title: The effect of snail surveillance in natural waterways on the transmission of Schistosoma haematobium in Rhodesia.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D006801:Humans; D012552:Schistosomiasis / Q000517:prevention & control*; D012908:Snails; D015030:Zimbabwe