Cdc protocol of realtime rtpcr for influenza ah1n1 28 april 2009. Rna1 rna2 rna3 rna4 rna5 rna6 rna7 genome proteome host host human cell tropism epithelial respiratory cells interactions cell receptors. Pdf influenza is a highly contagious acute viral infection of the respiratory tract. Influenza d viruses primarily affect cattle and are not known to infect or cause illness in people. Influenza is a highly contagious acute viral infection of the res piratory tract. Type b influenza can be just as severe as type a influenza but is less common throughout the flu season compared to type a. They are more closely related to each other than to influenza virus a iva or influenza virus b ivb, containing seven genomic segments and a hemagglutininesterase he. Influenza a viruses are divided into subtypes based on two proteins on the surface of the virus. Influenza a virus is a highly mutable virus with frequent antigenic drift and occasional antigenic shift. Collaborating centre for influenza at cdc atlanta, united states of america, has made available the protocol, attached, of realtime rtpcr for influenza ah1n1. Creative commons attributionnoncommercialsharealike license.
Infec tion occurs at all ages, but during epidemics the morbidity is higher at extremes of life. Type c influenza usually only causes mild respiratory infections. Una vez reconstituida debe ser inyectada lo antes posible. Virus influenza e o organismo humano influenza virus.
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