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Movement of Bird Flu from Asia to North America Via Birds Confirmed
Samples containing viruses were then analysed and compared to virus samples taken from other birds in North America and Eastern Asia where northern pintails are known to winter.
The researchers said that none of the samples was found to contain completely Asian-origin viruses.
They also said that none of the samples contained completely Asian-origin viruses, and none were highly pathogenic forms that have caused deaths of domestic poultry and humans.
"This kind of genetic analysis - using the low pathogenic strains of avian influenza virus commonly found in wild birds - can answer questions not only about the migratory movements of wild birds, but the degree of virus exchange that takes place between continents, provided the right species and geographic locations are sampled," said John Pearce, a research wildlife biologist with the USGS Alaska Science Center and co-author of the study.
"Furthermore, this research validates our current surveillance sampling process for highly pathogenic avian influenza in Alaska and demonstrates that genetic analysis can be used as an effective tool to further refine surveillance plans across North America," Pearce added.
Based on their observations, the researchers came to the conclusion that future surveillance for avian influenza in wild birds should include the type of genetic analyses used in the current study to better understand patterns of migratory connectivity between Asia and North America and virus ecology.
Source-ANI
RAS/L
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