Carrot, IgE, Serum
Use
This test is useful for establishing a diagnosis of an allergy to carrots. It helps in defining the allergen responsible for eliciting allergic signs and symptoms, and identifying allergens responsible for allergic responses and/or anaphylactic episodes. This test can confirm sensitization prior to beginning immunotherapy and investigate the specificity of allergic reactions to insect venom allergens, drugs, or chemical allergens. Testing for IgE antibodies is not useful in patients previously treated with immunotherapy to determine if residual clinical sensitivity exists or in patients where medical management does not depend on allergen specificity.
Special Instructions
To order this test, if not using electronic ordering, complete the [Allergen Test Request Form](https://www.mayocliniclabs.com/it-mmfiles/allergen-test-request-form.pdf) (T236) with the specimen. Contact Customer Service for assistance regarding test prices and establishing a fee schedule. For a listing of allergens available for testing, see [Allergens - Immunoglobulin E (IgE) Antibodies](https://www.mayocliniclabs.com/it-mmfiles/Allergens-IgE_Antibodies.pdf).
Limitations
Some individuals with clinically insignificant sensitivity to allergens may have measurable levels of IgE antibodies in serum. Test results must be interpreted in the clinical context. False-positive results for IgE antibodies can occur in patients with markedly elevated serum IgE (>2500 kU/L) due to nonspecific binding to allergen solid phases.
FDA ApprovedNew York Approved
Methodology
Immunoassay (FEIA)
Biomarkers
LOINC Codes
- 6061-6
- 6061-6
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; for more than 1 allergen: (0.05 mL x number of allergens) + 0.25 mL deadspace
Container
Preferred: Serum gel; Acceptable: Red top; Submission Container/Tube: Plastic vial
Collection Instructions
Centrifuge and aliquot serum into a plastic vial.
Storage Instructions
Refrigerated (preferred), 14 days; Frozen, 90 days
Causes for Rejection
Gross hemolysis: OK; Gross lipemia: OK
Stability Requirements
| Temperature | Period |
|---|---|
| Refrigerated | 14 days |
| Frozen | 90 days |