Allergen Specific IgE Tree of Heaven (Ailanthus) Biomarker Testing
It measures IgE sensitization to Tree of Heaven pollen and helps guide allergy next steps, with easy ordering and Quest lab access via Vitals Vault.
From $110 · Quest Diagnostics
- No subscription
- HSA/FSA eligible
- Most results in 3–5 business days
This test looks for allergen-specific IgE antibodies to Tree of Heaven (Ailanthus altissima). IgE is the antibody type that drives immediate-type allergy symptoms, such as sneezing, itchy eyes, hives, and wheezing.
A positive result does not automatically mean you will react every time you are exposed. It means your immune system is sensitized, and the result becomes most useful when it matches your real-world symptoms and timing.
Because Tree of Heaven is an invasive plant in many regions, exposure can be hard to recognize. Testing can help you and your clinician decide whether this pollen is a likely contributor to seasonal symptoms and whether broader pollen testing is worth adding.
Do I need an Allergen Specific IgE Tree of Heaven test?
You may consider Tree of Heaven specific IgE testing if you get predictable seasonal allergy symptoms—like congestion, runny nose, post-nasal drip, itchy or watery eyes, cough, or asthma flares—and you suspect outdoor pollen exposure but cannot pinpoint the trigger.
This test can also be helpful if your symptoms persist despite typical allergy steps (avoiding obvious triggers, using antihistamines or nasal sprays as directed), or if you are trying to decide whether allergy immunotherapy (allergy shots or drops, when appropriate) should be discussed.
Testing is especially practical when skin testing is not an option for you, such as when you cannot stop antihistamines, you have certain skin conditions, or you prefer a blood draw approach.
Your result is one piece of the puzzle. It supports clinician-directed care and exposure planning, but it cannot diagnose allergy on its own without your symptom history.
This is a laboratory-developed, CLIA-validated allergen-specific IgE blood test; results should be interpreted with your symptoms and clinician guidance rather than used as a standalone diagnosis.
Order labs to measure Allergen Specific IgE Tree of Heaven
from $110 at Quest Diagnostics.
Get this test with Vitals Vault
Vitals Vault lets you order Tree of Heaven allergen-specific IgE testing without needing to coordinate a separate referral. You complete checkout, visit a local lab draw site, and then view your results in your Vitals Vault dashboard.
Once your result is back, PocketMD can help you translate the number into plain language, connect it to your symptom pattern, and suggest reasonable follow-up questions for your clinician—such as whether to add a broader pollen panel, evaluate asthma control, or review medication timing.
If you are tracking seasonal symptoms, you can also use Vitals Vault to retest later when it is clinically appropriate, so you can compare results over time alongside changes in exposure, treatment, or living environment.
- Order online and complete testing through a national lab network
- Results stored in one place for easy comparison over time
- PocketMD support to help you prepare for a clinician conversation
Key benefits of Allergen Specific IgE Tree of Heaven testing
- 01Helps identify whether Tree of Heaven pollen sensitization could be contributing to seasonal allergy symptoms.
- 02Provides an objective data point when your exposure history is unclear or symptoms overlap with other pollens.
- 03Supports decisions about whether broader inhalant allergy testing is worth adding.
- 04Can be used when skin testing is inconvenient or when you cannot stop antihistamines.
- 05Helps you plan targeted avoidance steps during high-pollen periods if the result fits your symptom timing.
- 06Adds context for asthma or cough symptoms that worsen outdoors or seasonally.
- 07Creates a baseline you can review in PocketMD and share with your clinician when discussing next steps.
What is Allergen Specific IgE Tree of Heaven?
Allergen-specific IgE is a blood measurement of IgE antibodies that recognize a particular allergen. In this case, the allergen source is Tree of Heaven (Ailanthus altissima), a plant whose pollen can act as an inhalant trigger for some people.
If you are sensitized, your immune system has made IgE that can bind to Tree of Heaven proteins. With exposure, that IgE can contribute to the release of histamine and other inflammatory signals, which is why symptoms can show up quickly—often within minutes to hours—especially in the nose, eyes, skin, and airways.
This test does not measure how severe your symptoms will be. It measures sensitization, which is why the most accurate interpretation comes from matching the result to your real-life pattern: when symptoms happen, what environments trigger them, and whether symptoms improve with avoidance or treatment.
Sensitization vs. clinical allergy
A positive Tree of Heaven IgE result means your immune system recognizes the allergen, but you may not notice symptoms with every exposure. Clinical allergy is when sensitization and symptoms line up consistently. A negative result makes Tree of Heaven less likely as a driver, but it does not rule out other pollens or non-allergic causes of similar symptoms.
How this differs from total IgE
Total IgE is a broad measure of IgE in your blood from all sources. Allergen-specific IgE is targeted to one allergen source. You can have normal total IgE and still have a meaningful positive specific IgE to a particular pollen, and you can have elevated total IgE for reasons that do not point to Tree of Heaven specifically.
What do my Allergen Specific IgE Tree of Heaven results mean?
Low
Low (or negative) Tree of Heaven specific IgE
A low or negative result generally means Tree of Heaven sensitization is unlikely. If you still have strong seasonal symptoms, the next step is often to test other common inhalant allergens in your region (other trees, grasses, weeds, molds, dust mites, and animal dander). If symptoms are year-round, your clinician may also consider non-allergic rhinitis, chronic sinus issues, reflux, or irritant exposures.
Optimal
In-range results (lab-reported reference range)
For allergen-specific IgE, many labs report a reference interval where values below a cutoff are considered negative. If your result falls in that range, it usually supports looking elsewhere for the trigger rather than focusing on Tree of Heaven. If your symptoms strongly track with outdoor pollen seasons, ask whether a broader panel would better match your exposure pattern.
High
High (positive) Tree of Heaven specific IgE
A high result suggests sensitization to Tree of Heaven. The most important question is whether it matches your symptoms—such as flares during local pollination periods or when you spend time near areas where the plant is common. Higher values can correlate with a greater likelihood of clinical reactivity, but they do not reliably predict symptom severity, and treatment decisions should be based on your history and overall allergy profile.
Factors that influence Tree of Heaven specific IgE
Timing and exposure matter: if you have limited exposure, you may have a positive test but few symptoms, or the opposite if another allergen is the real driver. Cross-reactivity can also occur, where IgE recognizes similar proteins across different pollens, which is one reason broader testing and clinical correlation are helpful. Medications like antihistamines generally do not suppress blood specific IgE results the way they can affect skin testing. Age, atopic conditions (eczema, asthma), and overall allergic tendency can influence how likely you are to have multiple positive sensitizations.
What’s included
- Tree Of Heaven (Ailanthus Spp) Ige*
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Frequently Asked Questions
Do I need to fast for a Tree of Heaven specific IgE blood test?
Fasting is usually not required for allergen-specific IgE testing. If you are combining this with other labs that do require fasting, follow the instructions for the full order.
What does a positive Tree of Heaven IgE mean?
A positive result means sensitization: your immune system has IgE that recognizes Tree of Heaven allergen proteins. It is most meaningful when it matches your symptoms and exposure timing, because sensitization alone does not prove you will have noticeable reactions.
Can antihistamines affect allergen-specific IgE blood test results?
Antihistamines typically do not significantly change blood specific IgE results. They can interfere with skin prick testing, which is one reason some people choose blood testing when they cannot stop allergy medications.
Is this the same as a skin prick allergy test?
No. Skin testing measures a reaction in the skin after exposure to allergen extracts, while this test measures IgE antibodies in your blood. Both can be useful, and your clinician may prefer one method depending on your history, medications, and risk profile.
How long does it take to get results?
Turnaround time varies by lab and logistics, but many allergen-specific IgE results return within a few business days after your blood draw. Your Vitals Vault dashboard will update when the result is released.
When should I retest Tree of Heaven IgE?
Retesting is not always necessary. It can be reasonable if your exposure environment changes, your symptoms change substantially, or you are monitoring an allergy treatment plan under clinician guidance. Many people focus more on symptom tracking and broader allergen mapping than repeating a single IgE value.