Duck Feathers, IgE, Serum
Use
The test is useful for establishing a diagnosis of an allergy to duck feathers and defining the allergen responsible for eliciting signs and symptoms. It is also used for identifying allergens responsible for allergic responses or anaphylactic episodes, confirming sensitization before beginning immunotherapy, and investigating the specificity of allergic reactions to insect venom allergens, drugs, or chemical allergens. IgE antibody testing is not useful in patients previously treated with immunotherapy to determine if residual clinical sensitivity exists or when medical management does not depend on allergen specificity.
Special Instructions
Tests for IgE antibodies are not useful in patients previously treated with immunotherapy to determine if residual clinical sensitivity exists or in patients where the medical management does not depend on allergen specificity. Forms are required if not ordering electronically, including the Allergen Test Request form.
Limitations
Some individuals with clinically insignificant sensitivity to allergens may have measurable levels of IgE antibodies in serum. 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. Test results depend on the IgE concentration and must account for clinical context and history.
FDA ApprovedNew York Approved
Methodology
Immunoassay (Fluorescence Enzyme Immunoassay (FEIA))
Biomarkers
LOINC Codes
- 6100-2
- 6100-2
Result Turnaround Time
1-3 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
0.5 mL
Minimum Volume
0.3 mL
Container
Serum gel or Red top tube, Plastic vial
Collection Instructions
Centrifuge and aliquot serum into a plastic vial.
Causes for Rejection
Gross hemolysis and gross lipemia are acceptable.
Stability Requirements
| Temperature | Period |
|---|---|
| Refrigerated | 14 days |
| Frozen | 90 days |