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Serum or plasma concentration of ragweed pollen-specific immunoglobulin E (IgE) antibodies

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

This test measures the level of antibodies your body produces in response to ragweed pollen, which can trigger allergic reactions.

Quick summary

["It helps identify if ragweed allergies may be contributing to symptoms like sneezing, itching, or respiratory issues."]

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

Key facts at a glance

LOINC
6124-2
Short code
Giant Ragweed IgE Qn
Synonyms
Giant 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 This Test Measures

IgE antibodies are part of your immune system’s defense mechanism. When your body encounters ragweed pollen, it may produce specific IgE antibodies against it. This test detects the presence and amount of these antibodies in your blood.

Why It’s Done

Doctors may order this test if you have symptoms like seasonal allergies, such as hay fever, or if you’ve been exposed to ragweed pollen and suspect an allergic reaction. It can also help confirm a diagnosis of ragweed allergy before starting allergy treatment.

What to Expect Before the Test

No special preparation is needed for this blood test. You may have a small needle inserted into your arm to draw a blood sample. The test is quick and typically done in a doctor’s office or lab.

What the Results Mean

Higher levels of ragweed-specific IgE antibodies suggest an allergic reaction to ragweed pollen. However, even low levels may indicate sensitivity. Results are used alongside other symptoms and medical history to diagnose allergies.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

IgE to Ragweed Pollen

Frequently asked questions

How often should I get this test?
This test is usually done once to confirm an allergy diagnosis. If you have ragweed allergies, your doctor may recommend retesting occasionally to monitor changes in your immune response or effectiveness of treatments.
Can I take allergy medication before the test?
Yes, you can take your usual allergy medications before the test, as they won’t affect the blood draw itself. However, inform your doctor about any medications you’re taking to ensure they’re aware of potential interactions.
What if my results are positive but I don’t have symptoms?
Positive results mean your body has produced antibodies against ragweed pollen, indicating a potential allergy. Even if you don’t currently have symptoms, this test helps identify a possible sensitivity that could develop later or affect you during pollen season.
  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