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Serum Immunoassay for Ragweed-Specific Immunoglobulin E (IgE) (Qualitative)

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

This test measures your body’s immune response to ragweed pollen by detecting specific antibodies (IgE) that may trigger allergic reactions.

Quick summary

["Assesses potential ragweed allergy sensitivity through blood testing."]

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

Key facts at a glance

LOINC
112156-5
Short code
Common Ragweed IgE Qn IA
Synonyms
Common Ragweed IgE Qn IA
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ia
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

Why This Test Might Be Ordered

Your doctor may recommend this test if you experience symptoms like sneezing, itching, or skin reactions after exposure to ragweed pollen, especially during late summer or fall. It can help determine if ragweed is a cause of your allergies or if you’re at risk for allergic reactions.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, typically drawn from your arm. The test checks for the presence of IgE antibodies specific to ragweed pollen.

What the Results Mean

A positive result indicates your immune system has detected ragweed-specific IgE antibodies, which may suggest an allergy. However, a positive result alone doesn’t confirm an allergy—it may need further evaluation with allergy testing or symptoms.

Common Reasons for Testing

This test is often used as part of an allergy workup to identify potential triggers, especially if you have seasonal allergies or hives linked to pollen exposure. It helps guide treatment options like allergy immunotherapy.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Ragweed IgE Screen

Frequently asked questions

What does a positive result mean?
A positive result means your blood contains antibodies (IgE) that target ragweed pollen. This suggests your immune system may react to ragweed, but it doesn’t confirm an allergy without additional testing or symptoms. It’s a screening tool to explore possible triggers for allergic reactions.
Can this test predict future allergies?
No, this test can’t predict future allergies. It only indicates whether your body has produced ragweed-specific IgE antibodies at the time of testing. Allergies develop over time and require ongoing monitoring.
Does this test replace allergy testing?
No, this test is a screening tool. If your doctor suspects a ragweed allergy, they may recommend additional tests, like skin prick tests or allergy challenges, for confirmation.
  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