1. Department of Biochemistry and Microbiology, Applied and Environmental Microbiology Research Group (AEMREG), University of Fort Hare, Alice, South Africa;
2. SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, South Africa;
3. Food Technology Department, Nutrition and Toxicology Division, Federal Institute of Industrial Research Oshodi, Lagos, Nigeria;
4. Discipline of Microbiology, School of Life Sciences, College of Agriculture, Engineering and Science, University of Kwazulu-Natal, Durban, South Africa