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Test Code GIARDM Giardia Antigen, Feces

Additional Codes



Ordering Guidance

Duodenal, colonic wash, or small bowel aspirates are not acceptable for this test. If giardiasis is suspected, order test ID, OAP / Parasitic Examination, Feces.

Specimen Required

Submit only 1 of the following specimens:



Specimen Type: Preserved feces

Supplies: Formalin 10% Buffered Neutral (T466); Stool Collection Kit, Random (T635)


Preferred: Fecal container with 10% buffered formalin preservative

Acceptable: SAF (sodium acetate formalin)

Specimen Volume: 5 g

Specimen Stability Information: Ambient (preferred) 60 days



Specimen Type: Unpreserved feces

Supplies: Stool container, Small (Random), 4 oz (T288); Stool Collection Kit, Random (T635)

Container/Tube: Fecal container

Specimen Volume: 5 g

Specimen Stability Information: Frozen 60 days

Secondary ID


Useful For

Sensitive screening for the detection of Giardia antigens present in fecal specimens

Testing Algorithm

The following algorithms are available in Special Instructions:

-Parasitic Investigation of Stool Specimens Algorithm

-Laboratory Testing for Infectious Causes of Diarrhea

Method Name

Enzyme-Linked Immunosorbent Assay (ELISA)

Reporting Name

Giardia Ag, F

Specimen Type


Specimen Minimum Volume

2 g

Specimen Stability Information

Specimen Type Temperature Time Special Container
Fecal Varies

Reject Due To

Other Grossly bloody feces (containing no visible specimen), or very mucoid feces, specimens preserved in ECOFIX (green cap), C and S (orange cap), or methiolate formalin (MF)

Reference Values


Day(s) Performed

Monday through Saturday

Report Available

Same day/1 to 4 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
GIAR Giardia Ag, F 6412-1


Result ID Test Result Name Result LOINC Value
24085 Giardia Ag, F 6412-1