Fig 2. Photographs of study sites, snail specimens and human activities on study sites.

Photograph of a free-flowing freshwater contact site (A). Photographs of snail communities on a rocky surface along water bodies (B). Snail assemblages on a plantain stem submerged in a shallow stream (C). Photographs of some snails collected during sampling events (D), Melanoides sp. (D1), Bulinus sp. (D2), Indoplanorbis sp. (D3), Physa sp. (D4) and Lymneae sp. (D5). Detailed photo of the snail host Bulinus camerunensis (E) and Bulinus truncatus (F) responsible for Schistosoma infection. A photo of human contact activity (here, a man fetching water for domestic purposes) (G). Photo of Indoplanorbis sp. inside a free-flowing fresh water (H).