Geographical distribution of the snail hosts of Schistosomiasis mansoni in northeastern Brazil.
D000818:Animals; D001938:Brazil; D004197:Disease Reservoirs; D004199:Disease Vectors; D006801:Humans; D012547:Schistosoma / Q000302:isolation & purification*; D012552:Schistosomiasis / Q000453:epidemiology; D012908:Snails