US - The H5 avian influenza A virus that devastated North American poultry farms in 2014-15 was initially spread by migratory waterfowl, but evidence suggests such highly pathogenic flu viruses do not persist in wild birds.
While wild ducks and other aquatic birds are known to be natural hosts for low pathogenic flu viruses associated with milder symptoms, the results of this study indicate that is not the case with the highly pathogenic flu viruses that are associated with more severe illness.
In this study, researchers analysed samples taken from 22,892 wild ducks and other aquatic birds collected before, during and after a 2014-15 H5 flu outbreak in poultry.
The outbreak has been linked to a highly pathogenic H5N8 influenza A virus spread from Asia to North America by migratory waterfowl, which after mixing genes with other viruses went on to trigger 248 flu outbreaks in commercial and backyard turkey and poultry farms in the US and Canada at a cost of nearly $5 billion.
Officials worried that the highly pathogenic virus would be re-introduced into poultry farms by migratory aquatic birds carrying the virus. But none of the migratory birds included in this analysis were infected with a highly pathogenic flu virus.
HAPA CHINI KWENYE TANGAZO NDANI TUMEKUWEKEA VIDEO YA DAKIKA KUMI NA SITA BABA HUYO AKIWA ANWAELEZEA POLISI JINSI ANAVYOMNYONYA MANGE KUMA USIKU WAKIWA WAMELALA...BONYEZA TANGAZO NA UITAZAME
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