Rough Marsh Elder, IgE, Serum
Use
The test is useful for establishing a diagnosis of an allergy to rough marsh elder and defining the allergen responsible for eliciting signs and symptoms. It helps in identifying allergens responsible for allergic response and/or anaphylactic episodes, confirming sensitization prior to beginning immunotherapy, and investigating the specificity of allergic reactions to insect venom allergens, drugs, or chemical allergens. Testing for IgE antibodies provides an indication of the immune response to allergens associated with allergic disease.
Special Instructions
For a listing of allergens available for testing, refer to the "Allergens - Immunoglobulin E (IgE) Antibodies" PDF. Additionally, if not ordering electronically, complete, print, and send an Allergen Test Request form (T236) with the specimen.
Limitations
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 the identification of allergen specificity. Some individuals with clinically insignificant sensitivity may still have measurable levels of IgE antibodies, necessitating interpretation in the clinical context. False positives can occur in patients with markedly elevated serum IgE (>2500 kU/L) due to nonspecific binding to allergen solid phases.
New York Approved
Methodology
Immunoassay (Fluorescence Enzyme Immunoassay (FEIA))
Biomarkers
LOINC Codes
- 6232-3
- 6232-3
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
Container
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 |