Abstract
Sampling of mallards in Alaska during September 2014–April 2015 identified low pathogenic avian influenza A virus (subtypes H5N2 and H1N1) that shared ancestry with highly pathogenic reassortant H5N2 and H5N1 viruses. Molecular dating indicated reassortment soon after interhemispheric movement of H5N8 clade 2.3.4.4, suggesting genetic exchange in Alaska or surrounds before outbreaks.
Highlights
Sampling of mallards in Alaska during September 2014– April 2015 identified low pathogenic avian influenza A virus that shared ancestry with highly pathogenic reassortant H5N2 and H5N1 viruses
Our sampling of mallards (Anas platyrhynchos) from urban ponds in Anchorage, Alaska, during September 2014–April 2015 identified low pathogenic avian influenza (LPAI) H5N2 and H1N1. These viruses were the closest relatives for 4 of the 8 North American segments that contributed to the H5Nx reassortants based on the time of most recent common ancestry analysis
All North American segments of the H5N2 reassortant shared most recent common ancestry with LPAI H5N2 that circulated in Anchorage mallards and a concurrently sampled wild bird population at Izembek National Wildlife Refuge in western Alaska [1]
Summary
Sampling of mallards in Alaska during September 2014– April 2015 identified low pathogenic avian influenza A virus (subtypes H5N2 and H1N1) that shared ancestry with highly pathogenic reassortant H5N2 and H5N1 viruses. Our sampling of mallards (Anas platyrhynchos) from urban ponds in Anchorage, Alaska, during September 2014–April 2015 identified LPAI H5N2 and H1N1
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