Influenza A Subtypes and the Species Affected
Influenza A viruses are divided into subtypes based on two proteins on the surface of the virus: the hemagglutinin (H) and the neuraminidase (N). There are 18 different hemagglutinin subtypes and 11 different neuraminidase subtypes. All known subtypes of influenza A viruses have been found among birds, except subtype H17N10 and H18N11 which have only been found in bats. Below is a table showing the different hemagglutinin and neuraminidase subtypes and the species in which they have been detected.
|Subtype||People||Poultry||swine||Bats / Other|
|H3||people icon||Other Animals|
|H7||people icon||Other Animals|
|Subtype||People||Poultry||Pigs||Bats / Other|
|N7||people icon||Other Animals|
|N8||people icon||Other Animals|