Clostridium difficile, also called C. difficile or C. diff, is a bacterium that causes inflammation of the colon.

This health condition commonly affects older adults in hospitals, and it often occurs after the use of antibiotic medications.

According to the Centers for Disease Control and Prevention, C. difficile led to almost half a million infections among patients in the United States in a single year.

More than 80 percent of these deaths occurred among people aged 65 years or older.

The medical community considers C. difficile to be a major cause of infectious disease death in the U.S. and the most common microbial cause of healthcare-associated infections in hospitals.

The excess healthcare costs of this condition can reach almost $5 billion each year for acute care facilities alone.

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