Oct 2, 2017




Clinical Hub,Tools & Resources,UWHC Lab Test Directory,Microbiology

C diff toxin B PCR, B6/6 Screening Only

C diff toxin B PCR, B6/6 Screening Only (CDIFFS) Microbiology Lab Test

Name: C diff toxin B PCR, B6/6 Screening Only

Test Name: C diff toxin B PCR, B6/6 Screening Only

Health Link Test Code: CDIFFS


CPT Code(s): 87493

Methodology: PCR

Clinical Information:

Detects Clostridium difficile in stool for B6/6 screening purposes only.

Days Performed: Daily.

In-Lab Turnaround Time: 4 hours.

Stat In-Lab Turnaround Time: Not available stat.

Specimen: Stool

Collection Container: Sterile container

Stability Ambient:

24 hours

Stability Refridgerated:

5 days

Stability Frozen:

Not acceptable

Sample Analyzed: Stool

Specimen Transport:

Transport specimen to the laboratory within 24 hours of collection; refrigerate if delay.

Unacceptable Criteria:

LIMIT:  One specimen upon admission.



Interpretation Type: Expected Results

Test Limitations:

Potential interfering substances are VagisilTM cream and zinc oxide paste.


Results of this assay are not affected by blood, barium sulfate, metronidazole, vancomycin present in stool specimens.

Additional Information:

C. difficile positive patients should be placed in enhanced contact precautions for the duration of hospitalization.


In the absence of relevant clinical signs or symptoms, a positive result likely reflects colonization, rather than infection, and does not require treatment.