Asparagus, IgE, Serum
Use
This test is useful for establishing the diagnosis of an allergy to asparagus by measuring IgE antibodies specific to asparagus allergens. It helps define the allergen responsible for eliciting signs and symptoms such as allergic response or anaphylactic episodes. The test is also used to confirm sensitization prior to beginning immunotherapy and investigate allergic reactions' specificity to various allergens.
Special Instructions
Testing for IgE antibodies is not useful in patients previously treated with immunotherapy to determine if residual clinical sensitivity exists or in patients whose medical management does not depend upon identification of allergen specificity. If not ordering electronically, complete, print, and send the Allergen Test Request (T236) with the specimen.
Limitations
Some individuals with clinically insignificant sensitivity to allergens may have measurable levels of IgE antibodies in serum, which must be interpreted in context. False-positive results for IgE antibodies may occur in patients with markedly elevated serum IgE (>2500 kU/L) due to nonspecific binding to allergen solid phases. This test was developed and characteristics determined by Mayo Clinic in compliance with CLIA requirements but is not FDA cleared or approved.
New York Approved
Methodology
Immunoassay (FEIA)
Biomarkers
LOINC Codes
- 7099-5
- 7099-5
Result Turnaround Time
1-3 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
0.5 mL for every 5 allergens requested
Minimum Volume
For 1 allergen: 0.3 mL; More than 1 allergen: (0.05 mL x number of allergens) + 0.25 mL dead space
Container
Preferred: Serum gel; Acceptable: Red top; Submission: Plastic vial
Collection Instructions
Centrifuge and aliquot serum into a plastic vial.
Stability Requirements
| Temperature | Period |
|---|---|
| Refrigerated | 14 days |
| Frozen | 90 days |