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Wheat rTri a 14-Specific IgE (RAST), Qualitative — Deprecated

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

A qualitative test for IgE antibodies to rTri a 14, a wheat protein. It can help assess possible wheat allergy sensitization.

Quick summary

["Detected rTri a 14-specific IgE suggests an immune response to this wheat protein, but symptoms and other findings are needed to diagnose allergy."]

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

Key facts at a glance

LOINC
81999-5
Short code
Deprecated Wheat (rTri a) 14 IgE RAST Ql
Synonyms
Deprecated Wheat (rTri a) 14 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 deprecated laboratory test looks for IgE antibodies directed against rTri a 14, a protein found in wheat. It is a component-specific allergy test rather than a general measurement of all wheat antibodies.

Why might I need this test?

It may be considered when a person has symptoms suggesting a wheat allergy, such as hives, swelling, wheezing, vomiting, or digestive discomfort after eating wheat. Results can help identify whether the immune system reacts specifically to this wheat protein.

How is the test performed?

A blood sample is analyzed for antibodies that bind to rTri a 14. Because this is a qualitative version of the test, the laboratory may report the antibodies as detected or not detected rather than providing a concentration.

How do I prepare for the test?

No special preparation is usually required. Follow any instructions from your healthcare professional and tell the laboratory if you are taking allergy medicines or have recently received biologic treatments, because these may affect the results.

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

Wheat rTri a 14 IgE

Frequently asked questions

Does a positive result mean I definitely have a wheat allergy?
No. It shows that specific IgE antibodies were detected, which can support possible wheat allergy. Your clinician should interpret the result alongside your symptoms and medical history.
Is this the same as testing for celiac disease?
No. This test evaluates an immediate IgE-mediated response to a wheat protein. Celiac disease is a different condition involving an immune reaction to gluten, and it requires separate testing.
Should I stop eating wheat because of a positive result?
Do not change your diet based only on this result. Discuss the findings with your clinician or allergist, especially if you have symptoms after eating wheat.
  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