1. Ministry of Livestock Development and Fisheries, Veterinary Investigation Centre, Temeke, Dar es Salaam, Tanzania
2. Department of Basic Sciences and Aquatic Medicine, Norwegian School of Veterinary Science, N – 0033 Oslo, Norway
3. Tanzania Wildlife Research Institute, Arusha, Tanzania
4. Department of Production Animal Clinical Science, Norwegian School of Veterinary Science, N – 0033 Oslo, Norway
5. Department of Veterinary Medicine and Public Health, Faculty of Veterinary Medicine, Sokoine University of Agriculture, Morogoro, Tanzania