1. Virology and Immunology Unit, Department of Veterinary Microbiology, Faculty of Veterinary Medicine, Ahmadu Bello University, Zaria, Nigeria
2. Avian and Fish Health Unit, Veterinary Teaching Hospital, Ahmadu Bello University, Zaria, Nigeria
3. Diagnostic Laboratory, Department of Veterinary Microbiology, Faculty of Veterinary Medicine, Ahmadu Bello University, Zaria, Nigeria
4. Central Diagnostic Unit, National Veterinary Research Institute (NVRI), Vom, Nigeria
5. Department of Veterinary Pathology, Faculty of Veterinary Medicine, Ahmadu Bello University, Zaria, Nigeria