Wheat Dust-Specific IgE Antibody, Qualitative
A qualitative blood test that detects IgE antibodies to wheat dust, helping evaluate allergic sensitization to wheat dust.
["A detectable result suggests an allergic immune response to wheat dust, but it must be interpreted with symptoms and exposure history."]
Key facts at a glance
- LOINC
- 21604-4
- Short code
- Deprecated Wheat Dust IgE RAST Ql
- Synonyms
- Deprecated Wheat Dust 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 test looks for IgE antibodies directed against wheat dust in blood. IgE is one type of immune protein involved in allergic reactions.
Why might I need this test?
It may be ordered for people with sneezing, wheezing, nasal congestion, or other symptoms associated with exposure to grain or flour dust. Results can help identify whether wheat dust is a possible allergen trigger.
How is the test performed?
A blood sample is analyzed in a laboratory for antibodies specific to wheat dust. A qualitative result is generally reported as detectable or not detectable, often described as reactive or nonreactive.
How do I prepare for the test?
Fasting is usually not required. Tell your clinician about wheat or flour exposure, symptoms, medications, and any history of allergic reactions, because these details affect interpretation.
Reference range
Adult: 10-40 U/LN/A
No special preparation required. Avoid fatty meals before the test if possible.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
Detectable wheat dust-specific IgE may indicate immune sensitization to wheat dust. It does not by itself confirm symptomatic wheat-dust allergy or establish an allergy to wheat as a food. Clinical symptoms, timing of exposure, and other allergy evaluation are needed to determine its significance.
Short name
Wheat dust IgE
Frequently asked questions
Does a positive result mean I am allergic to wheat?
What symptoms can be related to wheat dust allergy?
Can this test distinguish food wheat allergy from wheat-dust allergy?
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 17, 2026. · Read our editorial policy