Sweet Potato, IgE, Serum
Use
This test is useful for establishing a diagnosis of an allergy to sweet potato by identifying specific IgE antibodies in patient serum. It is relevant for defining the allergen responsible for eliciting allergic signs and symptoms. This is critical for patients needing confirmation of sensitization before beginning immunotherapy and for investigating the specificity of allergic reactions to various allergens, including insect venom, drugs, or chemical 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 situations where medical management does not depend on identification of allergen specificity. For a listing of allergens available for testing, see Allergens - Immunoglobulin E (IgE) Antibodies document.
Limitations
Some individuals with clinically insignificant sensitivity to allergens may show measurable levels of IgE antibodies, and test results must be interpreted in clinical context. False-positive results may occur in patients with elevated serum IgE (>2500 kU/L) due to nonspecific binding to allergen phases.
FDA ApprovedNew York Approved
Methodology
Immunoassay (ELISA)
Biomarkers
LOINC Codes
- 7627-3
- 7627-3
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 for 1 allergen; (0.05 mL x number of allergens) + 0.25 mL deadspace for more than one
Container
Preferred: Serum gel; Acceptable: Red top
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 |