1. National Institute for Communicable Diseases of the National Health Laboratory Service, Johannesburg, South AfricaUniversity of the Witwatersrand, Johannesburg, South Africa
2. Onderstepoort Veterinary Institute, Pretoria, South AfricaUniversity of Pretoria, Pretoria, South Africa
3. Limpopo Department of Health and Social Development, Polokwane, South Africa
4. University of Limpopo, Polokwane, South Africa
5. University of Pretoria, Pretoria, South Africa
6. National Institute for Communicable Diseases of the National Health Laboratory Service, Johannesburg, South Africa
7. Limpopo Department of Agriculture, Polokwane, South Africa