1. Department of Animal Health Federal College of Animal Health and Production Technology National Veterinary Research Institute Vom Nigeria
2. Department of Veterinary Medicine Faculty of Veterinary Medicine University of Nigeria Nsukka Nigeria
3. Istituto Zooprofilattico Sperimentale della Sicilia ‘A.Mirri’ Palermo Italy
4. Viral Research Division National Veterinary Research Institute Vom Nigeria
5. Department of Veterinary Medicine College of Veterinary Medicine Federal University of Agriculture Makurdi Nigeria
6. Department of Veterinary Medicine University of Bari Bari Italy