| first report of an infectious bursal disease outbreak in a vaccinated chicken flock in anambra state, nigeria. | infectious bursal disease was reported in a flock of 7-week old vaccinated chickens. clinical findings and post-mortem changes were classical as well as the microscopic pathology of the bursa. bursal homogenates from dead birds were positive for ibd virus antigen in agar gel diffusion test (agdt). convalescent sera obtained from birds 14 days following the onset of clinical signs were also positive for ibd virus antibody in agdt. seven-week old susceptible birds, each infected i/m with 0.1 ml of ... | 1991 | 1668870 |