Recombinant GI-19 infectious bronchitis virus induction of humoral immunosuppression with reduced HI antibody response following Newcastle disease virus vaccination and bursal cell apoptosis
Pathological changes and viral presence in the bursa of Fabricius (BF) have been reported, but the immunosuppression of infectious bronchitis virus (IBV) remains poorly characterized. Here, we systematically evaluated the pathogenicity of two GI-19 lineage IBV isolates, CK/CH/FJ-B3/2023 (bursal origin) and CK/CH/FJ-T5/...