1. Laboratory of Microbiology, Department of Microbiology, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon
2. Laboratory of Microbiology, Départment of Microbiology, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon
3. Laboratory of Pharmacology and Toxicology, Départment of Biochemistry, Faculty of Science, University of Yaoundé I, Yaoundé, Cameroon