ArticleArchives of virology2024
Molecular characterisation of novel reassortants of the G57 genotype of low-pathogenic avian influenza H9N2 virus isolated from poultry farms in Malaysia.
Article in Archives of virology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
In late 2017, Malaysia reported repeated outbreaks of low-pathogenic avian influenza virus (LPAI) H9N2 infections in commercial poultry flocks. Two H9N2 viruses, A/chicken/Malaysia/Negeri Sembilan/UPM994/2018 and A/chicken/Malaysia/Johore/UPM2033/2019, which were isolated from breeder and layer flocks in Peninsular Malaysia, were characterised in this study. Phylogenetic analysis revealed that both viruses were multiple-genotype reassortant strains with genes originating from Y280-like (HA gene), F/98-like (NS, NP and PA), G1-like (M and PB2), and Korean-like (PB1) lineages, indicating that they belong to a novel genotype that is divergent from the G57 lineage of Chinese origin. Both isolates were predicted to have a dibasic cleavage site (333-PSRSSRGLF-341) in the HA gene cleavage locations. Thus, the novel Malaysian H9N2 strain is a Y280-like virus resembling H9N2 isolates from Indonesia, Taiwan, Japan, and Cambodia. This virus is of the G57 lineage but has a novel genotype of the PB1 gene originating from a Korean-lineage H9N2 virus, which has not been detected before in the region.
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