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IgE antibody to ragweed (serum/plasma)

Published: August 9, 2026Updated: August 16, 2026

This test measures the level of Immunoglobulin E (IgE) antibodies specific to ragweed pollen in your blood. IgE is part of your immune system’s response to allergens.

Quick summary

["IgE levels help identify potential ragweed allergies."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
7650-5
Short code
Deprecated Common Ragweed IgE Qn
Synonyms
Deprecated Common Ragweed IgE Qn
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 Does This Test Measure?

IgE antibodies are a type of protein your immune system produces in response to allergens, such as pollen. Ragweed IgE specifically targets ragweed pollen, which can trigger allergic reactions in sensitive individuals. This test detects the presence and amount of these antibodies in your blood.

Why Might You Need This Test?

Your healthcare provider may recommend this test if you suspect an allergy to ragweed, have symptoms like sneezing, itching, or skin reactions after exposure, or if you’ve been diagnosed with pollen allergies. It can help confirm whether ragweed is a trigger for your symptoms.

How Is the Test Performed?

A blood sample is drawn from a vein in your arm. The sample is then sent to a lab for analysis to measure the specific IgE antibodies against ragweed pollen. Results are typically available within a few days.

What Do My Results Mean?

Higher levels of ragweed IgE may indicate an allergic reaction risk when exposed to ragweed pollen. However, a positive test alone doesn’t confirm an allergy—other tests or clinical symptoms are needed for diagnosis.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: Understanding IgE and Allergies

Short name

Ragweed IgE

Frequently asked questions

How common is a positive result for ragweed IgE?
IgE levels can vary widely among individuals. A positive result suggests a possible allergic reaction to ragweed but doesn’t guarantee it. Many people with positive IgE tests don’t experience symptoms, while others may react strongly. Consult your doctor for interpretation.
Can I take allergy medication before this test?
Yes, you may take over-the-counter allergy medications (like antihistamines) before the test, as they won’t interfere with the IgE measurement. However, avoid prescription allergy medications (e.g., steroids) unless instructed by your provider.
Does this test show if I’m allergic to other pollens?
No, this test specifically measures IgE antibodies to ragweed pollen. For broader pollen allergy assessment, additional tests (e.g., skin prick tests) may be needed to check reactions to other allergens like grass or tree pollen.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

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 16, 2026. · Read our editorial policy