Prevalence of Gastrointestinal Helminths of Aigamo Ducks in Hokkaido, Japan

Gastrointesitnal helminths of four age groups of Aigamo ducks, a cross between wild ducks (Anas platyrhynchos) and domestic ducks (Anas platyrhynchos domesticus), were investigated in Hokkaido, Japan. A total of five helminth species, namely Amidostomum acutum, Echinostoma revolutum, Aploparaksis sp., Hymenolepis sp., and Fimbriaria sp. were obtained and identified from 37.84% of 37 individuals of Aigamo duck. Among the above, A.acutum, Aploparaksis sp. and Hymenolepis sp. are the first host record from Aigamo ducks in Japan. And the present result suggested that the parasites, including high pathogenic and/or zoonotic species, passed from wild ducks to Aigamo ducks at outfield rearing period.