Allergen, Food, Beta-Lactoglobulin
Also known as: BETA-LACT
Use
This test is used to evaluate the presence of allergen-specific IgE antibodies to beta-lactoglobulin, a protein found in cow's milk. It assists in the diagnosis of allergic reactions to this specific allergen. Elevated levels of IgE antibodies may indicate sensitization to beta-lactoglobulin, which can be associated with clinical hypersensitivity reactions, including anaphylaxis, when exposed to cow's milk.
Special Instructions
Patients should avoid multiple encounters to ensure accurate allergen testing. Ensure serum is separated from cells within 2 hours of collection to preserve sample integrity. Refer to 'Allergen Specimen Collection Instructions' for details on handling multiple allergen orders.
Limitations
Results indicating an allergen-specific IgE level of 0.10-0.34 kU/L are for specialist use only as the clinical relevance is undetermined. The correlation of laboratory results with clinical history and in vivo reactivity is necessary, as concentrations may not correlate with clinical reactions or skin testing outcomes. Negative results do not rule out potential allergies or anaphylaxis.
FDA ApprovedNew York Approved
Methodology
Immunoassay (CLIA)
Biomarkers
LOINC Codes
- 41397-1
Result Turnaround Time
1-3 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
0.5 mL
Minimum Volume
0.25 mL
Container
ARUP Standard Transport Tube
Collection Instructions
Collect in a serum separator tube. Separate serum from cells ASAP or within 2 hours of collection.
Patient Preparation
Multiple patient encounters should be avoided.
Storage Instructions
Refrigerated transport.
Causes for Rejection
Hemolyzed, icteric, or lipemic specimens.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 48 hours |
| Refrigerated | 2 weeks |
| Frozen | 1 year |