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Dermatophagoides microcerus Allergen-Specific IgE, Serum — RAST, Qualitative (Deprecated)

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

A blood test that looks for IgE antibodies to Dermatophagoides microcerus, a house dust mite, to assess allergic sensitization.

Quick summary

["Detectable allergen-specific IgE suggests an immune sensitization to D. microcerus, but this result must be considered with allergy symptoms and exposure history."]

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

Key facts at a glance

LOINC
15681-0
Short code
Deprecated D microceras IgE RAST Ql
Synonyms
Deprecated D microceras IgE RAST Ql
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
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 qualitative blood test checks for IgE antibodies directed against Dermatophagoides microcerus, a type of house dust mite. It is sometimes described as a radioallergosorbent test, or RAST, and is a type of allergen-specific IgE test.

Why might I need this test?

Your clinician may order it to evaluate possible dust mite allergy when you have symptoms such as sneezing, runny nose, itchy or watery eyes, wheezing, or worsening asthma. It may also help identify which allergens could be contributing to your symptoms.

How is the test performed?

A blood sample is drawn from a vein and analyzed in the laboratory for antibodies to the specified mite allergen. The result is reported as detectable or not detectable.

How do I prepare for the test?

No fasting or special preparation is usually required. Tell your clinician about any medicines or supplements you use, because treatment for allergies may affect how the result is interpreted.

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

D. microcerus-Specific IgE

Frequently asked questions

Does a positive result mean I am allergic to dust mites?
It shows that your immune system has produced IgE antibodies to D. microcerus. Your clinician will determine whether this finding meaningfully explains your symptoms.
Can I have a positive result without allergy symptoms?
Yes. Allergen-specific IgE can be detectable in people who do not currently have symptoms or may never develop a clinical reaction to that allergen.
Why is this test marked as deprecated?
The test has been designated as deprecated in the laboratory terminology database, which may mean that a newer testing method or equivalent test is preferred. Ask your clinician if an updated allergen-specific IgE assay is available.
  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