1. Faculty of Veterinary Science, University of Zimbabwe, P.O. Box MP167 Mount Pleasant, Harare, Zimbabwe
2. International Wildlife Veterinary Services, 1850 North Main Street, Salinas, California, USA
3. Department of Veterinary Pathology, University of Utrecht, P.O. Box 80185,3508 TD Utrecht, The Netherlands
4. Department of Pathology, School of Veterinary Science, University of Bristol, Langford, Bristol, BS18 7DU England
5. Department of National Parks and Wildlife Management, P.O. Box 8365, Causeway, Harare, Zimbabwe