in men who have sex with men in Buenos Aires, Argentina: risk factors for infection

OBJECTIVE: To determine human immunodeficiency virus (HIV) seroprevalence in a sample of men who have sex with men (MSM) in Buenos Aires City and to identify risk factors associated with HIV type 1 infection. METHODS: Participants were invited to receive HIV counselling and testing at "NEXO" (a gay non-governmental organization) by means of informative leaflets distributed in gay nightclubs, porno cinemas, gymnasiums, and in the streets. During the encounter, the study was explained by a trained social worker and individuals were invited to volunteer for the study. Diagnosis of HIV was performed using two screening tests and Western Blot assay was used as confirmatory. RESULTS: Human immunodeficiency virus was detected in 96 (13.8%; 95% CI: 11.4-16.7) of 694 MSM. Fourteen (14.6%) of the 96 HIV-positive MSM were already aware of their HIV serostatus. In univariate analysis, HIV-1 infection (odds ratio [OR] >1.5) was found to be associated with older age (30-39 years), being unemployed, a previous sexually transmitted disease (STD) history, and having an HIV-positive partner. Cocaine consumption and irregular use of condoms with occasional partners were also found to be risk factors. In multivariate logistic regression analysis, being unemployed (OR = 3.42; 95% CI: 1.17-9.99) and having an HIV-positive partner (OR = 2.67; 95% CI: 1.09-6.52) remained significant risk factors. DISCUSSION: The high HIV-1 prevalence observed suggests an urgent need for implementation of effective prevention campaigns. This represents the first cross-sectional epidemiological study of HIV among the high-risk group of MSM in Argentina.     

Sexual behaviour reported by a sample of Italian MSM before and after HIV diagnosis

In 2006 we conducted a cross-sectional study involving hospital clinical centres in five Italian cities to compare the sexual behaviour of HIV-positive MSM (men who have sex with men) before and after the diagnosis of HIV infection. Each centre was asked to enrol 30 HIV-positive persons aged ≥ 18 years. The questionnaire was administered to 143 MSM on average 9 years after HIV diagnosis. After diagnosis there was a decrease in the number of sexual partners: the percentage of persons who reported having had more than 2 partners decreased from 95.8% before diagnosis to 76.2% after diagnosis. After diagnosis, there was a significant decrease in the percentage of persons who had never (or not always) used a condom with their stable partner for anal sex from 69.2% before diagnosis to 26.6% after diagnosis and for oral-genital sex from 74.8% before diagnosis to 51.7% after diagnosis. Though at-risk behaviour seems to decrease after diagnosis, seropositive MSM continue to engage in at-risk practices: one fourth of them did not use a condom during sexually transmitted infections (STI) episodes, 12.5% of the participants had had sex for money, and 8.4% had paid for sex. The study shows that our sample of Italian HIV-positive MSM, though aware of being infected, engage in sexual behaviours that could sustain transmission of HIV and other STIs. The results could constitute the first step in implementing national prevention programs for persons living with HIV.     

Psychosocial Predictors of Sexual HIV Transmission Risk Behavior among HIV-Positive Adults with a Sexual Abuse History in Childhood

Childhood sexual abuse (CSA) is associated with HIV sexual risk behavior. Although many psychosocial correlates of sexual risk among HIV-positive persons have been identified, studies predicting continued risk among HIV-positive adults with histories of CSA are limited. This cross-sectional study identified variables predictive of sexual transmission risk behavior among an ethnically diverse sample of 256 HIV-positive adults (women and men who have sex with men; MSM) with CSA histories. Participants were assessed for trauma symptoms, shame related to HIV and sexual trauma, substance use, coping style, and sexual risk behavior. Logistic regression analyses were conducted to identify variables predictive of unprotected sexual behavior in the past 4 months. Unprotected sex was significantly associated with substance use and trauma-related behavioral difficulties among women and men, and less spiritual coping among men. Unprotected sex with HIV negative or serostatus unknown partners was significantly associated with greater trauma-related behavioral difficulties, more HIV-related shame, and fewer active coping strategies. Thus, trauma symptoms, shame, coping style, and substance use were significantly associated with sexual risk behavior among HIV-positive adults with histories of CSA, with models of prediction differing by gender and partner serostatus. HIV prevention intervention for persons with HIV and CSA histories should address trauma-related behavioral difficulties and enhance coping skills to reduce sexual transmission risk behavior.     

Ambivalent tales of HIV disclosure in San Francisco

In light of rising levels of unprotected anal intercourse (UAI) among men who have sex with men (MSM) in San Francisco, we sought to understand disclosure practices, the calculus of risk and attitudes about HIV seroconversion. In 2000, 150 MSM participated in interviews pivoting around a detailed narrative of a recent incident of UAI. In order to understand the relationship between individual and community norms, we analyzed the narratives as accounts situated within the respondents' experience of the HIV epidemic and the gay community in San Francisco. In justifying their risky sexual practices, MSM cited a community-wide shift toward non-disclosure and barebacking since the advent of highly active anti-retroviral therapy (HAART). Fearing rejection by HIV-positive partners who refuse to use condoms, HIV-negative men saw little advantage in disclosing to casual partners whom they perceived as overwhelmingly HIV-positive. By contrast, HIV-positive men appeared eager to disclose their positive status to release themselves from responsibility for transmission and facilitate "bareback" or unprotected sex. Disavowal of individual responsibility for safer sex in deference to community norms may contribute to the recent spiraling of risk behavior and HIV incidence. Implications for prevention policy are discussed.     

HIV Prevalence and Demographic Determinants of Unprotected Anal Sex and HIV Testing Among Men Who Have Sex with Men in Beirut,Lebanon

The limited epidemiological data in Lebanon suggest that HIV incident cases are predominantly among men who have sex with men (MSM). We assessed the prevalence of HIV and demographic correlates of condom use and HIV testing among MSM in Beirut. Respondent-driven sampling was used to recruit 213 participants for completion of a behavioral survey and an optional free rapid HIV test. Multivariate regression analysis was used to examine demographic correlates of unprotected anal sex and any history of HIV testing. Nearly half (47 %) were under age 25 years and 67 % self-identified as gay. Nearly two-thirds (64 %) reported any unprotected anal intercourse (UAI) with men in the prior 3 months, including 23 % who had unprotected anal intercourse with men whose HIV status was positive or unknown (UAIPU) to the participant. Three men (1.5 % of 198 participants tested) were HIV-positive; 62 % had any history of HIV testing prior to the study and testing was less common among those engaging in UAIPU compared to others (33 % vs. 71 %). In regression analysis, men in a relationship had higher odds of having UAI but lower odds of UAIPU and any university education was associated with having UAI; those with any prior history of HIV testing were more likely to be in a relationship and have any university education. HIV prevention efforts for MSM need to account for the influence of relationship dynamics and promotion of testing needs to target high-risk MSM.     

Exploring the Venue’s Role in Risky Sexual Behavior Among Gay and Bisexual Men: An Event-Level Analysis from a National Online Survey in the U.S.

Venue-based characteristics (e.g., alcohol in bars, anonymous chat online, dark/quiet spaces in bathhouses) can impact how men who have sex with men (MSM) negotiate sex and HIV-associated risk behavior. We sought to determine the association between HIV-associated risk factors and the venues where MSM met their most recent new (first-time) male sex partner, using data from a 2004 to 2005 national online anonymous survey of MSM in the U.S. (n = 2,865). Most men (62%) met their partner through the Internet. Among those reporting anal sex during their last encounter (n = 1,550), half had not used a condom. In multivariate modeling, and among men reporting anal sex during their last encounter, venue where partner was met was not significantly associated with unprotected anal intercourse (UAI). Nevertheless, venue was related to other factors that contextualized men’s sexual encounters. For example, HIV status disclosure was lowest among men who met their most recent partner in a park, outdoors, or other public place and highest among men who met their most recent partner online. Alcohol use prior to/during the last sexual encounter was highest among men who met their most recent partner in a bathhouse or a bar/club/party/event. These data suggest it is possible to reach men online who seek sex in many different venues, thus potentially broadening the impact of prevention messages delivered in virtual environments. Although not associated with UAI, venues are connected to social-behavioral facets of corresponding sexual encounters, and may be important arenas for differential HIV and STI education, treatment, and prevention.     

Unprotected Sexual Behavior Among Heterosexual HIV-Positive Injection Drug Using Men: Associations by Partner Type and Partner Serostatus

Few studies have examined sexual risk behaviors of HIV-positive, heterosexual, injection drug using (IDU) men. We investigated such behaviors and associations with risk among sexually active, HIV-positive IDU men who reported only female sex partners in the 3 months prior to baseline interview. We examined associations separately for four non-exclusive groups of men by crossing partner type (main or casual) and partner serostatus (HIV-positive or HIV-negative/unknown). Of 732 male participants, 469 (64%) were sexually active with only female partners. Of these 469 men, 155 (33%) reported sex with HIV-positive main partners, 127 (27%) with HIV-negative or unknown serostatus main partners, 145 (31%) with HIV-positive casual partners, and 192 (41%) with HIV-negative/unknown serostatus casual partners. Significant multivariate associations for unprotected sex with HIV-negative or unknown serostatus main partners were less self-efficacy to use condoms, weaker partner norms supporting condoms, and more negative condom beliefs. Similar correlates were found for unprotected sex with HIV-positive main and casual partners. In addition, alcohol or drug use during sex was a significant correlate of unprotected sex with HIV-positive main partners, while depression was significant for HIV-positive casual partners. For unprotected sex with HIV-negative/unknown status casual partners, self-efficacy for condom use, sex trade, and education were significant multivariate correlates. A combination of broad and tailored intervention strategies based on the relationship pattern of men's lives may provide the most benefit for reducing unprotected sex with female partners.Purcell and Mizuno are with the Division of HIV/AIDS Prevention, National Center for HIV, STD, and TB Prevention, Centers for Disease Control and Prevention, Atlanta, GA, USA; Metsch is with the University of Miami, Miami, FL, USA; Garfein is with the Department of Family and Preventive Medicine, University of California at San Diego, San Diego, CA, USA; Tobin is with the Bloomberg School of Public Health, Baltimore, MD, USA; Knight is with the University of California at San Francisco, San Francisco, CA, USA; Latka is with the Center for Urban Epidemiologic Studies, New York Academy of Medicine, New York, NY, USA.The findings and conclusions in this report are those of the authors and do not necessarily represent the views of the Centers for Disease Control and Prevention.     

High-risk behaviors among men who have sex with men in 6 US cities: baseline data from the EXPLORE Study

OBJECTIVES: We describe the prevalence of risk behaviors at baseline among men who have sex with men (MSM) who were enrolled in a randomized behavioral intervention trial conducted in 6 US cities. METHODS: Data analyses involved MSM who were negative for HIV antibodies and who reported having engaged in anal sex with 1 or more partners in the previous year. RESULTS: Among 4295 men, 48.0% and 54.9%, respectively, reported unprotected receptive and insertive anal sex in the previous 6 months. Unprotected sex was significantly more likely with 1 primary partner or multiple partners than with 1 nonprimary partner. Drug and alcohol use were significantly associated with unprotected anal sex. CONCLUSIONS: Our findings support the continued need for effective intervention strategies for MSM that address relationship status, serostatus of partners, and drug and alcohol use.     

男男性行为人群HIV/AIDS性伴感染状况和溯源效率相关因素研究

目的 了解MSM HIV/AIDS的性伴感染状况和溯源效率的相关因素。方法 采用横断面调查方法,2018-2020年在宁波市对MSM HIV/AIDS开展性伴调查和HIV检测,并用限制性抗原亲和力酶联免疫法判定是否新发感染。分类资料采用χ²检验,采用多因素logistic回归分析溯源效率的相关因素。结果 共调查374例新确证MSM HIV/AIDS,动员479例性伴进行调查和HIV检测,性伴HIV阳性率为15.7%（75/479,95%CI：12.4%~18.9%）,其中新发感染者性伴HIV阳性率为31.8%（21/66,95%CI：20.3%~43.4%）。新发感染者的性伴HIV阳性者中新发现阳性性伴的比例（76.2%）高于长期感染者（48.1%）,差异有统计学意义（P=0.028）。多因素logistic回归分析结果显示,36~45岁年龄组（与18~25岁年龄组相比,OR=3.973,95%CI：1.364~11.569）、HIV主动检测（与HIV被动检测相比,OR=1.896,95%CI：1.083~3.319）、新发感染者（与长期感染者相比,OR=3.733,95%CI：1.844~7.556）的溯源效率更高。结论 MSM HIV/AIDS性伴HIV阳性率高,其中新发感染者和HIV主动检测发现的感染者性伴溯源效率较高。建议加强MSM HIV/AIDS溯源调查,重点关注艾滋病自愿咨询与检测门诊新确证的MSM HIV/AIDS。     

Do traditional risk factors predict whether men who have sex with men engage in unprotected anal intercourse? The need for locally based research to guide interventions

A great deal of research effort has been expended in an effort to identify the variables which most influence men who have sex with men's (MSM) unsafe sexual behaviors.While a set of predictor variables has emerged, these predict the unsafe behaviors of MSM in some locations but not in others, suggesting the need to investigate the predictive ability of these variables among MSM in previously understudied populations. Therefore, this study examined the ability of previously identified factors to predict unsafe sexual behaviors among MSM in Houston, Texas. Data were collected through a short self-report survey completed by MSM attending the Houston pride festival. The multiethnic participants (N = 109) represented a range of age, educational, and income backgrounds. Fifty-seven percent of the survey respondents had been drunk and/or high in sexual contexts, 19 percent evidenced alcohol dependency, 26 percent reported finding sex partners online and sex with serodiscordant or unknown serostatus partners was common. Compared to men who did not report unprotected anal intercourse (UAI) in the preceding two months, MSM who engaged in UAI were younger and more likely to use alcohol in sexual contexts, meet men online for offline sex, and perceive lower safer sex norms in their community. Although these results were statistically significant, the strength of the relationships was too small to have any practical value. The lack of useful explanatory power underscores the importance of accelerated HIV research that identifies the unique, local factors associated with unsafe sex in other previously understudied populations.