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Fecal White Blood Cell Exam

Item Value
Approval req'd? Yes, for samples from inpatients collected > 72 hours after admission, contact Microbiology at 415-353-1268.
Available Stat? No
Test code P221
Performed by Microbiology
In House Availability Daily, day and evening shift
Method Gram stain
Collection Instructions Select a sample of diarrheal stool with an applicator stick, including bloody or mucous discharge if present.

Deliver to lab immediately.

Do not collect samples between 2200 and 0630 hours
Container type Clean container
Amount to Collect See preferred volume
Sample type Fresh diarrheal stool
Preferred volume 10 gm
UCSF Rejection Criteria Samples received >3 hours of collection. Stool in preservative.
Processing notes Maintain sample at room temperature
Normal range Negative (No cells)
Synonyms Fecal leukocytes; stool analysis
Stability 3 hours
Turn around times 4 hours
Additional information The presence or absence of fecal leukocytes is of poor sensitivity and specificity in diagnosing hospital-acquired diarrhea, and is no longer offered on hospitalized patients > 72 hours post admission.

See also Stool Analysis
CPT coding 87205
LOINC code 2755-7
Last Updated 6/19/2013 2:50:18 PM
Entry Number 1009
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