1. Department of Microbiology, Obafemi Awolowo University, Ile-Ife, Osun State Nigeria
2. Biocatalysis and Technical Biology Research Group, Cape Peninsula University of Technology, PO Box X17 Bellville, 7535, South Africa
3. Department of Microbiology, North-West University, Mmabatho, Mahikeng, South Africa
4. Agricultural Research council, Animal Production Institute, Irene, South Africa