title: Changes in Prevalence of HIV or Syphilis among Male Sex Workers and Non-Commercial Men Who Have Sex with Men in Shenzhen, China: Results of a Second Survey.
abstract: BACKGROUND
  A previous time-location sampling survey (TLS) was performed in 2008 to evaluate the HIV or syphilis infection rate among male sex workers (MSWs) and non-commercial men who have sex with men (ncMSM) in Shenzhen, China. This is a second TLS performed in 2014. This article describes the findings and changes in the prevalence of HIV and syphilis.
  
  
  METHODS
  TLS was used to collect information as a second cross-sectional survey to an earlier TLS assessment. Data on behavior (e.g., sexual history and sexual behavior) were analyzed. Blood specimens were drawn for HIV and syphilis testing. To determine the changes in the prevalence of HIV and syphilis, we analyzed these results and compared them to the results of our first survey.
  
  
  RESULTS
  A total of 965 participants were recruited, including 489 MSWs and 476 ncMSM. Overall, the prevalence of HIV was 9.7%: 2.9% for MSWs and 16.8% for ncMSM (P<0.001). 10.9% of the 965 participants tested positive for syphilis: 4.5% among MSWs and 17.4% among ncMSM (P<0.001). The HIV prevalence in MSWs decreased from 4.5% in 2008 to 2.9% in 2014 (P = 0.143) but increased in ncMSM (7.0% in 2008 vs 16.8% in 2014, P<0.001). Decreased syphilis rates were observed in both MSWs (12.9% in 2008 vs 4.5% in 2014, P<0.001) and ncMSM (20.2% in 2008 vs 17.4% in 2014, P = 0.221).
  
  
  CONCLUSIONS
  Overall, there was a decline in the prevalence of HIV and syphilis in MSWs but not in ncMSM. The study indicated the need for continued efforts to improve public health, particularly to counter the rising rate of HIV in ncMSM.
authors.affiliation: Department of Preventive Medicine, Shantou University Medical College, Shantou, Guangdong, China.
authors.forename: Yuanwei
authors.initials: Y
authors.lastname: Huang
authors.affiliation: Department of Preventive Medicine, Shantou University Medical College, Shantou, Guangdong, China.
authors.forename: Yanting
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Department of Preventive Medicine, Shantou University Medical College, Shantou, Guangdong, China.
authors.forename: Ke
authors.initials: K
authors.lastname: Li
authors.affiliation: Shenzhen Center for Disease Control and Prevention, Guangdong, China.
authors.forename: Jin
authors.initials: J
authors.lastname: Zhao
mesh_terms: D000328:Adult; D002681:China / Q000453:epidemiology; D003430:Cross-Sectional Studies; D006678:HIV / Q000302:isolation & purification; D015658:HIV Infections / Q000175:diagnosis / Q000453:epidemiology*; D018451:Homosexuality, Male; D006801:Humans; D008297:Male; D015995:Prevalence; D011634:Public Health; D012307:Risk Factors; D011477:Sex Work; D060386:Sex Workers; D012747:Sexual Partners; D011795:Surveys and Questionnaires; D013587:Syphilis / Q000175:diagnosis / Q000453:epidemiology*; D014210:Treponema pallidum / Q000302:isolation & purification; D055815:Young Adult