Epidemiological Survey of Schistosomiasis in Zanzibar

A cross-sectional survey of schistosomiasis was carried out in Pemba Island, Zanzibar from 2017 to 2019. The overall infection rate was 1.84% (353/19,194, 95% CI: 1.65%-2.03%). A total of 73.53% of shehia (50/68) were found to be infected with schistosomiasis, and the highest infection rate reached 18.77%. The infection rate of children aged 6-18 was 2.76%. The student infection rate was 2.2%, higher than other occupations. The infection rate of primary school students is 2.41%. There were statistically significant differences in the infection rate among regions, age groups, occupations, and education levels. Snail habitats were mainly found in stream (79.22%). Positive snail habitats were mainly found in stream (51.43%). Control measures must be strengthened in high infection areas and groups. Snail monitoring and control should be intensified in the future.