1. Centre for Tropical Veterinary Medicine, University of Edinburgh, Royal (Dick) School of Clinical Studies, Easter Bush, Roslin, Midlothian, UK EH25 9RG
2. Tanzania National Parks, PO Box 3134, Arusha, Tanzania
3. Dept. of Veterinary Medicine and Public Health, Sokoine University of Agriculture, PO Box 3021, Morogoro, Tanzania
4. Onderstepoort Veterinary Institute, Private Bag X5, Onderstepoort 0110, South Africa
5. Ministry of Water and Livestock Development, PO Box 322, Musoma, Tanzania
6. Animal Health Division, CSL Limited, 45 Poplar Road, Parkville 3052, Australia
7. Department of Ecology, Evolution & Behavior, University of Minnesota, 1987 Upper Buford Circle, St. Paul, Minnesota 55108