Canadian Medical Guide > Organisms > Viruses > RNA Viruses > Orthomyxoviridae Terms and Definitions

Orthomyxoviridae

Medical Definition:	A family of RNA viruses causing INFLUENZA and other diseases. There are four recognized genera: INFLUENZAVIRUS A; INFLUENZAVIRUS B; INFLUENZAVIRUS C; and THOGOTOVIRUS.
Guide Notes:	infection = ORTHOMYXOVIRIDAE INFECTIONS
Also Called:	Myxoviruses

Orthomyxoviridae Categories.

	Influenzavirus A - A genus in the family ORTHOMYXOVIRIDAE causing INFLUENZA and other diseases in humans and animals. It contains many strains as well as antigenic subtypes of the integral membrane proteins hemagglutinin (HEMAGGLUTININS) and NEURAMINIDASE. The type species is INFLUENZA A VIRUS.
	Influenzavirus B - A genus of the family ORTHOMYXOVIRUS causing INFLUENZA and other diseases primarily in humans. In contrast to INFLUENZAVIRUS A, no distinct antigenic subtypes of hemagglutinin (HEMAGGLUTINS) and NEURAMINIDASE are recognized.
	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.
	Thogotovirus - A genus of the family ORTHOMYXOVIRIDAE comprising tick-borne viruses occasionally infecting humans. Dhori and Thogoto viruses were formerly thought to be members of BUNYAVIRIDAE. Thogoto virus is the type species.

Orthomyxoviridae Medical Definitions and Terms

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