Ulocladium Chartartum (m204) IgE Biomarker Testing
It measures IgE sensitization to Ulocladium mold to support allergy evaluation, with convenient ordering and clear results through Vitals Vault/Quest.
With Vitals Vault, you have access to a comprehensive range of biomarker tests.
This test looks for allergen-specific IgE antibodies to Ulocladium chartarum (also reported as Ulocladium chartartum), a mold that can be found in damp indoor environments. A positive result suggests your immune system is sensitized to this mold, which can matter when you are trying to explain allergy-like symptoms.
Because mold exposure and symptoms do not always line up neatly, this is most useful when you pair it with your history, your home or workplace environment, and other allergy testing. The result can help you and your clinician decide whether to focus on mold avoidance, additional testing, or other causes of your symptoms.
Do I need a Ulocladium Chartartum M204 IgE test?
You might consider this test if you have recurring nasal congestion, sneezing, post-nasal drip, itchy or watery eyes, cough, or wheeze that seems worse in damp buildings, basements, bathrooms, or during times when indoor humidity is high. It can also be relevant if you have asthma that flares without a clear trigger, or if you are trying to sort out whether “allergies” are seasonal pollen-related versus more constant indoor exposures.
This test is also reasonable when you have already identified mold as a possible issue in your environment and you want objective data about sensitization. It does not prove that mold is present, and it does not prove that mold is the only cause of your symptoms, but it can strengthen or weaken the case that mold allergy belongs on your short list.
If you have had anaphylaxis, severe breathing symptoms, or rapidly worsening asthma, you should seek urgent medical care rather than relying on lab testing. For day-to-day symptom workups, testing is most helpful when it supports clinician-directed care and a practical plan you can follow.
This is a laboratory-developed, CLIA-validated allergen-specific IgE blood test; results support medical decision-making but do not diagnose disease on their own.
Lab testing
Ready to order Ulocladium (m204) IgE and schedule your draw?
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
You can order Ulocladium chartarum (m204) IgE through Vitals Vault and complete your blood draw at a participating Quest location. This is a straightforward way to check mold sensitization when you and your clinician are building an allergy or asthma picture and you want data you can track over time.
After your results post, you can use PocketMD to review what “sensitization” means, how IgE results are typically graded, and what follow-up questions to bring to your next visit. If your result suggests broader mold or indoor allergen sensitivity, you can also map out companion testing so you are not guessing.
If you are retesting, Vitals Vault makes it easier to repeat the same marker under similar conditions (same lab method and similar timing) so you can compare results more meaningfully.
- Order online and draw at Quest locations
- PocketMD guidance for next-step questions and context
- Easy retesting to track patterns over time
Key benefits of Ulocladium Chartartum M204 IgE testing
- Helps identify whether mold sensitization could be contributing to year-round allergy symptoms.
- Adds objective evidence when symptoms worsen in damp indoor environments or water-damaged buildings.
- Supports asthma trigger evaluation when cough, wheeze, or chest tightness flares without a clear cause.
- Helps you prioritize environmental steps (humidity control, remediation discussions) when clinically appropriate.
- Clarifies whether “mold exposure” concerns are more likely allergic sensitization versus non-allergic irritation.
- Pairs well with other specific IgE tests to map a broader indoor allergen profile (molds, dust mites, pets).
- Creates a baseline you can retest after major exposure changes or treatment adjustments to track trends.
What is Ulocladium Chartartum (m204) IgE?
Ulocladium chartarum is a type of mold that can grow on damp building materials and household surfaces. The “m204” label refers to a standardized allergen extract used by laboratories for testing.
This blood test measures allergen-specific immunoglobulin E (IgE) directed at Ulocladium. IgE is the antibody class involved in immediate-type allergic reactions. If you are sensitized, exposure can contribute to symptoms such as sneezing, congestion, itchy eyes, cough, or asthma flares.
A key point is that sensitization is not the same as symptoms. You can have detectable IgE and feel fine, and you can have symptoms from mold-related irritation or other triggers even if this specific IgE is negative. That is why interpretation works best when you consider your symptom pattern, exposures, and other allergy results together.
Sensitization vs. allergy symptoms
A positive m204 IgE result means your immune system recognizes Ulocladium and has made IgE antibodies to it. Whether that sensitization is clinically relevant depends on your exposure level and whether your symptoms line up with times and places where mold is likely present.
How this differs from mold testing in a building
This is a test of your immune response, not a test of your home. Environmental sampling can identify mold in a space, but it does not tell you whether your body is reacting to it. Your clinician may use both types of information, depending on your situation.
What do my Ulocladium Chartartum M204 IgE results mean?
Low or negative Ulocladium (m204) IgE
A low or negative result generally means sensitization to Ulocladium is unlikely, and it becomes a less likely explanation for your symptoms. It does not rule out other mold sensitivities, because different molds have different allergen proteins and you may react to other species. If your symptoms strongly track with damp environments, your clinician may still consider broader mold IgE testing, skin testing, or non-allergic causes such as irritant rhinitis.
In-range results (what “normal” usually means here)
For specific IgE tests, “normal” typically means the lab did not detect meaningful IgE to this allergen or detected it below a reporting threshold. In practical terms, that points you toward other triggers (pollens, dust mites, pets, infections, reflux, or non-allergic inflammation) when you are troubleshooting symptoms. Your clinician may interpret a borderline value cautiously, especially if you have strong exposure history and multiple other positive indoor allergens.
High Ulocladium (m204) IgE
A higher result suggests you are sensitized to Ulocladium and that exposure could be contributing to allergic rhinitis or asthma symptoms. The number does not perfectly predict how severe your symptoms will be, but higher classes or higher concentrations often increase the likelihood that the sensitization is clinically relevant. Next steps commonly include reviewing your exposure pattern, testing for other indoor molds and allergens, and discussing symptom control strategies with your clinician.
Factors that influence Ulocladium IgE results
Your overall “atopic” tendency matters: people with eczema, allergic rhinitis, or asthma often have more positive specific IgE results across multiple allergens. Cross-reactivity can occur, meaning IgE that reacts to one mold may partially react to related mold proteins, which can complicate pinpointing a single culprit. Timing and treatment can also affect interpretation—specific IgE is generally stable, but major exposure changes, immunotherapy, or shifts in immune status can change results over months. Finally, a positive blood test does not confirm current exposure, so environmental context still matters.
What’s included
- Ulocladium Chartarum (M204) Ige
Frequently Asked Questions
Do I need to fast for a Ulocladium (m204) IgE blood test?
Fasting is not typically required for allergen-specific IgE testing. If you are getting other labs at the same visit (like lipids or glucose-related tests), follow the fasting instructions for those tests.
What does a positive Ulocladium IgE mean?
A positive result means you are sensitized, meaning your immune system has made IgE antibodies that recognize Ulocladium mold. It suggests exposure could contribute to symptoms, but it does not prove that mold is present in your environment or that it is the only cause of your symptoms.
Can I have mold symptoms with a negative Ulocladium IgE?
Yes. Your symptoms could be driven by other molds, other allergens (dust mites, pets, pollens), infections, reflux, or non-allergic irritation from damp air and volatile compounds. A negative result mainly makes Ulocladium-specific allergy less likely.
Is this the same as a “mold toxicity” test?
No. This test measures allergic sensitization (IgE) to a specific mold allergen. It does not measure mycotoxins, and it does not diagnose chronic inflammatory or toxic exposure syndromes.
How is blood IgE testing different from skin prick testing?
Both assess allergic sensitization, but they do it differently. Blood testing measures circulating IgE antibodies, while skin testing measures an immediate skin response to allergen extracts. Your clinician may prefer one approach based on medications you take, skin conditions, risk considerations, and which allergens need to be assessed.
When should I retest Ulocladium IgE?
Retesting is usually most useful after a meaningful change, such as moving, completing remediation, changing workplace exposure, or after a period of treatment planning with your clinician. Because IgE changes slowly, retesting is often done months later rather than weeks later unless your clinician has a specific reason.