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Clostridium difficile Toxin B Stool Test, Qualitative, Real-Time PCR

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The clostridium difficile toxin B stool test is useful in diagnosing clostridium difficile toxin B.


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Test Code:


CPT Code(s):


Also Known As:

C. difficile Toxin B Gene


Real-Time Polymerase Chain Reaction (RT-PCR)




You must take your lab order to the lab to obtain a proper specimen container before collection. No special preparation required. This test is for use only with liquid or soft stools; performance characteristics of other clinical specimen types have not been established.

Test Results:

5-7 days. May take longer based on weather, holiday or lab delays.

Walk-In Lab is prohibited from selling Quest tests to residents in the following states:AZ, NY, NJ, RI

C-difficile is the major cause of antibiotic-associated diarrhea (AAD) and pseudomembranous colitis. This type of bacteria is established in the digestive tract and can induce severe diarrhea, nausea, fever, and stomach pain. Individuals who are at increased risk are those who require prolonged use of antibiotics and older persons. Toxin B causes the cells to be more enterable and can lead to hemorrhaging.  

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