1Department of Fish Diseases and Management, Faculty of Veterinary Medicine, Cairo University, 12211 Giza, Egypt, E-mail: aeissa2005@gmail.com
2Department of Poultry and Fish Diseases, Faculty of Veterinary Medicine, University of Tripoli, Tripoli, Libya, E-mail: aeissa2005@gmail.com
3Department of Pathobiology and Diagnostic Investigation, Aquatic Animal Health Laboratory (AAHL), College of Veterinary Medicine, Michigan State University, East Lansing, 48824 MI, USA, E-mail: aeissa2005@gmail.com