K. S. Intisar1, Y. H. Ali1, A. I. Khalafalla2, K. M. Taha3 and Mahasin E. A. Rahman1
1Central Veterinary Research Laboratory, P. O. Box 8067, Al Amarat, Khartoum, Sudan.
2Department of Microbiology, Faculty of Veterinary Medicine, University of Khartoum, Shambat, 13314 Khartoum North, Sudan.
3Atbara Veterinary Research Laboratory.
