S. Abdelrahim, Jeddah I. E, E. , E1, Selma,O.A, .J. , A. Khalifa, K. , M. Elnasri1 , Ballal, .I. and A. M1 , Amgad, M, A. 2022. Incidence of infectious bursal disease in chickens submitted to the Veterinary Research Institute (VRI), Khartoum-Sudan. Journal of Veterinary Medicine and Animal Production. 5, 2 (Oct. 2022).