ABOUT TOPAZ

John M. Clark, PhD

Dr. John M. Clark is currently Professor of Environmental Toxicology and Chemistry at the University of Massachusetts-Amherst and the Director of the Massachusetts Pesticide Analysis Laboratory. Dr. Clark has conducted extensive research on the detection and monitoring of head lice infestations and the mechanisms leading to treatment resistance. He has published several abstracts and numerous articles featured in Toxicology, The Journal of Agriculture and Food Chemistry, Journal of Medical Entomology, Pesticide Biochemistry and Physiology and Pest Management Science. Dr. Clark received his PhD from Michigan State University and conducted his post-doctoral training at the Marine Biology Laboratory in Woods Hole, MA.