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Allergen, Food, Tree Nuts With Reflex to Components, IgE
Ordering Recommendation
New York DOH Approval Status
Specimen Required
Multiple patient encounters should be avoided.
Serum separator tube.
Separate serum from cells ASAP or within 2 hours of collection. Transfer 1.5 mL serum to an ARUP standard transport tube. (Min: 1 mL). For multiple allergen orders refer to "Allergen Specimen Collection Instructions" at www.aruplab.com/testing/resources/specimen
Refrigerated
Postmortem samples
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 month
Methodology
Quantitative ImmunoCAP Fluorescent Enzyme Immunoassay
Performed
Sun-Sat
Reported
1-3 days
Reference Interval
| Test Number |
Components |
Reference Interval |
|---|---|---|
| Allergen, Food, Almond IgE | Less than or equal to 0.34 kU/L | |
| Allergen, Food, Brazil Nut IgE | Less than or equal to 0.34 kU/L | |
| Allergen, Food, Cashew IgE | Less than or equal to 0.34 kU/L | |
| Allergen, Food, Pecan IgE | Less than or equal to 0.34 kU/L | |
| Allergen, Food, Hazelnut IgE | Less than or equal to 0.34 kU/L | |
| Allergen, Food, Pistachio IgE | Less than or equal to 0.34 kU/L | |
| Allergen, Food, Walnut (Juglans spp) IgE | Less than or equal to 0.34 kU/L |
Interpretive Data
Allergen results of 0.10-0.34 kU/L are intended for specialist use as the clinical relevance is undetermined. Even though increasing ranges are reflective of increasing concentrations of allergen-specific IgE, these concentrations may not correlate with the degree of clinical response or skin testing results when challenged with a specific allergen. The correlation of allergy laboratory results with clinical history and in vivo reactivity to specific allergens is essential. A negative test may not rule out clinical allergy or even anaphylaxis.
| Reporting Range (reported in Ku/L) | Probability of IgE Mediated Clinical Reaction | Class Scoring |
|---|---|---|
| Less than 0.10 | No significant level detected | 0 |
| 0.10-0.34 | Clinical relevance undetermined | 0/1 |
| 0.35-0.70 | Low | 1 |
| 0.71-3.50 | Moderate | 2 |
| 3.51-17.50 | High | 3 |
| 17.51-50.00 | Very high | 4 |
| 50.01-100.00 | Very high | 5 |
| Greater than 100.00 | Very high | 6 |
FDA
Note
This assay will initially test brazil nut, cashew, pistachio, hazelnut, walnut, pecan, almond. If the brazil nut whole allergen result is greater than or equal to 0.1 kU/L, the brazil nut component Ber e 1 will be ordered. If the cashew whole allergen result is greater than or equal to 0.1 kU/L, the cashew component Ana o 3 will be ordered. If the hazelnut whole allergen result is greater than or equal to 0.1 kU/L, the hazelnut components Cor a 1, Cor a 8, Cor a 9, Cor a 14 will be ordered. If the walnut whole allergen result is greater than or equal to 0.1 kU/L, the walnut components Jug r 1 and Jug r 3 will be ordered. Additional charges apply.
Hotline History
Hotline History
CPT Codes
86003 x7; if reflexed, add 86008 per component
Components
| Component Test Code* | Component Chart Name | LOINC |
|---|---|---|
| 0055209 | Allergen, Food, Walnut (Juglans spp) IgE | 6273-7 |
| 0055447 | Allergen, Food, Pistachio IgE | 7613-3 |
| 0098617 | Allergen, Food, Hazelnut IgE | 6136-6 |
| 0099572 | Allergen, Food, Pecan IgE | 6208-3 |
| 0099573 | Allergen, Food, Cashew IgE | 6718-1 |
| 0099574 | Allergen, Food, Brazil Nut IgE | 6050-9 |
| 0099577 | Allergen, Food, Almond IgE | 6019-4 |
