Abstract:
:Clade 2.3.4.4 H5N8 highly pathogenic avian influenza viruses (HPAIVs) have spread worldwide. Phylogenetic analysis identified two genetic groups of the H5N8 HPAIVs in South Korea; group A evolved further into four subgroups. Here, we examined the zoonotic potential, both in vivo and in vitro, of genetically distinct subgroups of H5N8 HPAIVs isolated in South Korea. When compared with other subgroups, A/mallard/Korea/H2102/2015 (H2102) virus caused relatively severe disease in mice at high doses. In ferrets, all H5N8 viruses replicated restrictively in the respiratory tract and did not induce significant clinical signs of influenza infection. In vitro studies, all viruses displayed a hemagglutinin phenotype that was poorly adapted for infection of mammals, although the H2102 virus exhibited higher replication kinetics at 33°C than the others. Although H5N8 HPAIVs have not yet acquired all the characteristics required for adaptation to mammals, their ability to evolve continuously underscores the need for timely risk assessment.
journal_name
Virologyjournal_title
Virologyauthors
Lee YN,Lee EK,Song BM,Heo GB,Woo SH,Cheon SH,Lee YJdoi
10.1016/j.virol.2017.12.037subject
Has Abstractpub_date
2018-03-01 00:00:00pages
38-45eissn
0042-6822issn
1096-0341pii
S0042-6822(17)30450-6journal_volume
516pub_type
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