1. Department of Virology
2. Faculty of Veterinary Medicine
3. Mansoura University
4. Mansoura 35516
5. Egypt
6. Department of Mechanical Engineering and Applied Mechanics
7. University of Pennsylvania
8. Philadelphia
9. USA
10. Food Animal Health Research Program
11. Ohio Agricultural Research and Development Center
12. College of Food, Agriculture and Environmental Sciences
13. Department of Veterinary Preventive Medicine
14. College of Veterinary Medicine