schistosoma ovuncatum n. sp. (digenea: schistosomatidae) from northwest thailand and the historical biogeography of southeast asian schistosoma weinland, 1858.schistosoma sinensium bao, 1958 was first isolated from an unidentified snail in sichuan province, pr china. this species was apparently rediscovered in chiang mai province, northwest thailand (baidikul et al., 1984); the definitive host was the rat rattus rattus and the intermediate host was the snail tricula bollingi. in this paper s. sinensium is rediscovered in sichuan province and compared with worms recovered from experimentally infected mice, which had been exposed to cercariae shed by t. ...200211721191
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