Walnut, Black IgG4
Use
This test measures allergen-specific IgG4 antibodies to Black Walnut (Juglans nigra). Though food-specific IgG4 testing has not been clearly established for general diagnostic purposes, physicians may use it in special clinical situations such as evaluation prior to or during immunotherapy. Use should be limited to providers familiar with its limitations.
Special Instructions
Not provided.
Limitations
The clinical utility of food-specific IgG4 tests has not been clearly established; these tests should only be ordered by physicians who recognize their limitations and use them in appropriate clinical contexts only.
Methodology
Immunoassay (ELISA)
Biomarkers
Result Turnaround Time
2-3 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
0.5 mL
Minimum Volume
Not provided
Container
Red Top or Gold Top (SST) tube
Collection Instructions
Collect via venipuncture in SST or red top tube; centrifuge and transfer serum to aliquot tube.
Storage Instructions
Transport to laboratory refrigerated.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 1 week |
| Refrigerated | 4 weeks |
| Frozen | 4 weeks |