Clostridium difficile (C. diff) is a bacterium commonly found in the soil, air, and water. It is present in small amounts in the bodies of 1 to 3% of the U.S. population. Under normal circumstances, it doesn't cause any harm.

Where does C. diff live in the body?

Clostridium difficile (C. diff.) is a type of bacteria that lives in many people's intestines. C. diff. is part of the normal balance of bacteria in your body.

What is the most common cause of Clostridium difficile C. diff?

Most cases of C. diff occur when you've been taking antibiotics or not long after you've finished taking antibiotics. There are other risk factors: Being 65 or older.