An H3N2 subtype swine influenza virus,A/Swine/ Guangdong/01/2005(H3N2),was isolated from pigs with influenza-like signs in Guangdong province in 2005. Reverse transcription-polymerase chain reaction (RT-PCR) was used to amplify the gene segments for sequencing analysis. Phylogenetic analysis showed that the hemagglutinin(HA) gene of A/Swine/ Guangdong/01/2005 shared high degree of sequence identity with those of H3N2 viruses isolated from swine in Guangdong province from 2003 to 2004 and H3N2 viruses isolat...

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