1. Department of Microbiology; Faculty of Veterinary Medicine; Alexandria University; Edfina Rosetta-line Egypt
2. Central Department of Public Health and Abattoirs; General Organization for Veterinary Services; Cairo Egypt
3. Department of Veterinary Microbiology and Pathology; College of Veterinary Medicine; Pullman WA USA
4. LIONEX Diagnostics and Therapeutics; Braunschweig Germany