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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.
Avian influenza, or bird flu, is a broad term that refers to several types of influenza that normally infect birds. The bird flu that’s been making news in the United States is a virus called ...
The United States is ground zero for the H5N1 bird flu. Since March 2024, when the virus was first reported in a Texas dairy herd, the virus has killed one person, sickened scores more ...
A/H5N1 virus can also infect mammals (including humans) that have been exposed to infected birds; in these cases, symptoms are frequently severe or fatal. [2] A/H5N1 virus is shed in the saliva, mucus, and feces of infected birds; other infected animals may shed bird flu viruses in respiratory secretions and other body fluids (such as milk). [3]
Symptoms of H5N1 bird flu. The symptoms of H5N1 bird flu usually depend on how much someone was infected with the virus and how large a dose of the virus they have in their bodies, Dr. Schaffner says.
A highly pathogenic strain of H5N9 caused an outbreak in 1966 in Ontario and Manitoba, Canada in turkeys, resulting in the slaughter of approximately 8,000 birds. [3] [4] In 1999 an H5 influenza A virus was isolated from a mallard in the Netherlands. [5] In 2008 An H5N9 virus was isolated from poultry in Aomori, Japan. [6]
Bird flu, also known as highly pathogenic avian influenza (HPAI), is caused by a virus that can result in serious illness and death in birds and mammals. The virus has been around for decades, and ...
The virus was first detected in poultry in 2013, since then spreading among wild bird populations and poultry around the world. Humans can be infected through unprotected contact with infected birds or contaminated surfaces. The virus transmits by getting into a person's eyes, nose, mouth, and through inhalation. Human infections are rare.