2551 Wongsawat () to study dynamics of family Heterophyidae fluke infection in some aquatic species in PA sang, Lamphun province. Mae taeng District, in Chiang Mai, and the larvae on the leaves, while metacercariae 4 species.Taichui.Haplorchoides SP, Stellantchasmus falcatus Centrocestus caninus and winter season was the highest overall prevalence, followed by the rainy season and summer. Equals, and 90.2% 90.0% 79.2% respectively. The MAE taeng District, found stage metacercariae. All 3 type is Haplorchis, taichuiHaplorchoides sp. And Centrocestus caninus by winter and rainy season, summer is equal 90.9% equals 90.3% which is different from the study. Nithikathkul (2008) found that the prevalence of sporadic infection were highest in summer, lowest in the winter.
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