Influenza A Virus, H5N1 Subtype

**Definition:** A subtype of INFLUENZA A VIRUS comprised of the surface proteins hemagglutinin 5 and neuraminidase 1. The H5N1 subtype, frequently referred to as the bird flu virus, is endemic in wild birds and very contagious among both domestic (POULTRY) and wild birds. It does not usually infect humans, but some cases have been reported.

**Tree numbers:** - B04.820.480.968.405.400.500

**Synonyms:** - Avian Influenza A(H5N1) Virus - H5N1 - H5N1 Avian Influenza Virus - H5N1 Bird Flu Virus - H5N1 Influenza Virus - H5N1 subtype - H5N1 Virus - Influenza A(H5N1) Virus