1. 1 Bowling Green State University College of Arts and Sciences, Department of Biological Sciences , Bowling Green, OH , USA
2. 3 Southern Illinois University, Department of Environmental Sciences , Edwardsville, IL , USA
3. 2 University of Ibadan, Department of Microbiology , Ibadan , Nigeria
4. 4 University of Louisville, Department of Chemistry , Louisville, KY , USA
5. 5 Chantal Biya International Reference Centre, Laboratory of Vaccinology , Yaounde , Cameroon