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Peer-reviewed veterinary case report

A new clade 2.3.4.4b H5N1 highly pathogenic avian influenza genotype detected in Europe in 2021.

Journal:
Archives of virology
Year:
2022
Authors:
Nagy, Alexander et al.
Affiliation:
State Veterinary Institute Prague
Species:
bird

Abstract

Despite their widespread distribution, only a single genotype variant of clade 2.3.4.4b H5N1 influenza viruses has been found so far in Europe. Here, we report the detection of a new highly pathogenic avian influenza H5N1 genotype in geese and ducks from a backyard farm in the Czech Republic. Phylogenetic analysis revealed that the Czech H5N1 virus retained the A/Eurasian_Wigeon/Netherlands/1/2020-like backbone with an altered PB2 segment obtained from co-circulating low-pathogenic avian influenza viruses.

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Original publication: https://pubmed.ncbi.nlm.nih.gov/35469095/