Phylogenetic Analysis of Hemagglutinin Gene and Evaluation of the Viral Shedding of H9N2 Avian Influenza Viruses Using Real-time RT-PCR in SPF Chickens.

ABSTRACT: In recent years, the H9N2 influenzavirus has been circulating widely in poultry farms causing extensive damage. The hemagglutinin (HA) genes of the two virus isolates of H9N2 subtype in specific pathogen-free chickens were studied to determine the shedding rate in the host’s oropharyngeal and cloacal routes and their genetic relationship. The sequence analysis and phylogenetic study of the samples were performed by comparing each isolate with other H9N2 isolates in the gene bank. In the present study, the chickens were inoculated with low pathogenic avian influenza virus (LPAIV) (A/Chicken/Iran/ZMT-101/1998 [H9N2]) through the intranasal route. Oropharyngeal and cloacal swabs were collected from the chickens within 1-10 days after inoculation. The rate of viral shedding was measu

SUBMITTER: Fazel P 

PROVIDER: S-EPMC8418807 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature