Soybean IgG4
Use
The clinical utility of food-specific IgG4 tests has not been clearly established. These tests can be used in special clinical situations to select foods for evaluation by diet elimination and challenge in patients who have 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 but cutoffs have not been established.
Special Instructions
Reference ranges have not been established for food-specific IgG4 tests.
Limitations
The clinical significance of IgG4 antibodies against food antigens is unclear, and the presence of such antibodies does not necessarily correlate with clinical allergy. Cutoffs for defining abnormal levels are not established.
Methodology
Immunoassay (Enzyme Immunoassay (FEIA))
Biomarkers
LOINC Codes
- 56390-8
- 56390-8
Result Turnaround Time
5-7 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
0.5 mL
Minimum Volume
Not provided
Container
Plastic vial
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 into 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 |