1Central Biotechnology Laboratory, College of Veterinary Medicine, King Faisal University, P.O. Box: 400 Al-Ahsa, 31982, Saudi Arabia; 2Department of Virology, Faculty of Veterinary Medicine, Cairo University, 12211, Giza, Egypt.
3Department Clinical Sciences, College of Veterinary Medicine, King Faisal University, P.O. Box: 400 Al-Ahsa, 31982, Saudi Arabia.; 4Department of Medicine and Infectious Diseases, Faculty of Veterinary Medicine, Cairo University, 12211, Giza, Egypt.; 5Veterinary Teaching Hospital, College of Veterinary Medicine, King Faisal University, P.O. Box: 400 Al-Ahsa, 31982, Saudi Arabia.