400例MSM行为特征及HIV、HAV、HCV、HEV、梅毒感染状况的横断面调查

目的 了解云南省玉溪市MSM人群的行为特征及HIV、HAV、HCV、HEV、梅毒感染状况，为开展有针对性的健康教育和行为干预提供依据。方法 2018年4 - 7月在玉溪市采用横断面调查，滚雪球抽样方法，共纳入400例MSM，开展行为学问卷调查，采集血液样本进行HIV、HAV、HCV、HEV和梅毒抗体检测。 结果 400例MSM中98.25%对艾滋病基本知识知晓。318例最近6个月与男性发生过肛交性行为，88.68%都坚持每次使用安全套，最近1次肛交时96.86%使用了安全套。84例最近6个月与异性发生性行为，94.05%都坚持每次使用安全套，最近1次与异性发生性行为时98.81%使用了安全套。HIV、HAV、HCV、HEV、梅毒感染率分别为3.00%（95%CI:1.33～4.67）、1.25%（95%CI:0.16～2.34）、0.25%（95%CI:0.00～0.74）、1.00%（95%CI:0.03～1.98）、4.75%（95%CI:2.67～6.83）。结论 MSM人群不仅是HIV、HCV、梅毒的高危人群，HAV、HEV也高发，需针对该人群推广接种HAV、HEV疫苗。

Cross-sectional survey of behavioral characteristics and infection status of HIV,HAV, HCV,HEV, syphilis among 400 men who had sex with men

Objective The aim of this study was to understand the behavioral characteristics and the infection status of HIV, HAV, HCV, HEV, syphilis among men who had sex with men(MSM) in Yuxi prefecture of Yunnan province, and to provide the strategies of sexual health education and behavioral intervention. Methods A total of 400 MSM cases were included using cross-sectional survey and snowball-rolling method from April to July 2018. The behavioral questionnaire survey was conducted, and blood samples were collected for HIV, HAV, HCV, HEV, syphilis antibody testing. Results The knowledge rate of AIDS was 98.25% among 400 MSM. 318 cases had anal sex with men in the last six months, with 88.68% using condoms consistently, and 96.86% of them used condoms in the last anal sex episode. 84 cases had sex with female in the last six months, with 94.05% using condoms consistently, and 98.81% of them used condoms in the last sex with female. The HIV, HAV, HCV, HEV and syphilis infection rates were 3.00% (95% confidence interval 95%CI]: 1.33-4.67), 1.25% (95% CI: 0.16-2.34), 0.25% (95% CI: 0.00-0.74), 1.00% (95% CI: 0.03-1.98) and 4.75% (95% CI: 2.67-6.83), respectively. Conclusion The MSM was demonstrated to be high-risk population of HIV, HCV, syphilis, and of HAV and HEV in Yuxi prefecture, supporting the importance for HAV and HEV vaccines in MSM.