Influenzavirus B

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Related to Influenza B virus: influenza virus, Influenza C virus

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.
References in periodicals archive ?
Universal influenza B virus genomic amplification facilitates sequencing, diagnostics, and reverse genetics.
Influenza B virus BM2 protein is an oligomeric integral membrane protein expressed at the cell surface.
Among all hospitalizations, 14,770 (86.4%) were associated with influenza A virus infection, 2,251 (13.2%) with influenza B virus infection, 43 (0.3%) with influenza A virus and influenza B virus coinfection, and 37 (0.2%) with influenza virus infection for which the type was not determined.
Among all hospitalizations, 484 (85.5%) were associated with influenza A virus infections, 80 (14.1%) with influenza B virus infections, and two (0.4%) with influenza A virus and influenza B virus coinfections.
The influenza B virus nonstructural NS1 protein is essential for efficient viral growth and antagonizes beta interferon induction.
An additional influenza B virus (B/Phuket/3073/2013like [B/Yamagata lineage]) was recommended for quadrivalent vaccines.
Influenza B virus prototype strains with good growth characteristics are usually obtained by direct and repeated passaging in embryonated eggs without attempting to generate reassortants.
Among 17,856 cases with influenza type specified, 15,271 (85.5%) were associated with influenza A and 2,473 (13.8%) with influenza B virus and 112 (0.6%) were associated with influenza A and influenza B coinfections; 55 had no virus type information available.
Testing of pH1N1, influenza A (H3N2), and influenza B virus isolates for resistance to neuraminidase inhibitors (oseltamivir and zanamivir) is performed at CDC using a functional assay.