pathogenicity of an h5n1 highly pathogenic avian influenza virus isolated in the 2010-2011 winter in japan to mandarin ducks.widespread outbreaks of highly pathogenic avian influenza (hpai) caused by h5n1 viruses occurred in wild birds in japan from 2010-2011. forty out of 63 deceased wild birds belonged to the order anseriformes, and mandarin duck was one of the dominant species. to estimate the risk of mandarin ducks as a source of virus infection in the environment, we examined the pathogenicity of a causal h5n1 hpai virus to mandarin ducks. about half of the mandarin ducks died by inoculation with 10(7.0)tcid50 of ...201323318574
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