According to the Mayo Clinic, C diff, also known as c difficile, and full name being clostridium difficile, is a bacterium that can cause a range of symptoms from diarrhea to life-threatening inflammation of the colon.

If you have a C diff infection that has not resolved despite antibiotic treatments such as vancomycin, metronidazole (Flagyl) or fidaxomicin (Dificid), then you may be a candidate for FMT at this time.