Mohamed, M.A., Bakhit, B.M., Ibrahim, A.A. and Saleh, M. 2016. Evaluation of The Living Escherichia coli-O78 Deleted aroA Vaccine Against Homologous and Heterologous E. coli Challenge in Broiler Chickens. Journal of Advanced Veterinary Research. 6, 3 (Jul. 2016), 89-92.