1. Department of Surgery, Anaesthesiology and Radiology, Faculty of Veterinary Medicine, Beni-Suef University, P. O. Box 62511, Beni-Suef, Egypt
2. Department of Surgery, Anaesthesiology and Radiology, Faculty of Veterinary Medicine, Sohag University, P. O. Box 82524, Sohag, Egypt
3. Department of Animal Medicine, Faculty of Veterinary Medicine, Beni-Suef University, P. O. Box 62511, Beni-Suef, Egypt
4. Department of Pathology, Faculty of Veterinary Medicine, Beni-Suef University, P. O. Box 62511, Beni-Suef, Egypt