Avian influenza or bird flu refers to the disease caused by infection with avian (bird) influenza (flu) Type A viruses. These viruses naturally spread among wild aquatic birds worldwide and can infect domestic poultry and other bird and animal species. Avian flu definition obtained from the CDC Website.
Poultry Diseases: Where to Get Help (Pennsylvania State University)
Avian Influenza (Pennsylvania Game Commission)
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