Avian influenza
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Avian influenza, also known as avian flu or bird flu, is a disease caused by the influenza A virus, which primarily affects birds but can sometimes affect mammals including humans. Wild aquatic birds
A transmission electron micrograph (TEM) of the reconstructed 1918 pandemic influenza virus. The bottom structure represents membrane debris from the cells used to amplify the virus.
Sign in Central Park in New York City advising against handling birds
Birds affected by highly pathogenic avian influenza (HPAI) could show swelling of the head, wattles, combs, and face. USDA photo.
Purple discoloration of the comb could indicate highly pathogenic avian influenza (HPAI). USDA photo.
Chicken
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The chicken is the domesticated form of the red junglefowl, originally native to Southeast Asia. It was first domesticated around 8,000 years ago and is one of the most common and widespread domestica
Avian influenza
…virus strain as either low pathogenic avian influenza (LPAI) or high pathogenic avian influenza (HPAI) is based on the severity of symptoms in domestic chickens and does not predict severity of symptoms in other species. Chickens infected with LPAI display mild symptoms or are asymptomatic, whereas HPAI causes…
Male and female chicken sitting together
lossy page 1 GLW 2 global distributions of c chickens.tif
Comb and wattles of male
Comb of female, generally smaller