1. Division of Medical Microbiology, Department of Laboratory Medicine and Pathology, Faculty of Health Sciences, Walter Sisulu University, Private Bag: X1, Mthatha 5117, Eastern Cape, South Africa
2. National Health Laboratory Services (NHLS), Nelson Mandela Academic Hospital, Mthatha 5100, South Africa
3. Department of Biological and Environmental Sciences, Walter Sisulu University, Private Bag, X1, Mthatha 5117, Eastern Cape, South Africa