title: Isolation and characterization of influenza a viruses from wild free-flying ducks in Hokkaido, Japan.
abstract: Three influenza A viruses possessing hemagglutinin-Hav7 and neuraminidase-N2 were isolated from 20 wild free-flying ducks in Hokkaido, Japan in autumn, 1977. The neuraminidase antigen of these viruses cross-reacted with the Asian influenza virus (H2 N2) but reacted scarcely with the Hong Kong strain (H3 N2Y in cross neuraminidase-inhibition tests.
mesh_terms: D000818:Animals; D000956:Antigens, Viral; D001715:Bird Diseases / Q000276:immunology; D003429:Cross Reactions; D004372:Ducks / Q000382:microbiology*; D009980:Influenza A virus / Q000302:isolation & purification*; D007564:Japan; D009439:Neuraminidase / Q000378:metabolism; D009976:Orthomyxoviridae Infections / Q000276:immunology
chemical_list: D000956:Antigens, Viral; D009439:Neuraminidase