All patients will be asked to contact their physician if they experience diarrhea after their hospital stay. These patients will be offered a fecal C. difficile test, as per standard of care. Any patient that has 3 or more watery stools in a 24 hour period and a positive C. difficile stool test will be considered as having a C. difficile infection. Stool collection and testing will be carried out per treatment guidelines. No further typing of C. difficile isolates will be performed on samples obtained as it is beyond the scope of this study.