1. Division of Infectious Diseases Department of Animal Medicine Faculty of Veterinary Medicine Zagazig University Zagazig Egypt
2. Department of Health Management Atlantic Veterinary CollegeUniversity of Prince Edward Island Charlottetown PE Canada
3. Department of Zoonoses Faculty of Veterinary Medicine Zagazig University Zagazig Egypt
4. Animal Health Research InstituteMansoura Provincial Lab Mansoura Egypt
5. Animal Health Research Institute Giza Egypt
6. Department of Bacteriology, Immunology and Mycology Faculty of Veterinary Medicine Benha University Benha Egypt