1. Department of Internal Medicine, Infectious and Fish Diseases, Faculty of Veterinary Medicine Mansoura University Mansoura Egypt
2. Department of Husbandry and Development of Animal Wealth, Faculty of Veterinary Medicine Mansoura University Mansoura Egypt
3. Manzala Fish Hatchery Manager Manzala City, Dakahlia Region Lakes and Fish Resources Protection and Development Agency Cairo Egypt
4. Department of Poultry and Fish Diseases, Faculty of Veterinary Medicine Alexandria University Alexandria Egypt