Trematode larval infections in snails collected from aquaculture ponds in Ha Noi and Yen Bai, Vietnam

The hot-spots of transmission food-borne zoonotic trematodes in northern Vietnam have been known as the integrated fish-livestock (VAC- Garden, Fish pond, Poultry shed) ponds. A cross-sectional study was conducted Ha Noi capital and Yen Bai province to investigate trematode larval infections (cercariae) freshwater snails these areas. Snails were collected from 35 VAC ponds, including 25 grow-out 10 nursery total 13,895 specimens 12 snail species examined for cercariae shedding. Six Melanoides tuberculata, Tarebia granifera, Radix auriculata, Gyraulus convexiusculus, Bithynia fuchsiana Parafosarulus manchouricus, shed cercariae. Seven cercarial types detected. amount prevalent infection ponds 1.14 1.3 times higher than respectively. Thus, are still hot-spot infection.