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Full-genome characterization and genetic analysis of a H9N2 virus in commercial broilers in Iran, 2017

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  • Full-genome characterization and genetic analysis of a H9N2 virus in commercial broilers in Iran, 2017

    Trop Anim Health Prod. 2019 Feb 7. doi: 10.1007/s11250-019-01809-1. [Epub ahead of print]
    Full-genome characterization and genetic analysis of a H9N2 virus in commercial broilers in Iran, 2017.

    Fallah Mehrabadi MH1, Ghalyanchilangeroudi A2, Ghafouri SA3, Malekan M4, Ziafati Z4, Hosseini H5, Mousavi FS4, Jabbarifakhr M4, Aghaeean L4.
    Author information

    Abstract

    Since 1998, Iran's poultry industry has faced several outbreaks of low pathogenic avian influenza H9N2. Tissue samples were collected from a broiler flock with respiratory symptoms in autumn 2017. After that, virus isolation and confirmation of H9N2 using RT-PCR, sequencing, and bioinformatic analysis for all eight genes were performed. The phylogenic analysis revealed HA gene of recent Iranian isolate (A/chicken/Mashhad/UT-Barin/2017) which was clustered in G1 sublineage. In addition, all eight genes of the virus were placed with Pakistani isolates of 2015 in separate group. Based on amino acid motif KSSR in HA cleavage site, the UT-Barin is considered as low pathogenic avian influenza with eight HA and seven NA potential N-glycosylated sites. No evidence was detected regarding adamantane and neuraminidase inhibitors' drug's resistance. Multiple point mutations were observed in all genes that were responsible for increasing virulence of the virus for avian host and also increasing affinity to mammalian host cells.


    KEYWORDS:

    Avian influenza; Bioinformatic analysis; H9N2; Iran; Mammalian cells; Virulence

    PMID: 30729386 DOI: 10.1007/s11250-019-01809-1
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