1. Department of Microbiology, Faculty of Veterinary Medicine, University of Khartoum, Khartoum North, Sudan.
2. Abu Dhabi Food Control Authority, Abu Dhabi, United Arab Emirates.
3. KU Leuven, Department of Microbiology and Immunology, Laboratory of Clinical & Epidemiological Virology, Leuven, Belgium.
4. Department of Pathology, Faculty of Veterinary Medicine, University of Khartoum, Khartoum North, Sudan.