Sequence characteristics and phylogenetic analysis of H9N2 subtype avian influenza A viruses detected from poultry and the environment in China, 2018.

ABSTRACT: H9N2 subtype avian influenza A virus (AIV) is a causative agent that poses serious threats to both the poultry industry and global public health. In this study, we performed active surveillance to identify H9N2 AIVs from poultry (chicken, duck, and goose) and the environment of different regions in China, and we phylogenetically characterized the sequences. AIV subtype-specific reverse transcription polymerase chain reaction (RT-PCR) showed that 5.43% (83/1529) samples were AIV positive, and 87.02% (67/77) of which were H9N2 AIVs. Phylogenetic analysis revealed that all H9N2 field viruses belonged to the Y280-like lineage, exhibiting 93.9-100% and 94.6-100% of homology in the hemagglutinin (HA) gene and 94.4-100% and 96.3-100% in the neuraminidase (NA) gene, at the nucleotide (nt) and amin

SUBMITTER: Gao X 

PROVIDER: S-EPMC8697764 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature