Distribution of the intermediate hosts of bilharziasis in relation to hydrography; with special reference to the Nile Basin and the Sudan.
D000818:Animals; D001700:Biomphalaria; D002033:Bulinus; D006801:Humans; D012552:Schistosomiasis / Q000453:epidemiology*; D012908:Snails; D013397:Sudan
SCHISTOSOMIASIS/epidemiology; SNAILS