1. Laboratory of Microbiology, Department of Microbiology, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon
2. Laboratory of Phytobiochemistry and Medicinal Plants Study, Department of Biochemistry, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon
3. Laboratory of Pharmacology and Toxicology, Department of Biochemistry, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon
4. Laboratory of Bacteriology, Centre Pasteur of Cameroon, Yaoundé, Cameroon