Skip Ribbon Commands
Skip to main content
Sign In

23240 Allergen, Grass Panel 1 (GRAS1)

Allergen, Grass Panel 1 (GRAS1)
Test Code: ALGRASO
Synonyms/Keywords
IgE Antibodies, Multi-Allergen, Includes: June/Kentucky Blue, Meadow Fescue, Orchard, Rye, Timothy
Test Components
​Includes: June/Kentucky Blue, Meadow Fescue, Orchard, Rye, Timothy
Useful For

Establishing a diagnosis of an allergy to June/Kentucky blue, meadow fescue, orchard, rye, and timothy

Defining the allergen responsible for eliciting signs and symptoms

Identifying allergens:

-Responsible for allergic disease and/or anaphylactic episode

-To confirm sensitization prior to beginning immunotherapy

-To investigate the specificity of allergic reactions to insect venom allergens, drugs, or chemical allergens

Testing for IgE antibodies is not useful in patients previously treated with immunotherapy to determine if residual clinical sensitivity exists, or in patients in whom the medical management does not depend upon identification of allergen specificity. 

Specimen Requirements
Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)
Pediatric Minimum Volume
(no repeat)
Serum​ ​Red Top Tube (RTT) Serum Separator Tube (SST)​ 0.5 mL​
For 1 allergen: 0.3 mL/For more than 1 allergen: 0.05 mL x number of allergens + 0.25 mL dead space​
Specimen Stability Information
Specimen Type Temperature Time
Serum​ ​ Refrigerated (preferred)​ 14 days​
Frozen ​ 90 days​
Interference

​Some individuals with clinically insignificant sensitivity to allergens may have measurable levels of IgE antibodies in serum, and results must be interpreted in the clinical context.

False-positive results for IgE antibodies may occur in patients with markedly elevated serum IgE (>2500 kU/L) due to nonspecific binding to allergen solid phases.

Since only one result is generated for this panel, individual (single) allergen responses cannot be identified. When this panel is positive, follow-up testing is required to differentiate between individual allergens in the panel. 

Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Mayo Clinic Laboratories
Monday through Saturday​
Same day/1 day​
Fluorescence Enzyme Immunoassay (FEIA)​
Reference Lab
Reference Range Information
ClassIgE kU/LInterpretation
0<0.35Negative
10.35-0.69Equivocal
20.70-3.49Positive
33.50-17.4Positive
417.5-49.9Strongly positive
550.0-99.9Strongly positive
6> or =100Strongly positive

Reference values apply to all ages.

Interpretation

Positive results indicate the possibility of allergic disease induced by one or more allergens present in the multi-allergen cap.

Negative results may rule out allergy, except in rare cases of allergic disease induced by exposure to a single allergen.

Detection of IgE antibodies in serum (Class 1 or greater) indicates an increased likelihood of allergic disease as opposed to other etiologies and defines the allergens that may be responsible for eliciting signs and symptoms.

The level of IgE antibodies in serum varies directly with the concentration of IgE antibodies expressed as a class score or kU/L.

Outreach CPTs
CPT Modifier
(if needed)
Quantity Description Comments
86003​
Synonyms/Keywords
IgE Antibodies, Multi-Allergen, Includes: June/Kentucky Blue, Meadow Fescue, Orchard, Rye, Timothy
Test Components
​Includes: June/Kentucky Blue, Meadow Fescue, Orchard, Rye, Timothy
Ordering Applications
Ordering Application Description
​Centricity ​Allergen, Grass Panel 1 (81706)
​Cerner ​Allergen, Grass Pnl 1 (81706)
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)
Pediatric Minimum Volume
(no repeat)
Serum​ ​Red Top Tube (RTT) Serum Separator Tube (SST)​ 0.5 mL​
For 1 allergen: 0.3 mL/For more than 1 allergen: 0.05 mL x number of allergens + 0.25 mL dead space​
Specimen Stability Information
Specimen Type Temperature Time
Serum​ ​ Refrigerated (preferred)​ 14 days​
Frozen ​ 90 days​
Interference

​Some individuals with clinically insignificant sensitivity to allergens may have measurable levels of IgE antibodies in serum, and results must be interpreted in the clinical context.

False-positive results for IgE antibodies may occur in patients with markedly elevated serum IgE (>2500 kU/L) due to nonspecific binding to allergen solid phases.

Since only one result is generated for this panel, individual (single) allergen responses cannot be identified. When this panel is positive, follow-up testing is required to differentiate between individual allergens in the panel. 

Useful For

Establishing a diagnosis of an allergy to June/Kentucky blue, meadow fescue, orchard, rye, and timothy

Defining the allergen responsible for eliciting signs and symptoms

Identifying allergens:

-Responsible for allergic disease and/or anaphylactic episode

-To confirm sensitization prior to beginning immunotherapy

-To investigate the specificity of allergic reactions to insect venom allergens, drugs, or chemical allergens

Testing for IgE antibodies is not useful in patients previously treated with immunotherapy to determine if residual clinical sensitivity exists, or in patients in whom the medical management does not depend upon identification of allergen specificity. 

Test Components
​Includes: June/Kentucky Blue, Meadow Fescue, Orchard, Rye, Timothy
Reference Range Information
ClassIgE kU/LInterpretation
0<0.35Negative
10.35-0.69Equivocal
20.70-3.49Positive
33.50-17.4Positive
417.5-49.9Strongly positive
550.0-99.9Strongly positive
6> or =100Strongly positive

Reference values apply to all ages.

Interpretation

Positive results indicate the possibility of allergic disease induced by one or more allergens present in the multi-allergen cap.

Negative results may rule out allergy, except in rare cases of allergic disease induced by exposure to a single allergen.

Detection of IgE antibodies in serum (Class 1 or greater) indicates an increased likelihood of allergic disease as opposed to other etiologies and defines the allergens that may be responsible for eliciting signs and symptoms.

The level of IgE antibodies in serum varies directly with the concentration of IgE antibodies expressed as a class score or kU/L.

For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Mayo Clinic Laboratories
Monday through Saturday​
Same day/1 day​
Fluorescence Enzyme Immunoassay (FEIA)​
Reference Lab
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)
Quantity Description Comments
86003​
For most current information refer to the Marshfield Laboratory online reference manual.