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Test Code LAB259 Giardia Antigen

Performing Lab

Arnot Ogden Medical Center

Ordering Recommendations

Sensitive screening for the detection of Giardia antigen present in stool.

Collect

Stool

Collection Device

Preferred Specimen: Preserved stool in C&S medium  (orange top container)

Other acceptable containers:
Plain Sterile Container (must be tested within 30 minutes of collection)
Cary-Blair medium
Stuarts medium

Stability (from collection to initiation)

Specimen Type Container Storage Temperature Length of Stability
Unpreserved stool plain sterile 2-8C 30 minutes
Preserved stool C&S/Cary-Blair refrigerated
frozen (-20C)		 2 weeks
2 months

Storage/Transport Temperature

Collection Container Acceptable Storage/Transport Conditions
C&S/Cary-Blair refrigerated (2-8C)
frozen )-20 - -70C)

Methodology

Solid-phase immunochromatographic lateral flow assay

Start Date

9/13/2017

Last Review Date

8/7/2025

Performed

Monday - Friday

Reference Interval

Negative

Unacceptable Conditions

  • Unpreserved specimens that are >30 minutes old
  • Preserved specimens that exceed stability limits
  • Specimens that do not meet laboratory labeling requirements
  • Specimens collected with expired devices
  • Specimens collected in PVA transport
  • Specimens collected during an endoscopic procedure are not accepted.

Lab Section

Microbiology

Collection Instructions

Patient should pass stool into a clean dry pan or special container (such as a hat) mounted on the toilet  for this purpose.  Care should be taken to not contaminate with urine. 

Transfer representative portion of sample to the C&S container to the red fill line on the side of the vial. Do not overfill.

Remarks

  • Endoscopic and gastric aspirates are not approved specimen types for this test.
  • This test will only detect Giardia antigen in fecal specimens. This test will not detect any other parasitic agent of infection.
  • If a single specimen is submitted for examination and results are negative, be advised that one negative specimen does not rule out the possibility of infection.
  • When clinically indicated, results should be confirmed by a second method.

Reported

Monday - Friday

Notes

  • Endoscopic and gastric aspirates are not approved specimen types for this Giardia Antigen test.
  • This test will only detect Giardia antigen in fecal specimens. This test will not detect any other parasitic agent of infection.
  • If a single specimen is submitted for examination and results are negative, be advised that one negative specimen does not rule out the possibility of infection.
  • When clinically indicated, results should be confirmed by a second method.