Glycyphagus Domesticus (D73) IgE Biomarker Testing
It measures IgE sensitization to Glycyphagus domesticus (storage mite) to help explain allergy symptoms, with easy ordering and Quest lab access via Vitals Vault.
With Vitals Vault, you have access to a comprehensive range of biomarker tests.
This test measures allergen-specific IgE antibodies to Glycyphagus domesticus (also called a storage mite), labeled as allergen component D73 on many lab reports. A positive result suggests your immune system is sensitized to this mite and may react when you are exposed.
Storage mites are commonly found in stored grains, animal feed, hay, and other dusty organic materials. If your symptoms flare in barns, feed rooms, grain storage areas, or even in dusty indoor environments, this test can help connect the pattern.
Your result is one piece of the allergy puzzle. It supports clinician-directed care and exposure planning, but it does not diagnose an allergy by itself or predict exactly how severe a reaction will be.
Do I need a Glycyphagus Domesticus D73 IgE test?
You may consider this test if you have allergy-type symptoms that come and go with certain environments, especially sneezing, runny or stuffy nose, itchy/watery eyes, cough, wheeze, chest tightness, or eczema flares. It can be particularly relevant if symptoms worsen around stored grain, hay, animal feed, barns, stables, or other dusty organic materials where storage mites can thrive.
This test is also useful when you have “dust allergy” symptoms but your history does not fit classic house dust mite exposure, or when you want to clarify which specific allergens are driving symptoms before making changes at home or work. If you have asthma, identifying triggers like mites can help you and your clinician reduce flare-ups.
You might not need a single-allergen test if your symptoms are broad or unclear. In that case, a broader inhalant allergy panel can be a more efficient starting point, with targeted add-ons based on what it finds.
This is a CLIA-certified laboratory blood test for allergen-specific IgE; results should be interpreted with your symptoms and exposure history and are not a standalone diagnosis.
Lab testing
Order Glycyphagus Domesticus (D73) IgE and schedule your blood 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
Vitals Vault lets you order allergen-specific IgE testing without a referral, then complete your blood draw through a national lab network. If you are trying to understand whether a storage mite could be contributing to rhinitis, asthma symptoms, or eczema, this test can give you a concrete data point to discuss with your clinician.
After results post, you can use PocketMD to review what “sensitization” means, how to think about exposure sources, and which companion tests may help (for example, other mite or grass allergens if your symptoms are seasonal). If you are tracking symptoms over time, you can also retest in a structured way after meaningful exposure changes.
If you are not sure whether to order a single allergen or a broader panel, PocketMD can help you map your symptoms and environment to the most practical next step before you check out.
- Order online and schedule a local blood draw
- PocketMD guidance for next steps and retest timing
- Results you can share with your clinician or allergist
Key benefits of Glycyphagus Domesticus D73 IgE testing
- Helps identify sensitization to a storage mite that can be missed when you only think about “house dust.”
- Supports linking symptoms to specific environments such as barns, feed rooms, hay, or stored grains.
- Adds clarity when you have year-round nasal or eye symptoms but an unclear trigger pattern.
- Can guide targeted exposure reduction steps instead of broad, disruptive changes.
- Provides a baseline you can compare if symptoms change after moving, changing work conditions, or improving dust control.
- Helps your clinician decide whether broader inhalant testing or additional mite allergens are worth adding.
- Creates a clean, shareable lab datapoint you can review in PocketMD alongside your symptom timeline.
What is Glycyphagus Domesticus D73 IgE?
Glycyphagus domesticus is a type of storage mite. Unlike the more familiar house dust mites that live in bedding and carpets, storage mites tend to thrive in stored organic materials such as grain, flour, hay, and animal feed. People who work with these materials (or who keep them at home) can have meaningful exposure even if their home looks “clean.”
The test measures allergen-specific immunoglobulin E (IgE) in your blood directed against Glycyphagus domesticus (often labeled D73). IgE is the antibody class involved in immediate-type allergic reactions. When you are sensitized, exposure can trigger immune signaling that leads to symptoms like sneezing, congestion, itchy eyes, cough, wheeze, or skin flares.
A key point is that IgE sensitization is not the same as proven clinical allergy. Some people have detectable IgE but minimal symptoms, while others have strong symptoms with modest IgE levels. Your history, seasonality, and exposure patterns are what turn a number into an actionable plan.
How this differs from “dust mite” testing
Many people associate mite allergy with Dermatophagoides species (common house dust mites). Storage mites are a different group, and sensitization can occur in people with agricultural, animal, or grain-related exposures. There can also be cross-reactivity between mite allergens, which is one reason your clinician may interpret this result alongside other mite IgE tests.
What the result can and cannot tell you
This test can support that your immune system recognizes this allergen and may react when exposed. It cannot confirm the exact exposure source, predict reaction severity, or replace a full allergy evaluation when symptoms are significant or asthma is poorly controlled.
What do my Glycyphagus Domesticus D73 IgE results mean?
Low or undetectable Glycyphagus Domesticus (D73) IgE
A low or negative result means the lab did not detect meaningful IgE sensitization to Glycyphagus domesticus at the time of testing. If you still have strong symptoms, it may point you toward other triggers such as common house dust mites, animal dander, molds, pollens, or non-allergic rhinitis. Timing and exposure intensity matter, so a negative test does not automatically rule out environmental irritation or other immune pathways.
In-range / expected result
For allergen-specific IgE, “optimal” usually means your result is low enough that sensitization is unlikely, or it falls into a borderline range that needs symptom-based interpretation. If your symptoms are mild and inconsistent, a low-to-borderline result may not be clinically important. If your symptoms clearly track with high-risk environments (like grain or feed dust), your clinician may still consider broader testing or a targeted exposure trial.
High Glycyphagus Domesticus (D73) IgE
A higher result suggests sensitization to this storage mite and increases the likelihood that exposure contributes to your symptoms. It does not prove that every symptom you have is from this allergen, and it does not predict exactly how severe reactions will be. The most useful next step is to pair the result with your exposure history and consider whether symptom control improves with practical dust and storage-mite reduction measures.
Factors that influence Glycyphagus Domesticus (D73) IgE
Your result can be influenced by how much exposure you have (workplace, hobbies, home storage), the presence of other allergic diseases (asthma, eczema, allergic rhinitis), and cross-reactivity with other mites. Recent changes in environment, seasonal shifts in humidity, and dust control measures can change exposure levels over time. Medications like antihistamines generally do not suppress IgE blood test results, but immune-modifying therapies and major health changes can affect immune markers, so it is worth reviewing your medication list with your clinician when interpreting results.
What’s included
- Glycyphagus Domesticus (D73) Ige
Frequently Asked Questions
What is Glycyphagus domesticus (D73)?
Glycyphagus domesticus is a storage mite found in stored organic materials like grain, hay, and animal feed. “D73” is the lab code commonly used for the allergen-specific IgE test to this mite.
Do I need to fast for a Glycyphagus Domesticus IgE blood test?
Fasting is not typically required for allergen-specific IgE testing. If you are combining it with other labs that do require fasting, follow the instructions for the full order.
Can antihistamines affect IgE blood test results?
Antihistamines usually do not change allergen-specific IgE levels in blood, so they generally do not affect this test the way they can affect skin testing. Still, review all medications with your clinician if results do not match your symptoms.
Is a positive D73 IgE the same as having an allergy?
A positive result indicates sensitization, meaning your immune system has IgE that recognizes the allergen. Whether that sensitization causes real-world symptoms depends on your exposure and clinical history, so interpretation should include your symptom pattern.
What should I do if my Glycyphagus domesticus IgE is high?
Use the result to look for likely exposure sources (stored grain, hay, animal feed, dusty storage areas) and discuss targeted exposure reduction with your clinician. If you have asthma symptoms, prioritize good control and consider broader inhalant testing to see whether other allergens are also contributing.
When should I retest allergen-specific IgE?
Retesting is most useful after a meaningful change, such as moving, changing work exposure, or implementing sustained dust control, and usually not sooner than several months. Your clinician can help decide whether retesting will change management, since symptoms and exposure often matter more than small numeric shifts.