1. Department of Medical Laboratory Sciences, Faculty of Health Sciences, University of Buea, Box 63, Cameroon.
2. Department of Microbiology and Parasitology, Faculty of Science, University of Buea, Box 63, Cameroon.
3. Department of Biotechnology and Food Technology, Faculty of Science, University of Johannesburg, Private Bag 2028, Johannesburg, South Africa.
4. Department of Biochemistry and Microbiology, University of Venda, Private Bag X5050 Thohoyandou, South Africa.