The epidemiology investigation on animal schistosomiasis in whole city and test countryside,such as Chuanxing,Daxing and Mopan,was done to provide a theoretical foundation for the schistosomiasis control strategy in Xichang.The distribution and infection rate of oncomelania in test countryside were also investigated.The results showed that the cattle had the highest infection rate,but the pigs,horses,sheep and dogs were not infected;the infected crest-time occurred in summer and autumn,especially in May.The...