1. Department of Veterinary Laboratory Diagnosis, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM Serdang, Selangor 43400, Malaysia.
2. Department of Animal Production, Federal University of Technology Minna, PMB 65, Minna, Niger, Nigeria.
3. Laboratory of Vaccines and Biomolecules, Institute of Bioscience, Universiti Putra Malaysia, UPM Serdang, Selangor 43400, Malaysia.
4. Department of Farm and Exotic Animal Medicine and Surgery, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM Serdang, Selangor 43400, Malaysia.
5. Department of Veterinary Pathology and Microbiology, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM Serdang, Selangor 43400, Malaysia.
6. Department of Veterinary Microbiology, Faculty of Veterinary Medicine, Bayero University, PMB 3011, Kano, Nigeria.
7. Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.