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25675 Allergen, Mushroom, IgE (MUSH)

Allergen, Mushroom, IgE (MUSH)
Test Code: ALMSHSO
Synonyms/Keywords
​Agaricus bisporus, Agaricus hortensis, Buttom Mushroom, Champignon, Common Mushroom, Cultivated Mushroom, Table Mushroom, White Mushroom,
Useful For

Establishing the diagnosis of an allergy to mushroom

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 each 5 allergens requested 0.3 mL
Collection Processing Instructions

For 1 allergen: 0.3 mL
For more than 1 allergen: (0.05 mL x number of allergens) + 0.25 mL deadspace

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 measureable levels of IgE antibodies in serum, and results must be interpreted in the clinical context.

False-positive resuts for IgE antibodies may occur in patients with markedly elevated serum IgE (.2,500 kU/L) due to nonspecific binding to allergen solid phases.

Performing Laboratory Information
Performing Location Day(s) Test Performed Report Available Methodology/Instrumentation
​Mayo Clinic Laboratories ​Monday through Friday 1 to 3 days ​Fluorescence Enzyme Immunoassay (FEIA)
Reference Lab
Reference Range Information
Performing Location Reference Range
​Mayo Clinic Laboratories
Class
IgE kU/L
Interpretation
0
<0.35
Negative
1
0.35-0.69
Equivocal
2
0.70-3.49
Positive
3
3.50-17.4
Positive
4
17.5-49.9
Strongly positive
5
50.0-99.9
Strongly positive
6
> or =100
Strongly 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
CPT Modifier
(if needed)
Quantity Description Comments
​86003 ​1
Classification
Synonyms/Keywords
​Agaricus bisporus, Agaricus hortensis, Buttom Mushroom, Champignon, Common Mushroom, Cultivated Mushroom, Table Mushroom, White Mushroom,
Ordering Applications
Ordering Application Description
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 each 5 allergens requested 0.3 mL
Collection Processing

For 1 allergen: 0.3 mL
For more than 1 allergen: (0.05 mL x number of allergens) + 0.25 mL deadspace

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 measureable levels of IgE antibodies in serum, and results must be interpreted in the clinical context.

False-positive resuts for IgE antibodies may occur in patients with markedly elevated serum IgE (.2,500 kU/L) due to nonspecific binding to allergen solid phases.

Useful For

Establishing the diagnosis of an allergy to mushroom

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.

Reference Range Information
Performing Location Reference Range
​Mayo Clinic Laboratories
Class
IgE kU/L
Interpretation
0
<0.35
Negative
1
0.35-0.69
Equivocal
2
0.70-3.49
Positive
3
3.50-17.4
Positive
4
17.5-49.9
Strongly positive
5
50.0-99.9
Strongly positive
6
> or =100
Strongly 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 Location Day(s) Test Performed Report Available Methodology/Instrumentation
​Mayo Clinic Laboratories ​Monday through Friday 1 to 3 days ​Fluorescence Enzyme Immunoassay (FEIA)
Reference Lab
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)
Quantity Description Comments
​86003 ​1
Classification
For most current information refer to the Marshfield Laboratory online reference manual.