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Test Code CATPF Cat Epithelium, IgE, with Reflex to Cat Epithelium Components, IgE, Serum


Ordering Guidance


For a listing of allergens available for testing, see Allergens - Immunoglobulin E (IgE) Antibodies



Specimen Required


Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 1 mL

Collection Instructions: Centrifuge and aliquot serum into a plastic vial.


Useful For

Evaluating patients with suspected cat allergy

Highlights

The determination of the relative amount of IgE antibody to total cat dander, and IgE antibodies to cat dander/epithelium components, may aid in assessment of the potential strength and type of allergenic response to cat epithelium.

 

IgE antibody to total specific cat dander extract will initially be tested.

 

If detectable specific total cat dander IgE antibody is present, additional component cat (feline) epithelium allergen antibody testing will be performed. This is comprised of testing for IgE antibodies to the potential allergens Fel d 1, Fel d 2, Fel d 4, and Fel d 7.

Reflex Tests

Test ID Reporting Name Available Separately Always Performed
CATPR Cat Epithelium Components, IgE, S No No

Testing Algorithm

Testing begins with analysis of cat epithelium IgE. If cat epithelium IgE is negative (<0.10 kU/L), testing is complete.

 

If cat epithelium IgE is 0.10 kU/L or more, then 4 cat epithelium components (Fel d 1, Fel d 2, Fel d 4, Fel d 7) will be performed at an additional charge.

Method Name

Fluorescent Enzyme Immunoassay (FEIA)

Reporting Name

Cat Epithelium Component Reflex, S

Specimen Type

Serum

Specimen Minimum Volume

0.6 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Refrigerated (preferred) 14 days
  Frozen  90 days

Reject Due To

Gross hemolysis OK
Gross lipemia OK
Gross icterus OK

Reference Values

Class

IgE kU/L

Interpretation

0

<0.10

Negative

0/1

0.10-0.34

Borderline/equivocal

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

≥100

Strongly positive

 

Concentrations of 0.70 kU/L or more (class 2 and above) will flag as abnormally high.

Reference values apply to all ages.

Day(s) Performed

Monday through Friday

Report Available

Same day/1 to 3 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information

86003

LOINC Code Information

Test ID Test Order Name Order LOINC Value
CATPF Cat Epithelium Component Reflex, S 6833-8

 

Result ID Test Result Name Result LOINC Value
CAT1 Cat Epithelium, IgE, S 6833-8

Forms

If not ordering electronically, complete, print, and send an Allergen Test Request (T236) with the specimen.