C. Difficile: "Clostridium difficile (C. difficile) is a bacterium that causes inflammation of the colon, known as colitis. People who have other illnesses or conditions requiring prolonged use of antibiotics, and the elderly, are at greater risk of acquiring this disease. The bacteria are found in the feces. People can become infected if they touch items or surfaces that are contaminated with feces and then touch their mouth or mucous membranes. Healthcare workers can spread the bacteria to patients or contaminate surfaces through hand contact." Gastrointestinal Disorders Source Book, 2018.