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Test Code FLAC Lactoferrin, Stool (replaces Stool WBC's)

Important Note

This test measures lactoferrin, a glycoprotein component of neutrophilic granules in leukocytes. Testing for fecal lactoferrin is much more sensitive than examination for fecal leukocytes (Fecal WBC’s) as it does not require intact cells for detection.


Note: Breastfeeding may cause false positives.

Additional Codes

Epic Code


Performing Laboratory

Bronson Methodist Hospital Laboratory

Reference Values

Normal finding: negative for lactoferrin

Abnormal finding: positive for lactoferrin

Specimen Requirements

Specimen Type: Fresh stool
Container/Tube: Clean, screw-capped, plastic

Specimen Volume: 1 g

Specimen Minimum Volume: 0.5 g

Collection Instructions: 

1. Label container with patient’s name, date of birth, and
date and time of collection.

2. Cause for rejection includes preserved stool.

Additional Information: Anti-diarrhea
medication does not interfere with testing.

Specimen Transport Temperature

Refrigerate/Ambient/Frozen 2 weeks

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding