Printable Test Catalog - OU Medicine

MINIMUM VOLUME: 1 mL
TEST AVAILABILITY: Daily
TURNAROUND TIME: 3-6 weeks
METHODOLOGY: DNA sequencincg
CPT: 83890; 83894 x 2; 83898 x 4; 83904 x 8; 83912 (4 MARKERS)
[CDIFF] Clostridium Difficile Toxins
SPECIMEN REQUIRED: Loose stool in a leakproof specimen cup
without transport media or preservatives. If unable to submit
immediately to the OUMC Lab, refrigerate (4 degrees C) for
no more than 72 hours. Rectal swabs and formed stool
specimens will be rejected.
TUBE OR CONTAINER: Screw cap container.
SPECIAL HANDLING: Test will not be performed on formed stool or
swabs, on patients less than 1 year of age, or on patients
with a previous positive Toxin B assay in the last 30 days.
TEST AVAILABILITY: Daily
METHODOLOGY: PCR (Polymerase Chain Reaction)
CLINICAL INFORMATION: Aid in diagnosis of antibiotic related
colitis. The C. difficile PCR has a reported negative
predictive value of greater than 98%. Therefore, the test
will only be performed once every 7 days when C. difficileassociated
colitis is strongly suspected. Otherwise, alternate
causes of diarrhea should be sought.
[CDIFFAG] Clostridium Difficile Antigen
SPECIMEN REQUIRED: Loose stool in a leakproof specimen cup
without transport media or preservatives. If unable to submit
immediately to the OUMC Lab, refrigerate (4 degrees C) for
no more than 72 hours or freeze (-10 C or lower). Rectal swabs
and formed stool specimens will be rejected.
TUBE OR CONTAINER: Screw cap container.
SPECIAL HANDLING: Test will not be performed on formed stool or
swabs, on patients less than 1 year of age, or on patients
with a previous positive Toxin B assay in the last 30 days.
TEST AVAILABILITY: Daily
METHODOLOGY: Enzyme immunoassay (EIA)
CLINICAL INFORMATION: Aid in diagnosis of antibiotic related
colitis. The C. difficile Ag-EIA has a reported negative
predictive value of greater than 99%.1 Therefore, the test
should only be repeated when C. difficile-associated colitis
is strongly suspected. Otherwise, alternate causes of diarrhea
should be sought.
Stools positive for Clostridium difficile antigen will be
tested for Toxin B to confirm the presence of a toxin-producing
strain of C. difficile at an additional charge.
[CDIFTC] Clostridium Difficile Toxin B
SPECIMEN REQUIRED: Place a freshly collected liquid or loose