Epidemiological characteristics of infectious bursal disease virus (IBDV) in China from 2023 to 2024: Mutated very virulent IBDV (mvvIBDV) is associated with atypical IBD.

ABSTRACT: Infectious bursal disease (IBD), caused by the infectious bursal disease virus (IBDV), threatens the global poultry industry with acute immunosuppression. The non-lethal novel variant IBDV (nVarIBDV) has been identified as the primary cause of a new outbreak of atypical IBD in China. However, since 2023, several poultry farms in China have continuously reported the detection of vvIBDV in chicken flocks exhibiting atypical IBD characteristics. To analyze this abnormal problem, the prevalence of IBDV in major poultry farming areas in China from 2023 to 2024 was monitored. Our epidemiological survey revealed four coexisting IBDV strains in China, nVarIBDV (69.9 %, 65/93) ranked the first, followed by vvIBDV (16.1 %, 15/93), attIBDV (8.6 %, 8/93), and cIBDV (5.4 %, 5/93). Notably, all these 15

SUBMITTER: Yu H 

PROVIDER: S-EPMC12124611 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature