Canadian Medical Guide > Organisms > Viruses > RNA Viruses > Orthomyxoviridae > Influenzavirus A > Influenza A virus Terms and Definitions

Influenza A virus

Medical Definition:	The type species of the genus INFLUENZAVIRUS A that causes INFLUENZA and other diseases in humans and animals. Antigenic variation occurs frequently between strains, allowing classification into subtypes and variants. Transmission is by aerosol (human and most non-aquatic hosts) or waterborne (ducks).
Guide Notes:	infection: coord IM with ORTHOMYXOVIRIDAE INFECTIONS (IM) or with INFLUENZA (IM); INFLUENZAVIRUS A is also available
Also Called:	Influenza Virus, Equine
Previously Indexed:	Orthomyxoviridae (1968-1976)

Influenza A virus Categories.

	Influenza A Virus, Avian - Strains of INFLUENZA A VIRUS causing influenza in birds. Transmission is caused by close contact or is waterborne in aquatic species.
	Influenza A Virus, Human - Strains of INFLUENZA A VIRUS causing influenza and sometimes pneumonia in humans. Transmission is by aerosol.
	Influenza A Virus, Porcine - Strains of INFLUENZA A VIRUS causing influenza and pneumonia in domestic pigs.

Influenza A virus Medical Definitions and Terms

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