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Giantragweed (Ragweed Pollen) Immunoassay (IgE Antibody)

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

This test measures the level of Immunoglobulin E (IgE) antibodies your body produces in response to exposure to giant ragweed pollen, a common allergen.

Quick summary

["Assesses allergy sensitivity to ragweed pollen through IgE antibodies."]

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

Key facts at a glance

LOINC
7649-7
Short code
Giant Ragweed BasoBnd Ab Qn
Synonyms
Giant Ragweed BasoBnd Ab Qn
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
lhr
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your healthcare provider may recommend this test if you experience symptoms like sneezing, itching, runny nose, or skin reactions after exposure to ragweed pollen, especially during late summer or early fall when ragweed blooms. It helps determine if ragweed is triggering your allergic reactions.

What to Expect During the Test

A small blood sample is taken from your arm. The blood is processed to detect IgE antibodies specific to ragweed pollen. This test is typically done in a lab and may be part of an allergy evaluation.

What the Results Mean

High levels of ragweed-specific IgE antibodies suggest an allergic reaction risk. However, elevated levels alone don’t confirm an allergy without clinical symptoms. Results are used alongside other allergy tests and patient history for diagnosis.

Common Symptoms Linked to Ragweed Allergy

Symptoms may include seasonal allergies (hay fever), skin rashes, asthma flare-ups, or even more severe reactions in rare cases. If you suspect an allergy, discuss symptoms with your doctor.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test helps confirm ragweed allergy by identifying IgE antibodies, guiding treatment options like allergy shots (immunotherapy) or avoiding ragweed exposure. It’s often used alongside skin prick tests or blood tests for other allergens.

Short name

Ragweed Pollen IgE

Frequently asked questions

What does a positive result mean?
A positive result indicates your immune system may react to ragweed pollen, but it doesn’t guarantee an allergy without symptoms. Your doctor will interpret results in the context of your symptoms and other tests.
How often should I get this test?
This test is usually done once as part of an allergy evaluation. If symptoms persist, your doctor may recommend retesting or additional allergy testing.
Can I take anything special before the test?
No special preparation is needed. Avoid antihistamines 2–3 days before testing if possible, as they may affect results. Follow your doctor’s instructions for any other preparations.
  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