Clostridium difficile, also known as C. difficile or C. diff, is a bacterium that causes diarrhea and can be fatal. People who have other illnesses or conditions requiring prolonged use of antibiotics, and the elderly, are at greater risk of acquiring this disease.
C. diff is found in feces. People can become infected if they touch items or surfaces that are contaminated with the bacteria and then touch their mouth, eyes, or nose. Health care workers can spread the bacteria to patients or contaminate surfaces through hand contact.