Eight influenza virus A strains were isolated from 269 cloacal swabs taken from wild ducks (Anas platyrhynchos), shot during their autumn migrations in the years 1978-1981. One strain was identified as subtype A-H3N8N6 (Hav7Neq2Nav1), the remaining seven as subtype A-H4N6 (Hav4Nav1).
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