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We isolated nineteen strains of H9N2 influenza virus from farms across five northern Chinese provinces between 2001 and 2012. Sequence analysis of the genes for the two surface glycoproteins revealed that residue 226 of the hemagglutinin (HA) of eight isolates was a leucine. A T300I mutation in three strains resulted in the loss of a potential glycosylation(More)
In 2010, an H4N6 avian influenza virus (AIV) was isolated and identified from healthy ducks in a waterfowl market in Shandong Province in the northern China. This virus was named A/duck/Shandong/1/2010 (H4N6) (DK/SD/1/2010 hereafter). The gene sequence of the virus was determined, and genetic and evolutionary analyses were conducted by combining related(More)
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