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Objectives: To detect and quantify current risk factors for HIV seroconversion among gay men seeking repeat tests at sexual health clinics. Design: Unmatched case control study conducted in London, Brighton and Manchester, UK. Methods: 75 cases (recent HIV positive test following negative test within the past 2 years) and 157 controls (recent HIV negative test following a previous negative test within the past 2 years) completed a computer-assisted self interview focused on sexual behaviour and lifestyle between HIV tests. Results: Cases and controls were similar in socio-demographics, years since commencing sex with men, lifetime number of HIV tests, reasons for seeking their previous HIV tests and the interval between last HIV tests (mean = 10.5 months). Risk factors between tests included unprotected receptive anal intercourse (URAI) with partners not believed to be HIV negative (adjusted odds ratio (AOR) and 95% confidence interval 4.1, 1.8 to 9.3), where increased risk was associated with concomitant use of nitrite inhalants, receiving ejaculate and increasing numbers of partners. Independent risk was also detected for unprotected insertive anal intercourse (UIAI) with more than one man (AOR 2.7, 1.3 to 5.5) and use of nitrite inhalants (AOR 2.4, 1.1 to 5.2). Conclusions: HIV serodiscordant unprotected anal intercourse remains the primary context for HIV transmission among gay men, with increased risk associated with being the receptive partner, receiving ejaculate and use of nitrite inhalants. Although the HIV transmission risk of URAI is widely acknowledged, this study highlights the risk of UIAI and that nitrite inhalants may be an important facilitator of transmission when HIV exposure occurs. [ABSTRACT FROM AUTHOR]

Objectives: To explore the feasibility and acceptability of offering rapid HIV testing to men who have sex with men in gay social venues., Methods: Qualitative study with in-depth interviews and focus group discussions. Interview transcripts were analysed for recurrent themes. 24 respondents participated in the study. Six gay venue owners, four gay service users and one service provider took part in in-depth interviews. Focus groups were conducted with eight members of a rapid HIV testing clinic staff and five positive gay men., Results: Respondents had strong concerns about confidentiality and privacy, and many felt that HIV testing was "too serious" an event to be undertaken in social venues. Many also voiced concerns about issues relating to post-test support and behaviour, and clinical standards. Venue owners also discussed the potential negative impact of HIV testing on social venues., Conclusion: There are currently substantial barriers to offering rapid HIV tests to men who have sex with men in social venues. Further work to enhance acceptability must consider ways of increasing the confidentiality and professionalism of testing services, designing appropriate pre-discussion and post-discussion protocols, evaluating different models of service delivery, and considering their cost-effectiveness in relation to existing services.