| influenzavirus a, b | A genus of orthomyxoviridae containing two major species (influenza a virus and influenza b virus) but many strains. A distinguishing feature is the various combinations of subtypes of the integral membrane glycoproteins haemagglutinin and neuraminidase. Hosts include several species of mammals and birds, with some interspecies transmission likely. The type species is influenza a virus. (12 Dec 1998) |
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| influenzavirus c | A genus of the family orthomyxoviridae comprising viruses similar to types a and b but less common, more stable, more homogeneous, and lacking the neuraminidase protein. They have not been associated with epidemics but may cause mild influenza. Influenza c virus is the type species. (12 Dec 1998) |