1. National Zoological Gardens of South Africa, PO Box 754, Pretoria 0001, South Africa
2. Bacteriology Section, ARC-Onderstepoort Veterinary Institute, Private Bag X05, Onderstepoort 0110, South Africa
3. DST/NRF Centre of Excellence for Biomedical TB Research, US/MRC Centre for Molecular and Cellular Biology, Division of Molecular Biology and Human Genetics, Department of Biomedical Sciences, Faculty of Health Sciences, Stellenbosch University, PO Box 19063, Tygerberg 7505, South Africa
4. Genetics Department, University of the Free State, PO Box 339, Bloemfontein 9300, South Africa