1. Tanzania Wildlife Research Institute, PO Box 661, Arusha, Tanzania
2. Department of Microbiology and Immunology, School of Medicine, Muhimbili University of Health and Allied Sciences, PO Box 65001, Dar es Salaam, Tanzania
3. Ngorongoro Conservation Area Authority, Private Bag, Arusha, Tanzania
4. Department of Veterinary Surgery and Theriogenology, School of Veterinary and Medical Sciences, Sokoine University of Agriculture, PO Box 3020, Chuo Kikuu, Morogoro, Tanzania
5. Department of Biochemistry, School of Medicine, Muhimbili University of Health and Allied Sciences, PO Box 65001, Dar es Salaam, Tanzania
6. Southern African Centre for Infectious Diseases Surveillance, Sokoine University of Agriculture, PO Box 3297, Chuo Kikuu Morogoro, Tanzania