A patient seated in the chair before a blood draw
In person

Wall Pellitory (Parietaria judaica) Allergy (IgE)

Measures IgE to Parietaria judaica pollen from one blood draw.

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  • 2,000+ lab locations. Find one near you
  • Nothing due at the lab. FSA / HSA accepted
  • Ordered by a licensed clinician

At a glance

Collection
Blood draw
A standard blood draw at the lab.
Preparation
None
Nothing to do ahead of time. Water is fine.
Results
3 to 5 days
Typical turnaround after your visit.
Where
2,000+ lab locations
Nationwide, with nothing due at the lab.

About this test

Wall pellitory (Parietaria judaica) pollen is a spring to fall weed pollen, and this test measures IgE antibodies to it in your blood. Wall pellitory (Parietaria judaica) is common in California and the Gulf coast. A positive result shows sensitization, not necessarily an allergy. No fasting is needed.

For adults 18 and older. Test availability varies by lab location.

Who should take this test?

This test is for adults whose sneezing, congestion, or itchy eyes seem to line up with the spring to fall season each year and who want to check for IgE to Parietaria judaica pollen.

Ask about this test

Not sure this is the right test?

AI-generated. For information only, not medical advice. Call 911 for an emergency.

What does this test measure?

Your Parietaria judaica result can help you and a healthcare provider understand whether sensitization to this weed pollen may be part of your seasonal symptoms.

Parietaria judaica pollen-specific IgE
Specific IgE is an antibody the immune system can make against one allergen. This marker measures IgE that recognizes wall pellitory (Parietaria judaica) pollen, a spring to fall weed pollen. A level above the lab’s reference range shows sensitization, read with the timing of your symptoms.
Why it’s measured: Checks for IgE sensitization to Parietaria judaica pollen when symptoms follow the spring to fall season.

How it works

  1. Step 1

    Order online

    Check out here. A licensed clinician in your state reviews your order and sends it to the lab.

  2. Step 2

    Visit a lab

    Bring a photo ID to any of 2,000+ lab locations. No fasting needed, and nothing is due at the lab.

  3. Step 3

    Get your results

    Results post to your account, usually in 3 to 5 days, each number next to the lab’s reference range.

Find a lab near you

Choose from 2,000+ lab locations nationwide. Your order works at any of them.

What your results tell you

The lab reports an IgE level in kU/L and compares it with its reference range. A level above that range means you are sensitized.

  • Your number next to the lab’s reference range
  • Explained in plain language
  • A licensed clinician reviews your order and, if appropriate, orders the test.
  • A lab report you can download and share

An allergist or other healthcare provider reads this result with the timing of your symptoms and decides on any next steps.

Clinical-grade testing, from the comfort of home.

From the lab to your report, every step of our process meets the gold standard in medical testing.

  • CLIA-certified labs

    Every lab we partner with is certified under the Clinical Laboratory Improvement Amendments, meeting both state and federal standards with regular independent inspections.

  • We protect your health data

    We protect your health data with encryption and do not sell it. Some results must be reported to public health authorities by law. See our Privacy Notice.

  • Rigorous quality assurance

    All partner labs run regular internal quality checks, participate in proficiency testing, and comply with federal and state lab regulations.

  • Clinician-reviewed reports

    Results are reviewed by an independent, licensed clinician.

Questions

Common questions.

Anything else, our care team answers by phone, text, or email.

Not on its own. A positive result means your immune system has made IgE to wall pellitory (Parietaria judaica) pollen, which is called sensitization. Many people who are sensitized have no symptoms when they are exposed.

A diagnosis of allergy is made by a healthcare provider who looks at your symptoms and history along with results like this one. A negative result also does not by itself mean you are not allergic.

Wall pellitory (Parietaria judaica) pollen is a spring to fall weed pollen, common in California and the Gulf coast. Pollen seasons can shift with weather and location.

When your symptoms happen is one clue an allergist uses alongside a result like this. A positive result shows sensitization, not that this pollen causes your symptoms.

Both look for IgE sensitization. A skin test checks how your skin responds to a small amount of an allergen, while this test measures IgE to Parietaria judaica pollen in a blood sample. In many cases the two are considered comparable.

A blood test may be preferred in some situations, such as a widespread skin condition or recent use of medicines that affect skin tests. Don’t stop or change any medicine without talking with your healthcare provider.

Lab tests are informational and don’t diagnose conditions on their own. Available to adults 18 and older; test availability varies by lab location. A licensed clinician reviews your order and, if appropriate, orders the test. All testing is performed at CLIA-certified laboratories. Not for emergencies: if you think you may be having a medical emergency, call 911.