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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.
No one knows if these or other symptoms will be the symptoms of a humanized H5N1 flu. Highly pathogenic H5N1 avian influenza in a human appears to be far worse, killing over 50% of humans reported infected with the virus, although it is unknown how many cases (with milder symptoms) go unreported. In one case, a boy with H5N1 experienced ...
A/H7N9 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. [2] Symptoms of A/H7N9 influenza vary according to both the strain of virus underlying the infection and on the species of bird or mammal affected.
H5 N2 is a subtype of the species Influenzavirus A (avian influenza virus or bird flu virus). The subtype infects a wide variety of birds, including chickens, ducks, turkeys, falcons, and ostriches. Affected birds usually do not appear ill, and the disease is often mild as avian influenza viral subtypes go.
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]
A five-year-old boy from Luang Prabang Province tested positive after being exposed to poultry. [13] At least 16 isolated cases were reported in China between July and September 2021, including a case in a 26-year-old woman from Guilin who died. A 61-year-old woman who was infected in July has denied ever coming into contact with poultry.
Thousands of birds and animals were being culled in Germany to stop the spread. [11] In the United Kingdom the flu was found in a wild duck at a turkey farm in Lincolnshire. [12] In South Korea, a record total of 18.4 million birds had been killed by December since the first outbreak of avian flu was reported at a farm on Nov. 18. [13]
Bird flu is a scary illness with a high mortality rate. But so far, infections in the U.S. have been relatively mild—until now. A patient in Louisiana has been hospitalized with a severe case of ...