Jun 28, 2017




Clinical Hub,Tools & Resources,UWHC Lab Test Directory,Microbiology

Giardia/Cryptosporidium Ag

Giardia/Cryptosporidium Ag (GICR) Microbiology Lab Test

Name: Giardia/Cryptosporidium Ag

Test Name: Giardia/Cryptosporidium Ag

Health Link Test Code: GICR

LIS Test Code: GICR

CPT Code(s): 87329 and 87328

Methodology: Enzyme Immunoassay

Clinical Information:

This test simultaneously detects and differentiates Giardia cyst antigen and Cryptosporidium oocyst antigen in stool samples when giaridasis and/or cryptosporidiosis are suspected.

Days Performed: Mon-Fri, dayshift.

In-Lab Turnaround Time: 1 - 3 days.

Stat In-Lab Turnaround Time: Not available stat.

Specimen: Stool

Collection Container: Para-Pak® Ova & Parasite (O & P) kit (pink and gray caps)

Also Acceptable: ECOFIX® kit, MF (Merthiolate Formalin) kit, Para-Pak® Culture & Sensitivity (C & S) kit (orange cap), SAF (Sodium Acetate-Acetic Acid Formalin) kit, Sterile screw cap container

Collection Instructions:

See instructions included with kit.

Collection Volume: 1 mL

Pediatric Collection Volume: 1 mL

Stability Ambient:

Unpreserved: Not acceptable

Para-Pak® C&S, Para-Pak® O&P, SAF, MF: 2 months

Stability Refridgerated:

Unpreserved: 72 hours

Para-Pak® C&S: 1 week

Para-Pak® O&P, SAF, MF: 2 months

Stability Frozen:

Unpreserved: 90 days

Para-Pak® C&S: 1 week

Para-Pak® O&P, SAF, MF: Not acceptable

Sample Analyzed: Stool

Testing Volume: 0.1 mL

Pediatric Testing Volume: 0.1 mL

Specimen Transport:

Transport specimen to the laboratory.

Unacceptable Criteria:

Specimens received on patients hospitalized more than 3 days are not acceptable.


Frozen Para-Pak® O&P, SAF (Sodium Acetate-Acetic Acid Formalin), or MF (Merthiolate Formalin) specimens


Stool specimens that have been concentrated or treated with PVA fixatives are not suitable for use with this test.


LIMIT: One specimen every 7 days.



Interpretation Type: Expected Results

Additional Information:

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.


Optimal results are obtained with specimens that are less than 72 hours old.