Cashew, IgE, Serum
Use
This test is useful for establishing a diagnosis of an allergy to cashew by identifying the specific allergen responsible for eliciting signs and symptoms. It also helps identify allergens responsible for allergic responses or anaphylactic episodes and confirms sensitization before starting immunotherapy. The test can also evaluate the specificity of allergic reactions to insect venom, drugs, or chemical allergens. However, it is not useful for determining residual clinical sensitivity in patients previously treated with immunotherapy or where management does not depend on allergen specificity.
Special Instructions
For ordering, a completed Allergen Test Request form must be included with the specimen if not ordered electronically. Also, ensure to follow collection instructions by centrifuging and aliquoting serum into a plastic vial.
Limitations
IgE testing may yield false-positive results in patients with extremely high serum IgE levels (>2500 kU/L) due to nonspecific binding to allergen solid phases. The presence of measurable IgE antibodies does not always correlate with clinical significance of the sensitivity.
FDA ApprovedNew York Approved
Methodology
Immunoassay (Fluorescence Enzyme Immunoassay (FEIA))
Biomarkers
LOINC Codes
- 6718-1
- 6718-1
Result Turnaround Time
0-3 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
Container
Plastic vial
Collection Instructions
Centrifuge and aliquot serum into a plastic vial.
Causes for Rejection
Gross hemolysis and lipemia are acceptable.
Stability Requirements
| Temperature | Period |
|---|---|
| Refrigerated | 14 days |
| Frozen | 90 days |