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Epic Code LAB1230750 IgE Wormwood

Test Name Alias

allergen | ImmunoCAP | RAST | Allergy | Allergen Specific IgE | Absinthe | Artemisia absinthium | Common Wormwood | Sagebrush Wormwood | Sagewort

Interface Order Alias


Clinical Information

All allergens are reported down to a cutoff level of 0.10 kU/L. The significance of allergen specific IgE levels between 0.10 and 0.35 kU/L remains undefined. Cumulative levels of multiple allergen specific IgE antibodies may have an additive effect in producing clinical symptoms.

Individual allergen specific IgE antibody levels may not always correlate with severity of clinical symptoms. Results must be interpreted in the context of the clinical history and the patient’s symptom presentation. Quantitative IgE levels can serve to guide overall disease management by targeted trigger exposure reduction to identified allergens.

IgE antibody levels to allergens less than 0.10 kU/L do not exclude the possibility of an anaphylactic reaction to the allergen involved, since in vitro assays are indicators of previous sensitization rather than predictors of future response. IgE antibody levels must be interpreted in the context of the clinical history of the patient and the reaction history involved.

Collection Instructions

Specimen Collection: Blood

Container(s): Gold Top (Serum Separator-SST Gel)

Preferred Volume to Collect: Full tube (5 mL)

Minimum Volume to Collect: 2.0 mL

Neonate Volume to Collect: 2.0 mL

Capillary collect ok? Yes

Microtainer acceptable: Yes

Collection Instructions:

  • Gently invert gold tube(s) 8 – 10 times to mix clot activator with blood.
  • Specimen should be processed within 2 hours – See Processing Instructions.
  • 1 full tube per 15 – 20 allergens.


Processing Instructions (Laboratory, Outpatient or Off-site collection)

  • Processed Specimen: Serum

  • Centrifuge/Spin: Yes

  • Aliquot: No

  • Processing Instructions: 

    • Allow blood to clot for 30 minutes in a vertical position and centrifuge within 2 hours. 

    • Minimum volume: 0.3 mL SERUM

    • Refrigerate after centrifugation.

  • Transport Temperature: Refrigerate

Rejection Criteria

  • Quantity not sufficient (QNS)

Specimen Stability

Ambient: 12 hours
Refrigerate: 7 days
Frozen: aliquot serum for longer storage
Laboratory Retention: 30 days

Test Frequency

Available Monday through Friday, usual TAT 1-3 days.

Reference Range

<0.35 kU/L

Performing Department


Performing Department Laboratory Location

Corewell Health Reference Laboratory, Grand Rapids, MI


ImmunoCAP® System Fluorescence Enzyme Immunoassay (FEIA)



CDM Code


Epic Test ID




Mayo Access Code

Currently unavailable

Additional Information

Lab Staff:
For 1 allergen: 0.3mL serum
For more than 1 allergen: (0.05 mL x number of allergens) + 0.25mL dead space
1 tube per panel

Reviewed Date