Stemphylium Botryosum (m10) IgE Biomarker Testing
It measures IgE sensitization to Stemphylium botryosum mold to support allergy evaluation, with easy ordering and Quest-based lab access via Vitals Vault.
With Vitals Vault, you have access to a comprehensive range of biomarker tests.
This test looks for allergen-specific IgE antibodies to Stemphylium botryosum (m10), a type of outdoor mold. A positive result suggests your immune system is sensitized to this mold, which can contribute to allergy symptoms in the right exposure setting.
Because mold symptoms overlap with colds, asthma, and other allergies, testing can help you and your clinician narrow down whether mold is part of your trigger pattern. Your result is most useful when it is interpreted alongside your symptoms, seasonality, and other allergy tests.
Do I need a Stemphylium Botryosum (m10) IgE test?
You might consider this test if you have recurring nasal congestion, sneezing, post-nasal drip, itchy or watery eyes, cough, or wheezing that seems worse in damp environments or during certain seasons. It can also be helpful if your symptoms flare outdoors, around decaying vegetation, or after yard work, since many molds are more common outside than inside.
This test can be a good fit when you are trying to separate “mold” from other common triggers such as grasses, weeds, dust mites, or pet dander. If you already know you have allergic rhinitis or asthma, adding targeted mold IgE testing can help explain why symptoms persist despite typical avoidance steps.
You may not need this specific marker if your symptoms are clearly explained by another diagnosed allergy, or if you have no allergy-type symptoms at all. Testing supports clinician-directed care and planning, but it cannot diagnose an allergy condition by itself.
This is a laboratory measurement of allergen-specific IgE (often performed in a CLIA-certified lab); results should be interpreted with your history and are not a standalone diagnosis.
Lab testing
Order labs to measure Stemphylium botryosum (m10) IgE
from $23.99 at Quest Diagnostics
About 1 week
Schedule online — results typically within a week
Clear next steps
Guidance included, with follow-up care available
HSA / FSA
Eligible for pre-tax health spending accounts
Get this test with Vitals Vault
Vitals Vault lets you order Stemphylium botryosum (m10) IgE testing without needing to coordinate separate lab paperwork. Once your order is placed, you complete a standard blood draw at a participating lab location and receive a clear, shareable result.
If you are unsure how to connect your number to real-life symptoms, PocketMD can help you prepare questions for your next visit and understand common next steps, such as adding a broader inhalant allergy panel or timing a retest after a season of high exposure.
This test is most valuable when you use it to guide a plan: identifying likely triggers, deciding what additional allergens to check, and tracking whether your sensitization pattern matches your symptom calendar over time.
- Order online and complete a single blood draw at a lab location
- Results you can review with your clinician and keep for your records
- PocketMD support to help you interpret patterns and plan follow-ups
Key benefits of Stemphylium Botryosum (m10) IgE testing
- Helps identify whether mold sensitization may be contributing to your nasal or breathing symptoms.
- Supports distinguishing mold triggers from pollen, dust mite, and pet allergies when symptoms overlap.
- Adds objective data when your symptoms are seasonal, outdoor-related, or worse in damp conditions.
- Guides smarter follow-up testing by showing whether additional mold or inhalant allergens are worth checking.
- Helps you and your clinician align avoidance steps with your likely triggers instead of guessing.
- Provides a baseline you can compare over time if symptoms change or exposure patterns shift.
- Pairs well with PocketMD guidance so you can turn a lab value into practical next steps.
What is Stemphylium Botryosum (m10) IgE?
Stemphylium botryosum is a mold found in the environment, especially outdoors. The “m10” label refers to the standardized allergen extract used for testing.
The test measures allergen-specific immunoglobulin E (IgE), which is the antibody class most associated with immediate-type allergic reactions. If your immune system has become sensitized to Stemphylium botryosum, you may produce IgE that recognizes proteins from this mold.
A positive IgE result does not automatically mean you will feel symptoms every time you encounter mold. It means sensitization is present, and symptoms are more likely when exposure is high and your airways are already irritated (for example, during a heavy pollen season, viral illness, or uncontrolled asthma).
Sensitization vs. allergy symptoms
Sensitization means your immune system has made IgE to an allergen. Clinical allergy means you also have consistent symptoms with exposure. Your clinician will look for a match between your result and your real-world pattern, such as symptom timing, environment, and response to allergy medications.
How this differs from total IgE
Total IgE is a broad measure of IgE in your blood from many causes, including allergies, infections, and some inflammatory conditions. Allergen-specific IgE (like m10) is targeted and answers a narrower question: whether you have IgE that recognizes a particular allergen source.
What do my Stemphylium Botryosum (m10) IgE results mean?
Low or negative m10 IgE
A low or negative result makes Stemphylium botryosum sensitization less likely, but it does not rule out mold-related symptoms overall. You could still be sensitized to other molds, or your symptoms may be driven by non-allergic triggers such as irritant exposure, chronic sinus inflammation, reflux, or viral infections. If your history strongly suggests allergy, your clinician may recommend broader inhalant testing or skin testing.
In-range results (lab-specific)
For allergen-specific IgE, “in-range” typically means negative or below the lab’s sensitization threshold. In that case, your symptom plan usually focuses on other likely triggers and on controlling baseline airway inflammation. If you have ongoing symptoms, it can still be useful to test related allergens that match your exposure, such as other molds or regional pollen.
High or positive m10 IgE
A high or positive result suggests you are sensitized to Stemphylium botryosum. The higher the value (and the higher the class, if your report uses classes), the more likely it is that exposure could contribute to symptoms, but the number alone does not predict severity. Next steps often include checking for sensitization to other common molds and inhalants, and reviewing your symptom timing to see whether it tracks with outdoor mold seasons or damp conditions.
Factors that influence m10 IgE results
Your result can be influenced by the timing and intensity of exposure, since IgE patterns may shift over months and seasons. Cross-reactivity can also occur, meaning IgE that reacts to one mold may partially react to related mold proteins, which is why broader panels can be helpful. Medications like antihistamines generally do not suppress blood IgE results (unlike some skin tests), but immune-modifying therapies and certain medical conditions can affect immune markers. Lab methods and reporting thresholds vary, so it is best to compare results over time using the same lab when possible.
What’s included
- Stemphylium Botryosum (M10) Ige
Similar and related tests
Frequently Asked Questions
Do I need to fast for a Stemphylium botryosum (m10) IgE blood test?
Fasting is usually not required for allergen-specific IgE testing. If you are combining it with other labs (like lipids or glucose), follow the instructions for the full set of tests you ordered.
What does a positive m10 IgE mean?
A positive result means you are sensitized, which means your immune system has IgE that recognizes Stemphylium botryosum mold. Whether it is clinically important depends on whether your symptoms reliably occur with likely exposure and whether other allergens better explain your pattern.
Can antihistamines affect my mold IgE blood test result?
Antihistamines typically do not change allergen-specific IgE levels measured in blood. They can affect skin testing, which is one reason blood testing is sometimes chosen when you cannot stop antihistamines.
How is this different from a skin prick test for mold allergy?
A skin prick test measures an immediate skin reaction to allergen extracts, while this test measures IgE antibodies in your blood. Blood testing can be convenient when you have widespread eczema, cannot stop certain medications, or want a standardized numeric result to track over time.
If my m10 IgE is negative, can I still have mold-related symptoms?
Yes. You may react to other molds not covered by this specific test, or your symptoms may be irritant-driven rather than IgE-mediated allergy. If mold remains a concern, a broader inhalant/mold panel and a review of your home and workplace exposures can be more informative.
When should I retest allergen-specific IgE?
Retesting is usually considered when your symptoms change, your environment changes (moving, new job, new home moisture issues), or you and your clinician are tracking trends over time. Many people wait months rather than weeks, since IgE patterns typically shift gradually.