1. Department of Veterinary Anatomy, University of Nigeria, Nsukka 410001, Nigeria; 2. Department of Veterinary Surgery and Radiology, University of Nigeria, Nsukka 410001, Nigeria; 3. Department of Pathology and Microbiology, University of Nigeria, Nsukka 410001, Nigeria; 4. Department of Pharmacology, College of Health Sciences, Usmanu Danfodiyo University, Sokoto 840001, Nigeria