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UW Health SMPH
American Family Children's Hospital

UW Hospital and Clinics Lab Test Directory

Test Name: Giardia Ag

Test Code(s): GAT / GIAC

CPT Code(s): 87329

Methodology: Enzyme Immunoassay

Clinical Significance: Detection of Giardia Specific Antigen (GSA) 65.

The Giardia Antigen test should be ordered routinely on patients with diarrhea in whom giardiasis is suspected.

Days Performed: Mon, Wed, and Fri.

Turnaround Time: Stat: Not available stat.
Routine: Up to 3 days.

Specimen Requirements

Specimen: Stool

Collection Instructions: See collection instructions included with kit.

Collection Container: Preferred: Para-PakŪ Ova & Parasite (O & P) kit (pink and gray caps)
Also Acceptable: ECOFIXŪ kit, MF (Merthiolate Formalin) kit, Para-PakŪ Culture & Sensitivity (C & S) kit (orange cap), SAF (Sodium Acetate-Acetic Acid Formalin) kit, Sterile screw cap container

Collection Volume: Preferred: 1 mL
Pediatrics: 1 mL

Sample Analyzed: Stool

Volume Required: Preferred: 50 microliters
Pediatrics: 50 microliters

Specimen Transport: Transport specimen to UWHC Microbiology (B4/231).

Unacceptable Criteria: Specimens received on patients hospitalized more than 3 days are not acceptable. LIMIT: One specimen every 7 days.

Stability: Ambient: Unpreserved, Para-PakŪC&S: Not acceptable; Para-PakŪ O&P, SAF, MF: 2 months
Refrigerated: Unpreserved: 48 hours; Para-PakŪ C&S: 1 week; Para-PakŪ O&P, SAF, MF: 2 months
Frozen: Unpreserved: Unlimited; Para-PakŪ C&S: 1 week; Para-PakŪ O&P, SAF, MF: Not acceptable


Expected Results:


Additional Information:

A single specimen is adequate for diagnosis.


Test of cure specimens should not be submitted.


Because these agents do not cause hospital acquired infection, specimens on patients who have been hospitalized greater than 3 days will require approval of the Director of Microbiology or Pathology Resident.


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