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25669 Allergen, Crayfish, IgE (CRAY)

Allergen, Crayfish, IgE  (CRAY)
Test Code: ALCRYSO
Synonyms/Keywords
​Astacus astacus, Crawfish, Fish, crayfish
Useful For
​Testing for IgE antibodies may be useful to establish the diagnosis of an allergic disease and to define the allergens responsible for eliciting signs and symptoms.
 
Testing also may be useful to identify allergens which may be responsible for allergic disease and/or anaphylactic episode, to confirm sensitization to particular allergens prior to beginning immunotherapy, and to investigate the specificity of allergic reactions to insect venom allergens, drugs, or chemical allergens.
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
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
​Mayo Medical Laboratories ​Monday through Friday ​Same day/1 day ​Fluorescence Enzyme Immunoassay (FEIA)
Reference Lab
Mayo Clinic Laboratories
Reference Range Information
Performing Location Reference Range
Mayo Medical 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 ​ ​ ​ ​
Synonyms/Keywords
​Astacus astacus, Crawfish, Fish, crayfish
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 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
Useful For
​Testing for IgE antibodies may be useful to establish the diagnosis of an allergic disease and to define the allergens responsible for eliciting signs and symptoms.
 
Testing also may be useful to identify allergens which may be responsible for allergic disease and/or anaphylactic episode, to confirm sensitization to particular allergens prior to beginning immunotherapy, and to investigate the specificity of allergic reactions to insect venom allergens, drugs, or chemical allergens.
Reference Range Information
Performing Location Reference Range
Mayo Medical 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 Analytical Time Methodology/Instrumentation
​Mayo Medical Laboratories ​Monday through Friday ​Same day/1 day ​Fluorescence Enzyme Immunoassay (FEIA)
Reference Lab
Mayo Clinic Laboratories
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.