[Epidemiological importance of Oncomelania snail in marshlands in and along Yangtze River in the spread of schistosomiasis japonica in Jiangsu Province].
D000818:Animals; D002681:China; D004199:Disease Vectors; D006801:Humans; D012552:Schistosomiasis / Q000517:prevention & control / Q000635:transmission*; D012908:Snails / Q000469:parasitology*; D013997:Time Factors