1. Institute of Life and Earth Sciences, Pan African University, (PAULESI), Ibadan, Nigeria; Department of Veterinary Microbiology, University of Ibadan, Ibadan, Nigeria; Department of Veterinary Microbiology, University of Maiduguri, Maiduguri, Nigeria.
2. Institute of Life and Earth Sciences, Pan African University, (PAULESI), Ibadan, Nigeria; Veterinary Teaching Hospital, Ahmadu Bello University, Zaria, Nigeria.
3. Laboratoire Central de L'Elevage, B.P: 485, Niamey, Niger Republic.
4. Institute of Life and Earth Sciences, Pan African University, (PAULESI), Ibadan, Nigeria; Department of Veterinary Microbiology, University of Ibadan, Ibadan, Nigeria.