Serum Immunoglobulin G (IgG) Subclass Measurement (Dust Allergen Mix)
This test measures your body’s immune response to common dust allergens by checking levels of specific IgG antibodies. IgG is a type of antibody that helps your immune system fight infections and allergies.
["IgG antibodies help your body recognize and respond to allergens, including dust particles, which may affect your immune system over time."]
Key facts at a glance
- LOINC
- 56291-8
- Short code
- Dust Allerg Mix2 IgG4-mCnc
- Synonyms
- Dust Allerg Mix2 IgG4-mCnc
- Category
- coagulation
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 82784
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
What Does This Test Measure?
This test evaluates the concentration of IgG antibodies specific to a mix of common dust allergens. These allergens may include components found in household dust, such as mold, pet dander, or dust mites. The presence of these antibodies can indicate whether your immune system has been exposed to these allergens and is producing a response.
Why Might You Need This Test?
Your healthcare provider may order this test if you have symptoms like sneezing, itching, or allergic reactions that suggest exposure to dust allergens. It can also help assess immune function or diagnose conditions like allergies or immune-related disorders.
What to Expect Before the Test
No special preparation is needed for this test. You will provide a blood sample, typically drawn from a vein in your arm. The sample will be sent to a lab for analysis.
What the Results Mean
Results show the levels of IgG antibodies against dust allergens. Elevated levels may suggest an immune response to these allergens, while normal or low levels may indicate limited exposure or sensitivity. Your doctor will interpret these results in the context of your symptoms and medical history.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Clinical Significance: Understanding IgG Subclass Levels in Allergies
Short name
IgG Subclass Levels (Dust Allergen Mix)
Frequently asked questions
How long does it take to get results from this test?
Can I take anything before or after this blood test?
What if my results show abnormal IgG levels for dust allergens?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy