Peanut, IgE with Reflex to Peanut Components, IgE, Serum
Use
Evaluating patients with suspected peanut allergy and possible peanut cross-reactivity. The presence of specific IgE antibodies to common peanut allergenic components can assess potential allergy severity and cross-reactivity with other allergens.
Special Instructions
The test is not useful for patients previously treated with immunotherapy or when medical management does not depend on allergen specificity identification. If detectable total peanut IgE antibody is present, additional specific peanut allergen antibody testing will be performed at an additional charge.
Limitations
Results must be interpreted in the context of the patient's clinical evaluation and history of allergen exposures. Negative IgE results do not completely exclude the possibility of clinical allergic responses. Positive results only indicate potential sensitization; they are not diagnostic for peanut allergy. Some patients with high total peanut IgE levels may not show allergic reactions on food challenge due to specific nonallergenic IgE antibodies. False positives may occur with markedly elevated serum IgE due to nonspecific binding.
FDA ApprovedNew York Approved
Methodology
Immunoassay (FEIA)
Biomarkers
LOINC Codes
- 6206-7
- 6206-7
Result Turnaround Time
1-3 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
2 mL
Minimum Volume
1 mL
Container
Plastic vial
Collection Instructions
Centrifuge and aliquot serum into a plastic vial. Use a serum gel or red top container.
Causes for Rejection
Gross hemolysis, lipemia, and icterus are acceptable.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 7 days |
| Refrigerated | 14 days |
| Frozen | 90 days |