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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. [1] Wild aquatic birds are the primary host of the influenza A virus, which is enzootic (continually present) in many bird populations.
Influenza A virus subtype H5N1 (A/H5N1) is a subtype of the influenza A virus, which causes the disease avian influenza (often referred to as "bird flu"). It is enzootic (maintained in the population) in many bird populations, and also panzootic (affecting animals of many species over a wide area). [1]
What we think of as the seasonal flu in humans is caused by types A and B. Bird flu falls under the umbrella of influenza A viruses. The strain currently spreading in the U.S. is H5N1, an HPAI ...
A bird-adapted strain of H5N1, called HPAI A(H5N1) for "highly pathogenic avian influenza virus of type A of subtype H5N1", is the causative agent of H5N1 flu. HPAI A(H5N1) is considered an avian disease, although there is some evidence of limited human-to-human transmission of the virus. [2]
Bird flu can also cause respiratory and classic flu-like symptoms, including cough, runny nose, fever, sore throat, body aches, headaches, fatigue, shortness of breath, and pneumonia, the CDC says ...
Bird flu, a.k.a. H5N1, has dominated headlines in the U.S. for months.But while this illness is known worldwide for having a high mortality rate, the vast majority of infections in America have ...
Influenza A virus subtype H7N9 (A/H7N9) is a subtype of the influenza A virus, which causes influenza (flu), predominantly in birds. It is enzootic (maintained in the population) in many bird populations. [1] The virus can spread rapidly through poultry flocks and among wild birds; it can also infect humans that have been exposed to infected ...
In the U.S., there have been a total of 68 cases of human bird flu, according to the latest data from the U.S. Centers for Disease Control and Prevention (CDC).