?:definition
|
-
infection caused by influenza A viruses that occur naturally in birds; wild birds can carry the viruses, but usually do not get sick from them; some domesticated birds, including chickens, ducks, and turkeys, can become infected, often fatally; one strain of avian influenza, the H5N1 virus, may infect various types of animals, including wild birds, pigs, and tigers; symptoms in birds and other animals vary, but virulent strains can cause death within a few days; human H5N1 infection was first recognized in 1997 in Hong Kong.
|