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Cryptosporidium/Giardia Antigen
Test CodeCRYGI
Alias/See Also
LAB258
Preferred Specimen
Cary-Blair transport medium
Minimum Volume
1.0 mL
Other Acceptable Specimens
- C&S transport medium
- Sterile container
Instructions
- Patient should pass stool into a clean, dry container mounted on the toilet for this purpose.
- Place enough stool in the transport vial to reach the fill line indicated on the vial.
Specimen Stability
Preserved Stool
Refrigerated: 2 weeks
Unpreserved Stool
Refrigerated: 24 hours
Frozen: Unacceptable
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Rejection will occur for the following reasons: improperly labeled specimen, insufficient volume, specimen not submitted in appropriate transport container, leaking specimens, stool samples contaminated by products with an oily or particulate base (Barium, mineral oil) are not acceptable.
Methodology
Qualitative immunochromatographic assay that detects Cryptosporidium and Giardia antigens in stool.
Setup Schedule
Daily
Report Available
1-2 days
Limitations
Negative results can occur in samples containing low levels of antigen. Consider collecting multiple specimens over a few days for patients highly suspected of being positive.
Reference Range
Negative for Cryptosporidium and Giardia Antigen
Clinical Significance
Detection of a pathogen suggests an infectious cause of diarrhea. Diarrhea may be caused by a number of pathogens and other factors.
Performing Laboratory
Inova Laboratories
2832 Juniper Street
Fairfax, VA 22031
Last Updated: February 20, 2023
Last Review: N. Wolford, February 20, 2023