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目的了解深圳市男男性行为人群(MSM)的异性性行为特征,分析其对该人群艾滋病病毒(HIV)/梅毒感染的影响。方法在知情同意原则下,收集2009-2012年深圳市MSM的社会人口学、高危行为等信息,并采集血液进行HIV/梅毒检测。结果共3445名MSM接受自愿咨询检测,969人(28.13%)最近半年内发生过异性性行为,其中28.07%的人(272/969)女性性伴数≥2个,32.71%的人(317/969)与女性性伴性交时每次使用安全套。梅毒感染率为17.54%(170/969),HIV感染率为7.53%(73/969),HIV合并梅毒感染率为4.13%(40/969)。与近半年无异性性行为的MSM相比,发生异性性行为的MSM半年内肛交性伴数和口交性伴数较少,肛交时每次使用安全套的比例较高,梅毒感染率相对较低。结论相当比例的MSM最近半年内有异性性行为,应有针对性地采取干预措施,阻断HIV经异性性传播。
Objective To understand the heterosexual behavior characteristics of MSM in Shenzhen and to analyze its influence on HIV / syphilis infection in this population. Methods Under the principle of informed consent, we collected information on the socio-demographic and risk behaviors of MSM in Shenzhen from 2009 to 2012 and collected blood for HIV / syphilis testing. Results A total of 3445 MSM patients received voluntary counseling and testing, 969 (28.13%) had heterosexual behaviors in the last six months, 28.07% (272/969) had more than 2 female sexual partners and 32.71% (317 / 969) Condom use every time sexual intercourse with a female partner. Syphilis infection rate was 17.54% (170/969), HIV infection rate was 7.53% (73/969), HIV infection rate was 4.13% (40/969). Compared with the MSM with no heterosexual behavior for nearly six months, MSM with heterosexual behavior had fewer anal sex partners and fewer oral sex partners within six months, higher rates of condom use during anal sex, and lower rates of syphilis infection. Conclusion A significant proportion of MSM had heterosexual behavior within the past six months and should take targeted interventions to stop the transmission of HIV through heterosexual transmission.