Former Patient Thanks Loyola Physicians (IMAGE) Loyola Medicine Caption Joan Corboy of Wilmette, Ill., thanks Dr. Stuart Johnson, left, and Dr. Dale Gerding for providing the medical care to overcome a Clostridium difficile (C-diff) infection that caused her to lose 55 pounds in less than six months. Gerding and Johnson co-authored a study that answers how C-diff causes disease in humans. Credit Photo by Al Hayashi/Loyola University Health System Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.