title: [A comprehensive surveillance on HIV among 1,237 men who have sex with men in thirteen cities of Yunnan].
abstract: OBJECTIVE
  To understand the knowledge, risk behaviors and HIV prevalence in men who have sex with men (MSM) in thirteen cities.
  
  
  METHODS
  Target samples were chosen using the snowball-rolling method, with transverse KABP and HIV-antibody testing developed for those MSM in thirteen cities of Yunnan.
  
  
  RESULTS
  A total of 1237 valid questionnaires and 1129 blood samples were collected. Basic knowledge on HIV and the rate of the response was 93.2%. 81.1% of the respondents had anal sex with male partners in the last six months, of them 49.7% could persistently using condoms in each anal sex episode. 29.0% of the respondents had sex with female partners in the last six months. The HIV prevalence among the studied MSM was 8.2% and the prevalence of syphilis among them was 3.9%. Most risky factors of those MSM infected by HIV would include: not persistently use condom when having sex and co-infection of syphilis.
  
  
  CONCLUSIONS
  Both rates of HIV infection associated risk behaviors and HIV prevalence were high in MSM under study that called for more work on HIV prevention and control MSM in Yunnan.
authors.affiliation: Yunnan Provincial Center for Disease Control and Prevention, Kunming 650022, China.
authors.forename: Hong-Bing
authors.initials: HB
authors.lastname: Luo
authors.forename: Jing-Yuan
authors.initials: JY
authors.lastname: Mei
authors.forename: Li-Jun
authors.initials: LJ
authors.lastname: Song
authors.forename: Ran
authors.initials: R
authors.lastname: Lu
authors.forename: Ji-Yun
authors.initials: JY
authors.lastname: Lu
authors.forename: Li-Ru
authors.initials: LR
authors.lastname: Fu
authors.forename: Xue-Hua
authors.initials: XH
authors.lastname: Li
authors.forename: Man-Hong
authors.initials: MH
authors.lastname: Jia
authors.forename: Lin
authors.initials: L
authors.lastname: Lu
mesh_terms: D002681:China / Q000453:epidemiology; D002947:Cities; D060085:Coinfection; D017280:Condoms / Q000706:statistics & numerical data; D005260:Female; D015658:HIV Infections / Q000453:epidemiology*; D007722:Health Knowledge, Attitudes, Practice; D018451:Homosexuality, Male / Q000523:psychology* / Q000706:statistics & numerical data*; D006801:Humans; D008297:Male; D011159:Population Surveillance; D015995:Prevalence; D012307:Risk Factors; D012309:Risk-Taking; D012725:Sexual Behavior / Q000523:psychology / Q000706:statistics & numerical data; D012747:Sexual Partners; D011795:Surveys and Questionnaires; D013587:Syphilis / Q000453:epidemiology