Nchucheko Makhubele | South African Field Epidemiology Training Program, National Institute for Communicable Diseases, a division of the National Health Laboratory Services Johannesburg, South Africa | NchuchekoM@nicd.ac.za 
Tebogo Matjokotja | Gauteng Department of Health, Public Health Directorate, Johannesburg, South Africa | Tebogo.Matjokotja@gauteng.gov.za
Phuti Sekwadi | Centre for Enteric Diseases (CED) of the National Institute for Communicable Diseases a division of the National Health Laboratory Services, Johannesburg, South Africa | PhutiS@nicd.ac.za
Hellen Kgatla | South African Field Epidemiology Training Program, National Institute for Communicable Diseases, a division of the National Health Laboratory Services Johannesburg, South Africa | HellenK@nicd.ac.za
Linda Erasmus | Centre for Enteric Diseases (CED) of the National Institute for Communicable Diseases a division of the National Health Laboratory Services, Johannesburg, South Africa | LindaE@nicd.ac.za
Juno Thomas |Centre for Enteric Diseases (CED) of the National Institute for Communicable Diseases a division of the National Health Laboratory Services, Johannesburg, South Africa | JunoT@nicd.ac.za