Mar 6, 2024 · There are four laboratory tests used to diagnose Clostridioides difficile infection or CDI.

C. diff testing checks a sample of your stool (poop) for signs of an infection with a bacteria called C. diff. C. diff is also called C. difficile or Clostridioides difficile.

Rarely, to help confirm a diagnosis of C. difficile infection, a health care provider might check the inside of the colon. Tests used are either flexible sigmoidoscopy or colonoscopy.

Clostridioides difficile, or C. diff, is a highly contagious bacterium that causes diarrhea and colitis. It often infects people who’ve recently taken antibiotics.

Sep 30, 2025 · The test is done to see if diarrhea that won't go away was caused by Clostridioides difficile (C. diff) toxins.

Sep 30, 2025 · This test usually doesn't cause any pain or discomfort. There is a chance you can spread the infection if you don't wash your hands well when you collect the stool sample. There are several …

Toxins produced by Clostridioides difficile strains in the gastrointestinal tract cause pseudomembranous colitis, typically after antibiotic use. Symptoms are diarrhea, sometimes bloody, rarely progressing to …

Learn how C. difficile is tested using GDH, toxin EIA, and NAAT/PCR methods. Understand why testing can be confusing and how to interpret your results with confidence.

Nov 27, 2025 · Clostridioides difficile (C. diff or CDI) is a leading cause of healthcare-associated diarrhea and colitis. The infection commonly develops in patients who are taking or have recently …

How is a C. diff. infection diagnosed? Diagnosing a patient with C. diff. is done by obtaining a stool specimen. This stool specimen has to be liquid in nature, and should take the shape of the cup.