Influenzavirus A

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Influenzavirus

 [in″floo-en´zah-vi″rus]
former genus name for the viruses that cause influenza, now found to be two different genera, which were named influenzavirus A and influenzavirus B.
Influenzavirus A a genus of viruses containing the agent of influenza A. See also influenza virus.
Influenzavirus B a genus of viruses containing the agent of influenza B. See also influenza virus.
Influenzavirus C a genus of viruses containing the agent of influenza C. See also influenza virus.

Influenzavirus A

/In·flu·en·za·vi·rus A/ (in″floo-en´zah-vi″rus) a genus of viruses of the family Orthomyxoviridae containing the agent of influenza A. See influenza virus, under virus> .

Influenzavirus A

a genus of viruses of the family Orthomyxoviridae containing the agent of influenza A. It is usually the cause of epidemics and pandemics. It is divided into subgroups based on two surface proteins: neuraminidase and haemoglutinin. Vaccination against influenza A is available. See also influenza.
References in periodicals archive ?
Type A influenza viruses are further typed into subtypes according to different kinds and combinations of virus surface proteins.
The newly approved quadrivalent vaccine contains two strains of type A influenza (A/H1N1 and A/H3N2) and two type B strains, a Yamagata lineage strain and a Victoria lineage strain.
The company is building on the previously successful animal model study where mice infected with H1N1 type A influenza virus were given two doses of the L-A nRNA product and all survived while control and placebo dosed mice all died within six days.
Such candidates would be vaccines that enable the identification of field-exposed flocks through the detection of antibodies to an antigen that is common to all type A influenza viruses such as NP, M, or NS1.
A 17-year-old boy from West Los Angeles was diagnosed with a case of highly contagious type A influenza on Christmas Eve, the chief of the county's acute communicable disease control unit said Monday.
In comparison to type A influenza viruses, type B viruses have been isolated later in the season and less frequently worldwide.
CSA-13 has also undergone in vitro testing at a major university in the United States where it showed the ability to prevent influenza infection by H3N2, one of the common strains of Type A influenza.
Impact of epidemic type A influenza in a defined adult population.
When compared with type A influenza, type B viruses have been isolated less frequently worldwide; influenza type B isolates were first reported in association with sporadic activity in China, Hong Kong, and Thailand during October and November.
SAN DIEGO -- Quidel Corporation (Nasdaq:QDEL), a leading provider of rapid point-of-care (POC) diagnostic tests, reported today that a clinical study to further validate the performance of its 10-minute diagnostic test for influenza, the QuickVue(R) Influenza A+B test, showed 96% sensitivity (true positive identification) and 97% specificity (true negative identification) in detecting Type A influenza.
Development of a real-time reverse transcriptase PCR assay for type A influenza virus and the avian H5 and H7 hemagglutinin subtypes.
All type A influenza viruses, including those that regularly cause seasonal epidemics of influenza in humans, are well adapted to elude host defenses.