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Bird flu, also called avian influenza, is caused by influenza type A virus infections in bird species. Depending on the strain, bird flu may cause the bird to have no symptoms, mild illness, serious illness or lead to the death of the bird.
Avian influenza, commonly called “bird flu,” is a viral infection that usually spreads in birds but can sometimes spread to humans. Influenza A(H5N1) is the most common cause in humans. It can cause severe respiratory symptoms.
Bird flu (avian influenza) is a flu virus that typically affects birds, but in rare cases can spread to other animals and humans.
Most avian influenza A viruses are low pathogenic and cause few signs of disease in infected wild birds. In poultry, some low-pathogenic viruses can mutate into highly pathogenic avian influenza viruses.
Avian influenza A (bird flu) viruses may be transmitted from infected birds to other animals, and potentially to humans, in two main ways: Directly from infected birds or from avian influenza A virus-contaminated environments. Through an intermediate host, such as another animal.
Avian influenza. Appearance. "Bird flu" redirects here. For the M.I.A. song, see Bird Flu.
Avian influenza refers to disease in birds caused by infection with avian (bird) influenza (flu) Type A viruses. Causes Avian influenza A viruses have been isolated from more than 100 different species of wild birds around the world.
"Avian influenza A (H5N1)," "bird flu," and "H5N1 bird flu" all refer to an illness caused by influenza type A viruses, which primarily affect birds. H5N1 bird flu was first identified in geese in China in 1996 and in people in Hong Kong the following year.
Can avian influenza viruses spread between humans? WHO questions and answers page on avian influenza (H5N1), including symptoms, treatments and prevention.
Overview. There are 4 types of influenza viruses, types A, B, C and D. Influenza A and B viruses circulate and cause seasonal epidemics of disease in humans although only type A viruses can cause global pandemics based on current knowledge and understanding. Influenza A viruses are established in many animal species.