IgG4 Food Panel I
Use
The IgG4 Food Panel I test evaluates the presence of food-specific IgG4 antibodies associated with various food-related immune responses. While the clinical utility of food-specific IgG4 tests is not clearly established, they can be used in special clinical situations to aid in selecting foods for elimination diets or pre-evaluation in patients experiencing food-related complaints. The test may assist in managing dietary changes for such patients.
Special Instructions
Not provided.
Limitations
The IgG4 Food Panel I test has limitations due to the lack of established reference ranges and its uncertain clinical significance. It should only be used in particular clinical contexts, as it has not been cleared or approved by the FDA. The detection of food-specific IgG4 does not correlate directly with food allergies or intolerances. Cross-reactivity or false positives may occur, and results should be interpreted with caution.
Methodology
Immunoassay (FEIA)
Biomarkers
LOINC Codes
- 56301-5 - A-Lactalb IgG4-mCnc
- 56438-5 - Beef IgG4-mCnc
- 56207-4 - Casein IgG4-mCnc
- 56218-1 - Chicken IgG4-mCnc
- 56231-4 - Corn IgG4-mCnc
- 56255-3 - Whole Egg IgG4-mCnc
- 56234-8 - Cow Milk IgG4-mCnc
- 56429-4 - Potato IgG4-mCnc
- 56390-8 - Soybean IgG4-mCnc
- 56417-9 - Wheat IgG4-mCnc
Result Turnaround Time
2-10 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
1.5 mL
Minimum Volume
0.5 mL
Container
Plastic vial
Collection Instructions
Draw blood in a plain red-top tube(s), serum gel tube(s) is acceptable. Spin down and send 1.5 mL of serum refrigerated in a plastic vial.
Causes for Rejection
NA for Hemolysis, Lipemia, Icterus, and Other
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 7 days |
| Refrigerated | 28 days |
| Frozen | 365 days |