1. Fish Disease Department Animal Health Research Institute AHRIAgriculture Research Centre ARC Kafrelsheikh Egypt
2. Pathology Department Animal Health Research Institute AHRIAgriculture Research Centre ARC Kafrelsheikh Egypt
3. Bacteriology Department Animal Health Research Institute AHRIAgriculture Research Centre ARC Kafrelsheikh Egypt
4. Bacteriology Department Animal Health Research Institute AHRIAgriculture Research Centre ARC Alexandria Egypt