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26247 Allergen, Lamb, IgE Serum (LAMB)

Allergen, Lamb, IgE Serum (LAMB)
Test Code: ALLAMSO
Synonyms/Keywords

​Mutton (Ovis Spp.)

Useful For

Establishing a diagnosis of an allergy to lamb               

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

Specimen Requirements
Specimen TypePreferred Container/TubeAcceptable Container/TubeSpecimen VolumeSpecimen Minimum Volume
(allows for 1 repeat)
Pediatric Minimum Volume
(no repeat)
​Serum​Red Top Tube (RTT)​Serum Separator Tube (SST)​0.5 mL for every 5 allergens requested​For 1 allergen: 0.3 mL
For more than 1 allergen: (0.05 mL x number of allergens) + 0.25 mL deadspace
Acceptable Specimen Types

​Serum

Specimen Stability Information
Specimen TypeTemperatureTime
​Serum ​​Refrigerated (preferred)​14 days
​Frozen ​90 days
Interference

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.

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

Performing Laboratory Information
Performing LocationDay(s) Test PerformedAnalytical TimeMethodology/Instrumentation
​Mayo Clinic Laboratories​Monday - 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

​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
CPTModifier
(if needed)
QuantityDescriptionComments
​86003​1
Synonyms/Keywords

​Mutton (Ovis Spp.)

Ordering Applications
Ordering ApplicationDescription
​COM​Allergen, Lamb IgE
​Cerner​Allergen, Lamb IgE (LAMB)
​Centricity​​Allergen, Lamb IgE (LAMB)
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Specimen TypePreferred Container/TubeAcceptable Container/TubeSpecimen VolumeSpecimen Minimum Volume
(allows for 1 repeat)
Pediatric Minimum Volume
(no repeat)
​Serum​Red Top Tube (RTT)​Serum Separator Tube (SST)​0.5 mL for every 5 allergens requested​For 1 allergen: 0.3 mL
For more than 1 allergen: (0.05 mL x number of allergens) + 0.25 mL deadspace
Acceptable Specimen Types

​Serum

Specimen Stability Information
Specimen TypeTemperatureTime
​Serum ​​Refrigerated (preferred)​14 days
​Frozen ​90 days
Interference

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.

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

Useful For

Establishing a diagnosis of an allergy to lamb               

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

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

​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 LocationDay(s) Test PerformedAnalytical TimeMethodology/Instrumentation
​Mayo Clinic Laboratories​Monday - Saturday​Same day/1 day​Fluorescence Enzyme Immunoassay (FEIA)
Reference Lab
For billing questions, see Contacts
Outreach CPTs
CPTModifier
(if needed)
QuantityDescriptionComments
​86003​1
For most current information refer to the Marshfield Laboratory online reference manual.