Dr. Snoussi Mejdi is a professor of microbiology in the Department of Biology (University of Hail, Saudi Arabia). He graduated from the Faculty of Sciences of Sfax, University of Sfax, Tunisia, with a Bachelor's degree in Natural Sciences in June 2001. He obtained his Master's degree in Biology and Health in October 2005 and his Ph.D. in Biological Sciences and Biotechnology in December 2009 from the University of Monastir, Tunisia. Prof. Snoussi is working on the identification/biological activities of plant-derived molecules and their interaction with the quorum-sensing system in bacteria in collaboration with research teams in Tunisia, Italy, Spain, India, and Saudi Arabia.