Lettuce, IgE, Serum
Use
This test is used for establishing a diagnosis of an allergy to lettuce by identifying specific IgE antibodies in the patient's serum. It helps define the allergen responsible for eliciting signs and symptoms, confirming sensitization prior to beginning immunotherapy, and investigating the specificity of allergic reactions.
Special Instructions
Testing for IgE antibodies is not useful in patients previously treated with immunotherapy to determine if residual clinical sensitivity exists or in cases where medical management is not dependent on allergen specificity identification. For more allergens available for testing, see Allergens - Immunoglobulin E (IgE) Antibodies.
Limitations
Some individuals with clinically insignificant sensitivity to allergens may have measurable levels of IgE antibodies, indicating possible false positives. Elevated serum IgE levels (>2500 kU/L) can result in nonspecific binding, leading to false-positive results. Test results should always be interpreted in the clinical context.
FDA ApprovedNew York Approved
Methodology
Immunoassay (FEIA)
Biomarkers
LOINC Codes
- 6161-4
- 6161-4
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
0.3 mL for one allergen
Container
Preferred: Serum gel; Acceptable: Red top; Submission: Plastic vial
Collection Instructions
Centrifuge and aliquot serum into a plastic vial.
Causes for Rejection
Gross hemolysis: OK; Gross lipemia: OK
Stability Requirements
| Temperature | Period |
|---|---|
| Refrigerated | 14 days |
| Frozen | 90 days |