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Test Code GIAR Giardia Antigen, Feces

Reporting Name

Giardia Ag, F

Useful For

Sensitive screening for the detection of Giardia lamblia antigens present in stool 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)

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type


Advisory Information

Duodenal and small bowel aspirates are not acceptable for this test. If sprue is suspected, order test OAP / Parasitic Examination.

Specimen Required

Submit only 1 of the following specimens:


Preferred Specimen Type: Preserved stool

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


Preferred: Stool container with 10% buffered formalin preservative (T466)

Acceptable: SAF (sodium acetate formalin)

Specimen Volume: 5 g

Specimen Stability Information: Ambient (preferred)/Refrigerated


Acceptable Specimen Type: Unpreserved stool

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

Container/Tube: Stool container (T288)

Specimen Volume: 5 g

Specimen Stability Information: Frozen

Specimen Minimum Volume

2 g

Specimen Stability Information

Specimen Type Temperature Time
Fecal Varies

Reject Due To








Grossly bloody stool (containing no visible stool), or very mucoid stool


Reference Values


Day(s) and Time(s) Performed

Monday through Saturday, Varies

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

Test Classification

This test has been cleared or approved by the U.S. 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.

Secondary ID