Spray vaccination with a safe and bivalent H9N2 recombinant chimeric NDV vector vaccine elicits complete protection against NDV and H9N2 AIV challenge.

ABSTRACT: Newcastle disease virus (NDV) and H9N2 avian influenza virus (AIV) represent significant pathogenic risks to the poultry industry, leading to considerable economic losses. Vaccination is a widely used preventive measure against these pathogens, yet the lack of a live bivalent vaccine targeting NDV and H9N2 AIV imposes a heavy vaccination burden. Previously, we constructed a genotype-matched chimeric NDV vector, LX-OAI4S, in which the genotype I NDV backbone was replaced with the ectodomain of haemagglutinin-neuraminidase (HN) and modified using the attenuated F gene from the genotype VII vaccine strain A-VII. Based on the LX-OAI4S vector, we successfully generated three H9N2 recombinant viruses: LX-OAI4S-NPU-HA, LX-OAI4S-MU-HA, and LX-OAI4S-HNU-HA. These recombinants incorporated the H9N2

SUBMITTER: Wang X 

PROVIDER: S-EPMC11786375 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature