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Dust Allergen Mix 2-Specific IgE Antibody, Serum

Published: August 9, 2026Updated: August 17, 2026

Measures IgE antibodies to a mixture of dust allergens to help evaluate possible allergic sensitization to household dust.

Quick summary

["A positive result suggests allergy sensitization to one or more allergens in the tested dust mixture, but it must be interpreted with symptoms and medical history."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
24506-8
Short code
Dust Allerg Mix2 IgE RAST
Synonyms
Dust Allerg Mix2 IgE RAST
Category
liver
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
10
Ref high
40
Critical range
— – 500 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
multidisk
CPT
84484
SNOMED
302774002
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 is this test?

This blood test measures allergen-specific IgE antibodies against a laboratory-prepared mixture of dust allergens. The exact allergens included can vary by laboratory, so the test panel should be reviewed with your healthcare professional.

Why might I need this test?

This test may be ordered if you have sneezing, congestion, wheezing, or other symptoms suggesting a dust allergy. It can help identify whether your symptoms are related to sensitization to common household dust allergens.

How is the test performed?

A blood sample is collected and tested in a laboratory for IgE antibodies to the allergens in the mixture. It is usually an immunoassay and does not require a skin-prick test.

How do I prepare for the test?

Fasting is generally not required. Tell your clinician about any antihistamines or other allergy medicines you are taking, because they may affect interpretation; do not stop prescribed medication without medical advice.

Reference range

Adult: 10-40 U/LN/A

Specimen: serum

No special preparation required. Avoid fatty meals before the test if possible.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Dust allergen mix 2 IgE antibody

Frequently asked questions

Does a positive result mean I am allergic to dust?
It indicates that your immune system has produced IgE antibodies to at least one tested dust allergen. A clinician should interpret the result with your symptoms because sensitization does not always mean clinically significant allergy.
What allergens are included in a dust allergen mix 2?
The components can vary by laboratory or manufacturer, commonly including selected house dust mite allergens. Check with the testing laboratory for the specific allergens included.
Can allergy medicines affect the result?
Some antihistamines can reduce IgE test results or make them harder to interpret. Inform your clinician of all medicines and supplements before testing, and follow their instructions before withholding any medication.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

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.

Medical Disclaimer

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 17, 2026. · Read our editorial policy