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




Influenzavirus B

Medical Definition: 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.
Guide Notes: infection: coord IM with ORTHOMYXOVIRIDAE INFECTIONS (IM) or INFLUENZA (IM); INFLUENZA B VIRUS is also available
Previously Indexed: Orthomyxoviridae (1997-2001)
Influenzavirus B Categories.
Canadian Medical Guide Definition Influenza B virus - Species of the genus INFLUENZAVIRUS B that cause INFLUENZA and other diseases primarily in humans. Antigenic variation is less extensive than in type A viruses (INFLUENZA A VIRUS) and consequently there is no basis for distinct subtypes or variants. Epidemics are less likely than with INFLUENZA A VIRUS and there have been no pandemics. Previously only found in humans, Influenza B virus has been isolated from seals which may constitute the animal reservoir from which humans are exposed.

Influenzavirus B Medical Definitions and Terms

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