1. Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, 930 Campus Road, Ithaca, New York 14853, USA
2. Namibian Ministry of Environment, Forestry and Tourism, Private Bag 13306, Windhoek, Namibia
3. Private Consultant, PO Box 260, Kakamas 8870, South Africa
4. Du Preez Wild, PO Box 510, Otjiwarongo 12001, Namibia
5. Centre of Excellence for Biomedical Tuberculosis Research, South African Medical Research Council Centre for Tuberculosis Research Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, Cap