title: Wild birds most likely source of UK avian influenza cases.
mesh_terms: D000818:Animals; D000835:Animals, Wild; D001717:Birds; D002645:Chickens; D004196:Disease Outbreaks / Q000662:veterinary*; D004372:Ducks; D005585:Influenza in Birds / Q000453:epidemiology*; D006113:United Kingdom / Q000453:epidemiology