1. Department of Bacteriology, Mycology and Immunology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
2. Department of Pharmacology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
3. Department of Hygiene and Zoonoses, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
4. Pharmacology Department, Faculty of Veterinary Medicine, Suez Canal University, Ismailia, Egypt
5. Department of Food Hygiene and Control, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt