1. Department of Science and Technology/National Research Foundation Centre of Excellence for Biomedical Tuberculosis Research/Medical Research Council Centre for Molecular and Cellular Biology/Division of Molecular Biology and Human Genetics, Faculty of Health Sciences, Stellenbosch University, PO Box 19063, Tygerberg, 7505, South Africa
2. Epidemiology Unit, Veterinary Directorate, KwaZulu-Natal Department of Agriculture, Environmental Affairs and Rural Affairs, Private Bag X2, Cascades, 3202, South Africa
3. Bacteriology Section, Onderstepoort Veterinary Institute, Private Bag X05, Onderstepoort, 0110, South Africa
4. Current address: Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Private Bag X04, Onderstepoort, 0110, South Africa
5. Directorate of Veterinary Services, PO Box 12, Skukuza, Kruger National Park, 1390, South Africa