1. Bacteriology, Immunology and Mycology Department, Faculty of Veterinary Medicine, Benha University, Benha, Egypt.
2. Department of Microbiology and Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt.
3. Department of Zoonoses, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt.
4. Veterinary Hospital, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt.