Department of Infectious Disease Epidemiology, St Mary's Campus, Imperial College, London, UK.
Sex Transm Infect. 2010 Jun;86(3):187-92. doi: 10.1136/sti.2009.038216.
The aim of this study was to quantify differences in patterns of sexual behaviour among men who have sex with men and women (MSMW) compared with men who have sex with men only (MSMO), and to examine the extent to which bisexual behaviour may act as a bridge for introducing HIV infection into the general population.
A cross-sectional survey in Bangalore city in 2006, which sampled men seeking sex with men in public places and hammams (bath houses where transgender individuals sell sex to men).
Among a sample of 357 men reporting same-sex behaviour; 41% also reported sex with a woman in the past year and 14% were currently married to a woman, only two of whom had informed their wives about having sex with men. Condom use was very inconsistent with all male partners, while 98% reported unprotected vaginal sex with their wives. MSMW reported lower rates of risky behaviour with other men than MSMO: fewer reported selling sex (17% vs 58%), or receptive anal sex with known (28% vs 70%) or unknown (30% vs 59%) non-commercial partners.
Bisexual behaviour was common among men seeking sex with men sampled in this survey. Although MSMW reported lower rates of risky sexual behaviour with male partners than MSMO, inconsistent condom use with both male and female partners indicates a potential means of HIV transmission into the general population. HIV prevention programmes and services should reach bisexual men who potentially expose their male and female partners to HIV.
本研究旨在定量分析男男性接触者（MSM）与仅男男性接触者（MSMO）在性行为模式方面的差异，并探讨双性性行为在多大程度上可能成为将 HIV 感染引入普通人群的桥梁。
2006 年在班加罗尔市进行的横断面调查，对在公共场所和浴室（男同性恋者向男性出售性服务的浴室）寻求与男性发生性关系的男性进行抽样。
在报告同性性行为的 357 名男性样本中；41%的人在过去一年中还报告与女性发生过性行为，14%的人目前与女性结婚，其中只有两人告知妻子与男性发生过性行为。与所有男性伴侣发生性行为时，避孕套的使用非常不一致，而 98%的人报告与妻子发生过无保护的阴道性行为。MSMW 报告的与其他男性发生危险行为的比率低于 MSMO：报告卖淫（17%比 58%）或与已知（28%比 70%）或未知（30%比 59%）非商业伴侣进行被动肛交的人数较少。
在这项调查中，对寻求与男性发生性关系的男性进行抽样，双性性行为很常见。尽管 MSMW 报告与男性伴侣发生危险性行为的比率低于 MSMO，但与男性和女性伴侣发生性行为时使用避孕套不一致，这表明可能存在将 HIV 传播给普通人群的途径。艾滋病毒预防方案和服务应覆盖可能使男性和女性伴侣面临 HIV 感染风险的双性恋男性。
