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In order to determine the actual prevalence of avian influenza virus (AIV) and Newcastle disease virus (NDV) in ducks in Shandong province of China, extensive surveillance studies were carried out in the breeding ducks of an intensive farm from July 2007 to September 2008. Each month cloacal and tracheal swabs were taken from 30 randomly selected birds that appeared healthy. All of the swabs were...
According to our previous study of the M genes of H9N2 avian influenza viruses (AIV) in infected chickens, A/Quail/Hong Kong/G1/97 (G1 97)-like M genes newly emerged in northern and eastern China in addition to the existing A/chicken/Hong Kong/Y280/97 (Y280)-like lineage M genes. To systematically track the genesis and evolution of H9N2 viruses in this region, whole genome sequences of seventeen H9N2...
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