1. Department of Animal Hygiene and Environmental sanitation, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt
2. Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt
3. Department of Forensic and Toxicology, Faculty of Veterinary Medicine, New Valley University, New Valley, Egypt
4. Department of Animal and poultry behavior and management, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt
5. Department of Anatomy, Histology and Embryology, Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt