Hickory Pecan Tree T22 IgE (Allergy Blood Test) Biomarker Testing
It measures IgE sensitization to hickory/pecan tree pollen and helps explain seasonal allergy symptoms, with easy ordering and results via Vitals Vault/Quest.
With Vitals Vault, you have access to a comprehensive range of biomarker tests.
A Hickory Pecan Tree T22 IgE test is an allergy blood test that looks for IgE antibodies your immune system may make when you are sensitized to hickory/pecan tree pollen.
This test can be useful when your symptoms line up with tree pollen season, when you are comparing possible triggers, or when you cannot stop antihistamines long enough for skin testing.
Your number does not diagnose an allergy by itself. It is most helpful when you interpret it alongside your symptoms, timing, and other allergy results with a clinician.
Do I need a Hickory Pecan Tree T22 IgE test?
You may want this test if you get predictable seasonal symptoms such as sneezing, itchy or watery eyes, nasal congestion, post-nasal drip, cough, or asthma flares that seem worse in spring or early summer in areas where hickory or pecan trees are common.
It can also help when your symptoms are real but the trigger is unclear. For example, you might react outdoors, after yard work, or on windy days, and you want to separate tree pollen from grasses, weeds, dust mites, or pets.
This test is often ordered when you need an objective data point to guide next steps, such as environmental control strategies, a targeted medication plan, or discussing allergy immunotherapy (allergy shots or sublingual options) with an allergist.
If you have had a severe reaction (trouble breathing, throat tightness, fainting) after any exposure, treat that as urgent and get medical care. Lab testing supports clinician-directed care, but it is not a substitute for diagnosis or emergency planning.
This is a CLIA-lab immunoassay for allergen-specific IgE; results indicate sensitization risk and must be interpreted with your history, not used as a standalone diagnosis.
Lab testing
Order Hickory Pecan Tree T22 IgE testing
Schedule online, results typically within about a week
Clear reporting and optional clinician context
HSA/FSA eligible where applicable
Get this test with Vitals Vault
Vitals Vault makes it straightforward to order a Hickory Pecan Tree T22 IgE blood test and complete your draw through a national lab network. You get a clear lab report you can share with your clinician or allergist.
If you are trying to connect symptoms to patterns, you can pair this result with other tree, grass, weed, or indoor allergen IgE tests so your plan is based on evidence rather than guesswork.
When your result comes back, PocketMD can help you turn the number into practical next steps to discuss with your clinician, including what to test next, what to change at home, and when a retest makes sense (for example, after a season or after starting immunotherapy).
- Order online and complete testing through a national lab network
- Results you can track over time and share with your clinician
- PocketMD guidance to help you plan sensible follow-up
Key benefits of Hickory Pecan Tree T22 IgE testing
- Helps confirm whether hickory/pecan tree pollen is a likely contributor to your seasonal symptoms.
- Supports targeted avoidance steps (timing outdoor activity, filtration, and pollen control) instead of broad trial-and-error.
- Can be used when skin testing is not practical or when you cannot stop certain medications.
- Improves interpretation of overlapping pollen seasons by separating tree pollen sensitization from grass or weed triggers.
- Provides a baseline you can compare over time, especially if you start allergy immunotherapy.
- Helps your clinician decide what additional IgE tests are most useful, rather than ordering an unfocused list.
- Gives you a concrete result to review in PocketMD so your next steps are personalized and realistic.
What is Hickory Pecan Tree T22 IgE?
Hickory Pecan Tree T22 IgE is a blood test that measures allergen-specific immunoglobulin E (IgE) directed at hickory/pecan tree pollen. IgE is the antibody class involved in immediate-type allergic reactions.
If you are sensitized, your immune system has learned to recognize proteins in that pollen and can trigger histamine release when you inhale it. That can lead to symptoms such as allergic rhinitis (hay fever), conjunctivitis (itchy eyes), or asthma symptoms in susceptible people.
This test does not measure how much pollen you were exposed to, and it does not prove that hickory/pecan pollen is the cause of your symptoms. It measures the likelihood that your immune system is primed to react, which is why your symptom pattern and seasonality matter.
Sensitization vs. clinical allergy
A positive IgE result means sensitization, which is a risk marker for allergy. Clinical allergy means you actually get symptoms with real-world exposure. Some people have detectable IgE but minimal symptoms, while others have strong symptoms with modest IgE levels.
How this fits into an allergy workup
Specific IgE tests are most informative when they match your story: timing, location, triggers, and response to medications. Your clinician may interpret T22 alongside other tree pollens and indoor allergens to see whether your symptoms are likely driven by one main trigger or by multiple overlapping exposures.
What do my Hickory Pecan Tree T22 IgE results mean?
Low or undetectable T22 IgE
A low or undetectable result makes hickory/pecan pollen sensitization less likely, but it does not completely rule it out. If your symptoms are strongly seasonal, your clinician may look at other tree pollens, grasses, weeds, or indoor allergens that can mimic the same symptom pattern. If you were tested far from the season, the result is still valid because IgE reflects sensitization, not a short-lived exposure level.
In-range / negative (lab-specific cutoffs)
For allergy IgE tests, “optimal” usually means negative or below the lab’s positivity threshold. In that case, it is more productive to focus on other triggers and on non-allergic causes of congestion (such as chronic sinus inflammation, irritant exposure, or reflux) if symptoms persist. If you have a convincing exposure history, your clinician may consider repeating testing or using a different testing method.
Elevated / positive T22 IgE
A positive result suggests you are sensitized to hickory/pecan tree pollen and that it could be contributing to your symptoms, especially if symptoms flare during local tree pollen season. Higher values generally increase the likelihood of clinical allergy, but the number alone does not predict how severe your symptoms will be. Your clinician may use this result to guide a focused plan, including environmental controls, medication timing, and whether immunotherapy is worth discussing.
Factors that influence T22 IgE results
Your result is influenced by your immune pattern, not just exposure, so it can stay relatively stable across weeks and change more gradually over months to years. Cross-reactivity can matter: proteins in related tree pollens may cause IgE that appears to “light up” more than one tree on testing. Total IgE levels, eczema, asthma, and other allergic diseases can raise the chance of multiple positive results, which is why matching the lab to your symptom timing is important. Immunotherapy and long-term changes in exposure can shift IgE over time, so retesting is usually done to support clinical decisions rather than out of curiosity.
What’s included
- Hickory/Pecan Tree (T22) Ige
Frequently Asked Questions
What does the Hickory Pecan Tree T22 IgE test measure?
It measures allergen-specific IgE antibodies to hickory/pecan tree pollen (test code T22). A positive result indicates sensitization, which may or may not match your real-world symptoms.
Do I need to fast before a T22 IgE blood test?
Fasting is not typically 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.
Can antihistamines affect Hickory/pecan IgE blood test results?
Antihistamines generally do not lower allergen-specific IgE levels, so they usually do not interfere with this blood test the way they can with skin prick testing. Always confirm medication guidance with your clinician, especially if you are on steroids or immune-modifying therapies.
What is a normal range for T22 IgE?
The lab report will show the reference threshold used to call a result negative or positive, and some labs also provide “classes.” Because cutoffs and reporting formats vary by lab method, it is best to interpret your exact value using the reference information printed on your report.
If my T22 IgE is positive, does that mean I will have severe symptoms?
Not necessarily. Higher IgE levels can increase the likelihood of clinical allergy, but symptom severity depends on many factors, including pollen counts, other allergies, asthma status, and how reactive your nasal and airway tissues are.
When should I retest Hickory Pecan Tree IgE?
Retesting is usually considered when it will change a decision, such as evaluating trends after starting immunotherapy or reassessing a confusing symptom pattern. Many people wait at least 6–12 months for a meaningful change, unless your clinician recommends a different timeline.
Is this test the same as a food pecan allergy test?
No. This test targets tree pollen (inhalant allergy), not pecan as a food. If you react to eating pecans or other tree nuts, you should ask about food-specific IgE testing and an individualized safety plan.