1. University of Nairobi, Faculty of Veterinary Medicine, Department of Veterinary Pathology Microbiology and Parasitology, P. O. Box 29053-00625, Kangemi, Nairobi, Kenya
2. Animal Health and Industry Training Institute (AHITI) Kabete, P. O. Box 29040-00625, Kangemi, Nairobi, Kenya
3. Department of Animal Science, Chuka University, P.O Box 109-00625, Chuka, Kenya
4. University of Nairobi, Faculty of Veterinary Medicine, Department of Public Health Pharmacology and Toxicology, P.O. Box 29053-00625, Kangemi, Nairobi, Kenya