Trematode Infection in a Freshwater Snail (Gastropoda: Bithyniidae) in Thailand.

1,024 individuals of were collected from 12 different localities in eight provinces from north, west, and central regions of Thailand. The infection of parasitic trematodes was investigated using shedding and crushing methods to search for cercariae and metacercariae. Trematode infection was found at a relatively low prevalence of 5.57%. Five different morphological types of cercariae were detected; xiphidio, monostome, mutabile, ophthalmoxiphidio, and microcercous, and three different morphological types of unknown metacercariae were observed. Microcercous cercariae of the lung fluke genus is reported here for the first time in a bithyniid snail. Our current finding show that can serve as intermediate host for a range of parasitic trematodes in Thailand.