1. Department of Aquatic Animal Medicine and Management Faculty of Veterinary Medicine Cairo University Giza Egypt
2. Department of Nutrition and Clinical Nutrition Faculty of Veterinary Medicine Suez Canal University Ismailia Egypt
3. Fish Farming and Technology Institute Suez Canal University Ismailia Egypt
4. Pathology Department Faculty of Veterinary Medicine Suez Canal University Ismailia Egypt
5. Agriculture Research Centre Animal Health Research InstituteFish Diseases Research Department Doki Egypt
6. Department of Animal and Rangeland Sciences Oregon State University Corvallis OR USA
7. Department of Nutrition and Clinical Nutrition Faculty of Veterinary Medicine Cairo University Giza Egypt