Laboratory Services

Egg White IgE, Reflex to Components

Print this page

Updated Test Information:

Test Description
Egg White IgE, Reflex to Components
Test ID
General Information

An allergen is a type of antigen that initiates an immune response. After this initiation, also called sensitization, an allergic individual will produce IgE against that allergen. Specific IgE can be used to determine allergen sensitization, potential anaphylaxis response, and aid in disease management. Testing the individual components of an allergen, referred to as component resolved diagnosis (CRD), improves the predictive value for determining severity of allergen sensitization. Assay results should be used in conjunction with clinical findings and other serological tests.

Specimen Type


Alternate Specimen Type

Plasma (Na-Heparin or EDTA)

Specimen Requirements


Minimum Sample Volume

1.5 mL

Pediatric Min. Volume (if applicable)

750 uL

Additional Processing Details

Preferred: Centrifuge serum samples (SST, Red Top) within 2 hours of collection.
Alternate: if centrifuging is not possible, uncentrifuged serum samples (SST, Red Top) are acceptable.
Caution: Add-on testing may not be possible on serum samples that are received uncentrifuged. Serum/plasma samples are not to be repeatedly frozen and thawed, since this can cause analyte deterioration. They are to be thawed only once.


Stored at 2-8˚C: 7 Days
Specimens may be kept at controlled room temperature for shipping purposes only. Otherwise, they should be stored at 2-8˚C if assayed within 7 days or -20˚C for longer-term storage.


Fluorescent enzyme immunoassay (FEIA)

Estimated TAT

2-5 days

Testing Schedule

Monday-Saturday, alternating days

CPT Code(s)


Reference Range File INCYTE Allergy Reference Values
Reflex Conditions

If Egg White IgE is positive, an Egg White Component Panel will be performed. The Egg White Component Panel includes: Ovalbumin IgE and Ovomucoid IgE.

Performing Lab

Incyte Diagnostics

LOINC Code(s)