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: Wormwood IgE Antibody, Serum

Published: August 9, 2026Updated: August 17, 2026

: This test measures immunoglobulin E (IgE) antibodies in serum that are specific to wormwood (Artemisia) pollen, helping to assess whether a person has an allergic sensitization to this common weed pollen.

Quick summary

[": A positive wormwood IgE result indicates allergic sensitization to wormwood pollen and must be interpreted alongside a patient's symptoms and exposure history."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
102665-7
Short code
Wormwood IgE RAST
Synonyms
Wormwood IgE RAST
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
10
Ref high
40
Critical range
— – 500 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
rast
CPT
84484
SNOMED
302774002
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

: What This Test Measures

: The test measures the amount of IgE antibody in a blood (serum) sample that binds specifically to wormwood pollen proteins. IgE is the antibody class most closely linked to immediate allergic reactions, so its presence at detectable levels suggests the immune system has been sensitized to wormwood.

: Why It Is Ordered

: A clinician may order this test when a person has allergy-like symptoms—such as sneezing, nasal congestion, itchy or watery eyes, or wheezing—that occur during weed pollen seasons, particularly in late summer and fall. It can also help clarify which specific pollen is triggering symptoms when several allergens are possible.

: How the Test Is Done

: A small blood sample is drawn from a vein, usually in the arm, and sent to a laboratory. The serum is then analyzed for wormwood-specific IgE, often using an immunoassay method. No special preparation is typically required unless your clinician gives other instructions.

: What Results Mean

: Results are usually reported on a graded scale or in concentration units, but exact reference cutoffs vary by laboratory. A detectable or elevated level suggests sensitization to wormwood, while an undetectable result makes sensitization less likely. Results do not predict how severe symptoms will be and should be interpreted with your symptom history.

Reference range

Adult: 10-40 U/LN/A

Specimen: serum

No special preparation required. Avoid fatty meals before the test if possible.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

: Wormwood IgE

Frequently asked questions

: Does a positive result mean I am allergic to wormwood?
: Not necessarily. A positive result shows that your immune system has made IgE antibodies to wormwood, which is called sensitization. Whether you actually have allergy symptoms depends on your exposure and clinical history, so the result must be interpreted by your clinician.
: Do I need to fast before this test?
: Fasting is generally not required for allergen-specific IgE blood tests unless your clinician orders other tests that require it. Follow any specific preparation instructions provided by your healthcare team.
: What is wormwood pollen and when is it present?
: Wormwood is a weed in the Artemisia family, and its pollen is a known seasonal allergen. Pollen levels are typically highest in late summer and fall, so symptoms often follow seasonal exposure patterns.
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 17, 2026. · Read our editorial policy