Penicillin V, IgE, Serum
Use
This test is useful for establishing a diagnosis of an allergy to penicillin V and defining the allergen responsible for eliciting signs and symptoms. It identifies allergens responsible for allergic response and/or anaphylactic episodes, confirms sensitization prior to beginning immunotherapy, and investigates the specificity of allergic reactions to insect venom allergens, drugs, or chemical allergens. Testing for IgE antibodies is not useful in patients previously treated with immunotherapy to determine if residual clinical sensitivity exists or in patients where the medical management does not depend upon identification of allergen specificity.
Special Instructions
For a comprehensive listing of allergens available for testing, refer to the Allergens - Immunoglobulin E (IgE) Antibodies PDF provided. If not ordering electronically, complete, print, and send an Allergen Test Request (T236) with the specimen.
Limitations
Some individuals with clinically insignificant sensitivity to allergens may have measurable levels of IgE antibodies in serum, so results must be interpreted in the clinical context. False-positive results for IgE antibodies may occur in patients with markedly elevated serum IgE (>2500 kU/L) due to nonspecific binding to allergen solid phases.
FDA ApprovedNew York Approved
Methodology
Immunoassay (FEIA)
Biomarkers
LOINC Codes
- 6210-9
- 6210-9
Result Turnaround Time
1-3 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
0.5 mL for every 5 allergens requested
Minimum Volume
0.3 mL for 1 allergen
Container
Preferred: Serum gel, Acceptable: Red top, Submission: Plastic vial
Collection Instructions
Centrifuge and aliquot serum into a plastic vial.
Storage Instructions
Refrigerated (preferred) for 14 days, Frozen for 90 days
Causes for Rejection
Gross hemolysis: OK, Gross lipemia: OK
Stability Requirements
| Temperature | Period |
|---|---|
| Refrigerated | 14 days |
| Frozen | 90 days |