1. Department of Poultry, Faculty of Agriculture, Zagazig University, Zagazig, Egypt
2. Department of Poultry Production, Faculty of Agriculture, Fayoum University, Fayoum, Egypt
3. Department of Poultry Production, Faculty of Agriculture, Kafrelsheikh University, Kafrelsheikh, Egypt
4. Department Poultry and Fish Diseases, Faculty of Veterinary Medicine, Alexandria University, El-Beheira, Egypt
5. Poultry Production Department, Faculty of Agriculture, Mansoura University, Mansoura, Egypt
6. Division of Pathology, ICAR-Indian Veterinary Research Institute, Bareilly, India
7. Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, Zagazig University, Egypt