Infection status of zoonotic trematode metacercariae in Sutchi catfish (Pangasianodon hypophthalmus) in Vietnam: Associations with season, management and host age

摘要: The occurrence of four species potentially zoonotic trematode metacercariae in Sutchi catfish Pangasianodon hypophthalmus from provinces the Mekong Delta Southern Vietnam is reported. A total 1127 fish were collected pond cultures comprising farm house systems (FHS) (279) and household (FHHS) (848) examined by classical molecular methods. Haplorchis pumilio, H. taichui, Centrocestus formosanus Procerovum sp. detected infections analysed relation to season, management type, host size infection site tissue. Generally, prevalences higher during rainy season April October when compared dry season. rates densities lower fishes FHHS than FHS. Fish at an age 61 90 days post-hatch showed highest parasite loads reflecting presence a continuous risk ponds following stocking. parasites found body musculature, head, fins especially base fins. importance farming increasing both local international markets practices farms industrial processing may reduce levels thereby improve food hygienic standard products.