1. Department of Medical Microbiology, University of Kwazulu-Natal, 800 Bellair Road, Mayville, Durban, South Africa
2. National Health Laboratory Service, 1 Modderfontein Road, Sandringham, Johannesburg, South Africa
3. Respiratory and Meningeal Pathogens Reference Unit, National Institute for Communicable Diseases, a division of the National Health Laboratory Service, 1 Modderfontein Road, Sandringham, Johannesburg, South Africa