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Canary Grass-Specific IgE, Serum

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

A blood test that measures IgE antibodies directed against canary grass, an allergen found in some grass pollens.

Quick summary

["A positive result suggests an allergic sensitization to canary grass but must be interpreted with symptoms and exposure history."]

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

Key facts at a glance

LOINC
102568-3
Short code
Canary grass IgE RAST
Synonyms
Canary grass IgE RAST
Category
tumor-marker
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
rast
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 IgE antibodies directed against canary grass. These antibodies are part of the immune response to a suspected allergen.

Why might I need this test?

Your clinician may order this test when you have sneezing, congestion, cough, wheezing, or other symptoms associated with exposure to grass pollen. It may help identify whether canary grass is a possible trigger.

How is the test performed?

A blood sample is collected by venipuncture and analyzed in a laboratory for allergen-specific IgE. Your clinician will interpret the result along with your symptoms, environment, and other allergy history.

How do I prepare for the test?

This test usually requires no special preparation. Tell your clinician about any medicines you take, particularly antihistamines or other allergy treatments, because they may affect interpretation.

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.

A positive result indicates immune sensitization to canary grass and may support a diagnosis of grass-pollen allergy. It does not by itself prove that canary grass is causing your symptoms. Results should be interpreted by a clinician in the context of your exposure history and symptoms.

Short name

Canary Grass-Specific IgE

Frequently asked questions

Does a positive result mean I am allergic to canary grass?
It indicates that your immune system has produced specific IgE antibodies to canary grass, which is consistent with sensitization. A clinician must determine whether this finding explains your symptoms.
Can this test diagnose hay fever?
No. Seasonal allergic rhinitis is diagnosed from symptoms and exposure patterns, and allergy testing can help identify possible triggers.
Should I stop taking allergy medicine before the test?
Do not stop prescribed or recommended medicines without guidance. Ask your clinician whether any medicines should be withheld, depending on the laboratory method and the purpose of testing.
  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