1. Veterinary Research Institute Department of Hydrobiology National Research Centre Egypt
2. Department of Pathology Faculty of Veterinary Medicine Cairo University Cairo Egypt
3. Department of Aquatic Animal Medicine and Management Faculty of Veterinary Medicine Cairo University Cairo Egypt
4. Central Laboratory of Aquaculture Research Agriculture Research Center Sharkia Egypt
5. Department of Microbiology and Immunology Faculty of Veterinary Medicine Cairo University Cairo Egypt