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Clostridium Difficile (C. Diff) Stool Test

Clostridium difficile (commonly called C. difficile or C. diff) is a type of bacteria whose overgrowth from antibiotic use is associated with diarrhea and other gastrointestinal problems. The C. diff toxin test identifies the presence of this bacteria and the gene associated with toxin production. C. diff is present as normal flora in the digestive tract, but when broad-spectrum antibiotics are used to treat infections, typically for an extended period of time, the balance of the normal flora is disrupted and the overgrowth of clostridium difficile is allowed to occur.

The growth of C. difficile can lead to damage of the gastrointestinal lining.  The resulting symptoms can range from mild diarrhea to a more severe toxic megacolon. C. difficile is the primary cause for psuedomembraneous colitis.

Test Details

The test result will screen for the presence of C. difficile toxin.

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Am I required to fast?

No, fasting is not required. There are no dietary or medicinal restrictions to take this test.

What is the sample required?

A stool sample in a clean container provided by the laboratory is required for this test.

Is a doctor's order required?

No. You do not need to provide a doctor’s order to get lab testing done at Any Lab Test Now.


Test results generally take between 5 to 8 business days after your specimen is collected.

Do I need to make an appointment?

No. You can walk in for same day testing. We make it easy for you by offering work-friendly hours.

If I have questions about my tests results who should I contact?

We recommend you share your results with your physician.