[HCV and Treponema pallidum infection status in HIV/AIDS cases in Yunnan province, January-June, 2020].

Objective: To understand the infection status of HCV and Treponema pallidum (TP) in HIV/AIDS cases in Yunnan province,and identify the risk factors. Methods: Between January 1 and June 30 in 2020,a cross-sectional survey was conducted in Yunnan. Two enzyme-linked immunosorbent assay (ELISA) kits were used to detect anti-HCV, the positive results of both two kits indicated HCV infection. ELISA and syphilis toluidine red untreated serum test were applied to identify TP infection. Both Excel 2016 and SPSS 22.0 software were used for statistical analysis, and logistic regression model was conducted to identify the relevant factors of HCV and TP infection. Results: A total of 5 922 HIV/AIDS cases were included in this study, the infection rates of HCV and TP were 6.5% (383/5 922) and 5.8% (344/5 922) respectively. The co-infection rate of HCV and TP was 0.4% (22/5 922). The risk for HCV infection in HIV/AIDS cases was higher in younger age groups compared with age group ≥50 years (15-19:a OR =3.53;20-29:a OR =3.02;30-39:a OR =2.91;40-49:a OR =3.61), in males than in females (a OR =2.31), in the married and unmarried than in the divorced or widowed (married:a OR =1.61;unmarried:a OR =1.63), in other ethnic groups than in Han ethnic group (a OR =1.70), in people with lower education level than in people with education level of college and above (primary school degree and below:a OR =4.69;middle school:a OR =3.96), in people living in the central and western Yunnan than in people living in eastern Yunnan (central Yunnan:a OR =2.46; western Yunnan:a OR =7.08), in injection drug users than in MSM (a OR =131.08). The risk of TP infection in HIV/AIDS cases was higher in people with education level of college and primary school than in middle school degree (primary school and below:a OR =1.73;college and above:a OR =1.77), in people with other occupations than in farmers (a OR =1.39), in people living in eastern Yunnan than in people living in western Yunnan (a OR =1.75); in MSM than in people with heterosex (a OR =9.75). Conclusions: A certain proportion of HIV/AIDS cases reported between January and June in 2020 in Yunnan were co-infected with HCV and TP, many factors were associated with the co-infection. It is suggested to strengthen HCV and TP tests in HIV/AIDS cases and conduct active treatment of the co-infection.