Stuart Johnson, MD, DTM&H, is professor of medicine at Loyola University Stritch School of Medicine at Loyola University Medical Center in Maywood, Illinois and the Deputy ACOS for Research at the Hines VA Hospital. Dr. Johnson received his MD from the University of Minnesota Medical School and completed his internal medicine residency and infectious disease fellowship training at the University of Minnesota Hospital and the Minneapolis VA Medical Center. He received a diploma in Tropical Medicine and Hygiene at Mahidol University in Bangkok, Thailand and a Career Development Award from the Department of Veterans Affairs. He is the past president of the Anaerobe Society of the Americas.

Dr. Johnson's main research interest and focus has involved the epidemiology and pathogenesis of Clostridium difficile infections. He is actively studying variant strains of C. difficile and the role of the various toxins in the pathogenesis of C. difficile disease. He also has been involved in clinical research on the parasite Angiostrongylus cantonensis, responsible for most cases of eosinophilic meningitis, world-wide.