1. Department of Fish Biology and Ecology, Central Laboratory for Aquaculture Research, Agriculture Research Center, Abbassa, Abo-Hammad, Egypt
2. Department of Poultry and Fish Diseases, Faculty of Veterinary Medicine, Alexandria University, Edfina, Egypt
3. Department of Fish and Animal Production, Faculty of Agriculture (Saba Basha), Alexandria University, Alexandria, Egypt
4. Fish and Shrimp Consultant, Alexandria, Egypt
5. Department of Microbiology, Faculty of Veterinary Medicine, Matrouh University, Matrouh, Egypt