1. Hygiene and Zoonoses Department; Faculty of Veterinary Medicine; Mansoura University; Mansoura 35516 Egypt
2. Bacteriology, Mycology and Immunology Department; Faculty of Veterinary Medicine; Mansoura University; Mansoura 35516 Egypt
3. Zoonoses Department; Faculty of Veterinary Medicine; Zagazig University; Zagazig 44511 Egypt
4. Food Hygiene and Control Department; Faculty of Veterinary Medicine; Mansoura University; Mansoura 35516 Egypt