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Test Code FGA13M Galactose-Alpha-1,3-Galactose (Alpha-Gal), IgE, Serum

Additional Codes

Mayo ALGAL
Epic ID LAB4812

 

Specimen Type

Serum


Ordering Guidance


Other meat allergen IgE antibody tests may be considered in addition to galactose-alpha-1,3-galactose IgE antibody testing in cases of suspected red meat allergy.

 

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



Specimen Required


Supplies: Sarstedt Aliquot Tube, 5 mL (T914)

Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 0.5 mL for every 5 allergens requested

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


Specimen Minimum Volume

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
UPH Waterloo Region Lab Test Catalog Note:

Transport refrigerated.

Reject Due To

Gross hemolysis OK
Gross lipemia OK

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Method Name

Fluorescence Enzyme Immunoassay (FEIA)

Useful For

As an aid in diagnosis of an IgE mediated hypersensitivity allergy to non-primate mammalian red meat, such as beef, pork, venison, and meat-derived products (eg, gelatin)

 

This test is not useful in patients previously treated with immunotherapy to determine if residual clinical sensitivity exists.

 

This test is not useful for patients in whom medical management does not depend upon identification of allergen specificity.

Day(s) Performed

Monday through Friday

Report Available

Same day/1 to 3 days

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.

CPT Code Information

86008