Aureobasidium Pullulans M12 IgG Biomarker Testing
It measures IgG antibodies to Aureobasidium pullulans; results may guide a cautious elimination trial, with Quest lab ordering and PocketMD context.
With Vitals Vault, you have access to a comprehensive range of biomarker tests.
This test measures your IgG antibodies to Aureobasidium pullulans (often listed as “M12”), a common environmental yeast-like fungus found in soil, plants, and damp indoor areas.
An IgG result is not the same thing as an allergy test. It is best used as a clue about immune exposure and pattern-finding, especially if you are trying to connect recurring symptoms with diet, environment, or a structured elimination-and-rechallenge plan.
If you already feel worn down by restrictive diets or confusing “positive” IgG reports, you are not alone. The most useful next step is usually not cutting everything out at once, but choosing a small, time-limited experiment and tracking symptoms in a consistent way.
Do I need a Aureobasidium Pullulans M12 IgG test?
You might consider this test if you are trying to make sense of recurring symptoms that seem to flare with certain foods, environments, or seasons, but you do not have clear, immediate “allergy-type” reactions. People often look at IgG testing when symptoms are delayed or nonspecific, such as bloating, changes in stool patterns, headaches, skin flares, or “brain fog.”
This marker can also be relevant if you suspect mold or damp-building exposure and you want another data point to discuss with a clinician. Aureobasidium pullulans is widespread in nature and can show up indoors, so the goal is usually to understand whether your immune system shows evidence of exposure—not to prove a diagnosis from a single number.
You may not need this test if you have rapid-onset hives, wheezing, lip/tongue swelling, or anaphylaxis after a specific food or exposure. Those scenarios call for IgE-based allergy evaluation and clinician-guided safety planning.
Your result is most helpful when it is interpreted alongside your symptoms, timing, and other labs. Testing can support clinician-directed care and a measured plan, but it is not a standalone diagnosis.
This is a laboratory-developed immunoassay performed in a CLIA-certified lab; it can inform patterns of immune response but does not diagnose allergy, infection, or mold illness by itself.
Lab testing
Order Aureobasidium Pullulans M12 IgG through Vitals Vault and schedule your blood draw when it fits your week.
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
With Vitals Vault, you can order Aureobasidium Pullulans M12 IgG directly and complete your blood draw through a national lab network. Your results are delivered in a clear format so you can focus on what to do next, not just what the number says.
If your result raises questions—like whether you should change your diet, investigate environmental exposure, or confirm true allergy risk—PocketMD can help you put the finding in context. You can use it to review what IgG does and does not mean, build a sensible symptom journal, and decide whether follow-up IgE testing is appropriate.
If you are running an elimination-and-rechallenge trial, Vitals Vault also makes it easier to retest on a timeline that matches your plan, so you can track trends rather than overreact to a single snapshot.
- Order online and schedule a local blood draw
- Results you can revisit and trend over time
- PocketMD support for practical next steps
Key benefits of Aureobasidium Pullulans M12 IgG testing
- Adds an objective data point about immune exposure to Aureobasidium pullulans.
- Helps you separate “possible pattern” signals from guesswork when symptoms are delayed.
- Supports a more targeted, time-limited elimination and rechallenge plan instead of broad restriction.
- Can guide whether you should look more closely at damp indoor environments or visible mold sources.
- Provides context to discuss with a clinician when symptoms persist despite basic diet changes.
- Helps you decide when IgE allergy testing is the safer next step for immediate-type reactions.
- Makes it easier to track trends with repeat testing when you change exposures or diet.
What is Aureobasidium Pullulans M12 IgG?
Aureobasidium pullulans is a common fungus found outdoors (soil, plants, wood) and sometimes indoors, especially in damp areas. “M12” is a lab designation used to identify the specific antigen preparation used for testing.
IgG (immunoglobulin G) is an antibody your immune system makes after exposure to many things you breathe in or eat. An IgG result can reflect exposure and immune recognition, and in some people it may correlate with symptom patterns. However, IgG is not the antibody class that drives classic immediate allergy reactions (those are typically IgE-mediated).
Because of that, an elevated Aureobasidium pullulans IgG level should be treated as a clue, not a verdict. The most practical use is to combine the result with your history—what symptoms you have, how quickly they show up, and what changes when you reduce or reintroduce a suspected trigger.
IgG vs IgE: why the difference matters
IgE is associated with immediate hypersensitivity reactions such as hives, swelling, wheeze, or anaphylaxis. IgG is more often a marker of exposure and immune memory, and it can be present even when you tolerate an exposure well. If your symptoms are rapid and severe, IgE-focused evaluation is the priority for safety.
What this test can and can’t answer
This test can suggest that your immune system has recognized Aureobasidium pullulans. It cannot confirm that this fungus is the cause of your symptoms, cannot diagnose a mold-related illness, and cannot replace a clinical evaluation of asthma, allergic rhinitis, eczema, or gastrointestinal disease.
What do my Aureobasidium Pullulans M12 IgG results mean?
Low Aureobasidium Pullulans M12 IgG
A low result generally means your immune system is not showing measurable IgG recognition to this antigen at the time of testing. That can happen if you have minimal exposure, if your exposure was remote in time, or if your immune response simply does not produce a strong IgG signal for this target. If your symptoms strongly suggest an immediate allergy pattern, a low IgG does not rule out IgE-mediated allergy.
In-range (reference-range) Aureobasidium Pullulans M12 IgG
An in-range result usually indicates no significant elevation compared with the lab’s reference population. For many people, that makes Aureobasidium pullulans a less likely driver of their symptom pattern, especially if other exposures or foods show clearer signals. If you are doing an elimination trial, an in-range result may help you avoid unnecessary restriction and focus on higher-yield targets.
High Aureobasidium Pullulans M12 IgG
A high result means you have a stronger IgG antibody signal to Aureobasidium pullulans than the reference range. This can reflect higher exposure (for example, damp indoor environments or frequent contact with outdoor sources) and/or a more reactive immune recognition. It does not prove that this fungus is causing symptoms, but it can justify a careful next step such as improving moisture control at home, tightening symptom tracking, or running a structured elimination-and-rechallenge rather than making permanent, broad diet changes.
Factors that influence Aureobasidium Pullulans M12 IgG
Recent or ongoing exposure can raise IgG levels, while reduced exposure over time may allow levels to drift down. Immune-modulating medications, significant immune suppression, and some chronic illnesses can affect antibody production and may blunt results. Cross-reactivity can also occur because fungal antigens can share similar proteins, so a “high” result may sometimes reflect broader fungal exposure rather than a single organism. Finally, different labs and methods use different reference ranges, so your interpretation should be tied to the report’s units and cutoffs.
What’s included
- Aureobasidium Pullulans (M12) Igg
Frequently Asked Questions
Is Aureobasidium Pullulans M12 IgG a mold allergy test?
Not exactly. This is an IgG antibody test, which is different from IgE allergy testing. IgE is the antibody type most associated with immediate allergic reactions, while IgG more often reflects exposure and immune recognition. If you have rapid symptoms like hives, wheeze, or swelling, ask about IgE-based testing and clinical evaluation.
Do I need to fast before an Aureobasidium pullulans IgG blood test?
Fasting is usually not required for an IgG antibody test. If you are ordering it alongside other labs (like lipids or glucose/insulin markers), those may require fasting, so follow the instructions for your full order.
Can a high IgG result explain bloating, headaches, or skin flares?
A high IgG result can be a clue, but it cannot confirm cause and effect. The most reliable way to test whether it matters for you is a structured plan: track baseline symptoms, reduce a suspected exposure for a defined period, and then reintroduce it while continuing the same tracking. If symptoms are severe or you have red flags (weight loss, blood in stool, breathing issues), get medical evaluation rather than relying on IgG results.
What should I do if my result is high?
Start with context. Review whether your symptoms match the timing you would expect from an exposure-related pattern, and consider environmental basics like moisture control and visible mold remediation if relevant. If you are considering diet changes, choose a narrow, time-limited elimination with a planned rechallenge instead of removing many foods indefinitely. PocketMD can help you map out a conservative plan and decide if IgE testing is warranted.
Can a low or normal IgG result rule out mold exposure?
No. A low or in-range IgG result does not rule out exposure, and it does not rule out other immune pathways or non-immune causes of symptoms. It simply means this specific IgG signal was not elevated on this test under the lab’s conditions.
How is this different from IgG4 testing (like wheat IgG4)?
Total IgG and IgG4 are related but not identical measures. IgG4 is a subclass of IgG that can behave differently in the immune system and is sometimes reported separately for certain foods. The practical takeaway is the same: neither IgG nor IgG4 alone diagnoses allergy, and both are best used as pattern clues paired with symptoms and a careful trial rather than permanent restriction.