[A comprehensive surveillance on HIV among 1,237 men who have sex with men in thirteen cities of Yunnan].

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.

[A dynamic analysis on incidence and trend of HIV-1 epidemics among intravenous drug users, attendants at the STD clinics and pregnant women in Yunnan province, China].

Objective: BED-CEIA assay was used in HIV/AIDS surveillance sentinel sites to identify recent HIV-1 infection, to estimate HIV-1 incidence and to understand the epidemic trends in Yunnan province.

Methods: Serum specimens were collected from IDUs in sentinel sites, attendants in STD clinics and pregnant women under a cross sectional study from 2000 to 2007. Specimens confirmed as HIV-1 positive were tested with BED-CEIA to find recent HIV-1 infection, then the annual HIV-1 incidence for each group was calculated and the trends of HIV-1 incidence observed.