1Department of Chemistry, Faculty of Science and Technology, Sefako Makgatho Health Sciences University, Molotlegi Street, Ga-Rankuwa 0204, Pretoria, South Africa
2Department of Biology, Faculty of Science and Technology, Sefako Makgatho Health Sciences University, Molotlegi Street, Ga-Rankuwa 0204, Pretoria, South Africa
3Department of Clinical Microbiology, National Health Laboratories Services, Sefako Makgatho Health Sciences University, Molotlegi Street, Ga-Rankuwa 0204, Pretoria, South Africa