Affiliation: | 1.Department of Clinical Studies, College of Veterinary Medicine and Agriculture, Addis Ababa University, P.O.Box 34, Bishoftu, Ethiopia ;2.Department of Microbiology, Immunology and Veterinary Public Health, College of Veterinary Medicine and Agriculture, Addis Ababa University, P.O.Box 34, Bishoftu, Ethiopia ;3.Aklilu Lemma Institute of Patho-Biology, Addis Ababa University, P.O.Box 1176, Addis Ababa, Ethiopia ; |