Abstract
In 2011, four H3N2 swine influenza viruses (SIVs) were isolated from nasal swabs of four pigs (800 nasal swabs were collected from pigs showing influenza-like symptoms) in Guangdong province, China. Four different genotypes of H3N2 appeared among pigs in southern China, including wholly human-like H3N2 viruses, intermediate (1975) double-reassortant human H3N2 viruses (resulting from reassortment between an early human lineage and a recent human lineage), recent double-reassortant human H3N2 viruses, and avian-like H3N2 viruses. Because pigs can support the reassortment of human and avian influenza viruses, our surveillance should be enhanced as a part of an overall pandemic preparedness plan.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Amino Acid Sequence
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Animals
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Base Sequence
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China
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Hemagglutinin Glycoproteins, Influenza Virus / genetics*
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Humans
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Influenza A Virus, H1N1 Subtype / genetics*
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Influenza A Virus, H3N2 Subtype / genetics*
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Influenza A Virus, H3N2 Subtype / isolation & purification
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Influenza, Human / virology
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Molecular Sequence Data
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Orthomyxoviridae Infections / diagnosis
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Orthomyxoviridae Infections / veterinary
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Orthomyxoviridae Infections / virology*
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Reassortant Viruses / genetics*
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Reassortant Viruses / isolation & purification
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Sequence Analysis, RNA
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Swine
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Swine Diseases / diagnosis
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Swine Diseases / virology
Substances
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Hemagglutinin Glycoproteins, Influenza Virus