Cashew, IgE with Reflex to Cashew Component, IgE, Serum
Use
This test aids in the evaluation of patients suspected of having a cashew allergy. It measures IgE antibodies against cashew proteins to determine potential allergenic responses. The test involves an initial analysis of total cashew-specific IgE. If the initial result is positive, further testing for IgE antibodies to the component Ana o 3 is performed, providing insight into allergenic strength and type.
Special Instructions
For additional allergens and comprehensive allergen listings, refer to the Allergens - Immunoglobulin E (IgE) Antibodies guide. Forms need to be included if not ordering electronically.
Limitations
In vitro IgE testing results should be correlated with clinical history. Negative IgE for cashew does not fully exclude allergic potential, and positive results alone do not confirm allergy. Technical limitations include potential false positives in samples with high serum IgE (>2500 kU/L) and cross-reactivity due to carbohydrate determinants. IgE testing is less useful in patients undergoing or post immunotherapy for clinical sensitivity assessment.
FDA ApprovedNew York Approved
Methodology
Immunoassay (FEIA)
Biomarkers
LOINC Codes
- 6718-1
- 6718-1
Result Turnaround Time
1-3 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
0.6 mL
Minimum Volume
0.4 mL
Container
Plastic vial
Collection Instructions
Centrifuge and aliquot serum into a plastic vial.
Causes for Rejection
Ok for gross hemolysis, lipemia, icterus.
Stability Requirements
| Temperature | Period |
|---|---|
| Refrigerated | 14 days |
| Frozen | 90 days |