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IgE to Southern Ragweed (Allergen-Specific Immunoglobulin E)

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

This test measures the level of Immunoglobulin E (IgE) antibodies specific to Southern ragweed pollen in your blood. IgE is a type of antibody that your immune system produces in response to allergens like pollen.

Quick summary

["Helps identify if ragweed pollen triggers allergic reactions in you."]

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

Key facts at a glance

LOINC
7655-4
Short code
Southern Ragweed IgE Qn
Synonyms
Southern 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 part of your immune system’s response to allergens. When your body encounters ragweed pollen, it may produce IgE specific to that pollen. This test detects the presence and amount of these IgE antibodies in your blood.

Why Might You Need This Test?

Doctors may recommend this test if you suspect ragweed pollen is causing symptoms like sneezing, itching, runny nose, or skin reactions. It helps doctors determine if ragweed is a trigger for your allergies and guides treatment plans.

How Is the Test Performed?

A small blood sample is drawn from your arm. The sample is then tested in a lab to measure the specific IgE antibodies against Southern ragweed pollen. The results help assess your allergic sensitivity.

What Do the Results Mean?

Higher levels of Southern ragweed-specific IgE may indicate a stronger allergic reaction to ragweed pollen. However, even low levels can be significant if you experience symptoms. Results are used alongside other allergy tests and symptoms to diagnose allergies.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Elevated IgE levels to Southern ragweed suggest an allergic reaction to the pollen. This test helps confirm allergies, monitor treatment effectiveness, or guide allergy immunotherapy (allergy shots) if needed. It’s particularly useful for people with seasonal allergies or ragweed-related symptoms like hay fever or skin rashes.

Short name

Southern Ragweed IgE

Frequently asked questions

What does a positive result mean?
A positive result means your immune system has detected IgE antibodies specific to Southern ragweed pollen, which may indicate an allergic reaction to it. This doesn’t necessarily mean you’ll have symptoms, but it can help doctors confirm an allergy if symptoms are present.
How long does it take to get results?
Results are typically available within 1 to 3 business days after the blood sample is processed. Your doctor will discuss the findings with you during your follow-up visit.
Can I take anything before this test?
No special preparations are needed for this test. However, if you’re taking allergy medications, inform your doctor before the test, as they may affect results or your treatment plan.
  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