1. Department of Animal Medicine, College of Veterinary Medicine, Benha University, Benha 13511, Egypt
2. Nebraska Center for Virology, University of Nebraska Lincoln, Lincoln, NE 68583, USA
3. Botany and Microbiology Department, Faculty of Science, Benha University, Benha 13518, Egypt
4. Department of Biological Sciences, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
5. Department of Microbiology, Immunology and Veterinary Public Health, College of Veterinary Medicine and Agriculture, Addis Ababa University, Bishoftu P.O. Box 34, Ethiopia