Egg White IgG4
Use
The clinical utility of food-specific IgG4 tests is not clearly established. However, these tests may be used in special clinical situations to select foods for evaluation by diet elimination and challenge in patients with food-related complaints, and to evaluate food-allergic patients prior to food challenges. The presence of food-specific IgG4 has been studied in response to various oral food immunotherapy treatments, although exact cutoffs have not been established.
Special Instructions
Not provided.
Limitations
Reference values for food-specific IgG4 tests have not been established. The test was developed and its performance characteristics were determined by Eurofins Viracor; it has not been cleared or approved by the U.S. FDA.
Methodology
Immunoassay (FEIA)
Biomarkers
LOINC Codes
- 56253-8 - Egg White IgG4-mCnc
- 56253-8 - Egg White IgG4-mCnc
Result Turnaround Time
4-7 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
0.5 mL
Minimum Volume
Not provided
Container
Preferred: Red Top; Acceptable: Serum gel
Collection Instructions
1. Draw blood in a plain red-top tube(s), serum gel tube(s) is acceptable. 2. Centrifuge and aliquot 0.5 mL of serum in a plastic vial. 3. Send refrigerate.
Causes for Rejection
Thawing: Cold OK; Warm OK
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 7 days |
| Refrigerated | 28 days |
| Frozen | 365 days |