Influenza A Virus, H9N2 Subtype

**Definition:** A subtype of INFLUENZA A VIRUS comprised of the surface proteins hemagglutinin 9 and neuraminidase 2. The H9N2 subtype usually infects domestic birds (POULTRY) but there have been some human infections reported.

**Tree numbers:** - B04.820.480.968.405.400.900

**Synonyms:** - Avian Influenza A(H9N2) Virus - H9N2 - H9N2 Bird Flu Virus - H9N2 Influenza Virus - H9N2 subtype - H9N2 Virus - Influenza A(H9N2) Virus