Molecular characteristics, phylodynamics, and evolutionary changes of avian infectious bronchitis virus detected from chickens in Yunnan Province, 2021–2024
Avian infectious bronchitis virus (IBV) is endemic in poultry flocks worldwide, posing a significant threat to the global poultry industry. Frequent mixing of free-range local chickens with introduced chickens in Yunnan Province, China, facilitates the transmission, recombination, and mutation of avian IBV, thereby com...