Influenza A Virus

**Semantic type:** Virus

**Definition:** A negative-strand linear single-strand RNA virus with an 8 segment genome. Virions are enveloped and usually spherical or pleomorphic, 80-120 nm in diameter. Subtyping is based on the antigenic properties of the hemagglutinin and neuraminidase proteins. Influenza type A viruses can infect people, birds, pigs, horses, and other animals, but wild birds are the natural hosts for these viruses.

**Synonyms:** - FLUAV - INFLUENZA A VIRUS - INFLUENZA A VIRUS WHOLE - Influenza A - Not Typed - Influenza Type A - Influenza Virus Type A - influenza A virus