Goat Epithelium, IgE, Serum
Use
The test is useful for establishing a diagnosis of an allergy to goat epithelium and for defining the specific allergen responsible for eliciting allergic signs and symptoms. It helps identify allergens responsible for allergic reactions and anaphylactic episodes, confirm sensitization before immunotherapy, and investigate the specificity of allergic reactions to substances such as insect venom, drugs, or chemicals. However, it is not useful for testing IgE antibodies in patients previously treated with immunotherapy to determine if residual clinical sensitivity exists.
Special Instructions
For ordering, if not done electronically, complete and send an Allergen Test Request form (T236) with the specimen. The test is performed Monday through Friday and is available for clients in New York State.
Limitations
The test has limitations, including the possibility of false-positive results in patients with markedly elevated serum IgE due to nonspecific binding. Measurable levels of IgE antibodies may be present in individuals with clinically insignificant sensitivity, and results must be interpreted in the clinical context. Testing for IgE antibodies is not useful in patients for whom medical management does not depend on the identification of allergen specificity.
New York Approved
Methodology
Immunoassay (FEIA)
Biomarkers
LOINC Codes
- 6127-5
- 6127-5
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
For 1 allergen: 0.3 mL; For more than 1 allergen: (0.05 mL x number of allergens) + 0.25 mL deadspace
Container
Preferred: Serum gel; Acceptable: Red top; Submission: Plastic vial
Collection Instructions
Centrifuge and aliquot serum into a plastic vial.
Causes for Rejection
Only gross hemolysis and lipemia are okay
Stability Requirements
| Temperature | Period |
|---|---|
| Refrigerated | 14 days |
| Frozen | 90 days |