Female genital schistosomiasis and reproductive tract infections. A cross-sectional study in rural adolescents in South Africa

ABSTRACT Background and objectives The aim of the current study was to establish the relative prevalences of Female Genital Schistosomiasis (FGS) and sexually transmitted infections (STIs). We hypothesised that due to the use of syndromic management for STIs it is possible that FGS is being misdiagnosed and mismanaged as an STI. We therefore wanted to examine the relationship between FGS and the individual STIs in schistosomiasis endemic areas. Methods Between 2011 and 2013, a cross-sectional study was performed in 32 randomly selected secondary schools in rural KwaZulu-Natal, South Africa, where each school had at least 300 pupils. In a research clinic, FGS diagnosis, STI testing, and face-to-face interviews were performed in sexually active, young women aged 16 – 22 years. Results FGS was the second most prevalent current genital infection (23%). There were significantly more women who had presented FGS among those who had detectable urinary schistosomiasis (35%), compared to those without (19%, p< 0.001). In the FGS positive group 35% were positive for HPV infection, compared to 24 % in the FGS negative group (p=0.010). In the FGS positive group 37% were sero-positive for HSV infection, compared to 30% in the FGS negative group (p=0.079). There were significantly fewer chlamydia infections amongst women with FGS (20%, p=0.018) compared with those who did not have FGS (28%). Conclusions FGS was the second most common genital infection after HSV but the two were not significantly associated. HPV infection was significantly associated with FGS. Surprisingly Chlamydia infection were negatively associated with FGS. The results show the importance of the inclusion of FGS in the management protocols for genital infections in areas endemic for urinary schistosomiasis, and highlight the importance for more research on suitable differential diagnostic tools and disease management. Key messages box FGS was the second most common genital infection in this rural population after HSV. FGS was positively associated with HPV. FGS was negatively associated with genital chlamydia infections. FGS should be included in the syndromic management of genital infections.