Test Code Al SwPotato Sweet Potato, IgE
Reporting Name
Sweet Potato, IgEUseful 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 Required
Container/Tube:
Preferred: Red top
Acceptable: Serum gel
Specimen Volume: 0.5 mL for each 5 allergens requested
Additional Information: Designate specific allergens from the list in Allergens-IgE Antibodies in Special Instructions.
Specimen Type
SerumSpecimen Minimum Volume
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 |
Day(s) and Time(s) Performed
Monday through Friday; 9 a.m.-8 p.m., Saturday; 8 a.m.-3 p.m.
Performing Laboratory

Method Name
Fluorescence Enzyme Immunoassay (FEIA)
Method Description
Specific IgE from the patient's serum reacts with the allergen of interest, which is covalently coupled to an ImmunoCAP. After washing away nonspecific IgE, enzyme-labeled anti-IgE antibody is added to form a complex. After incubation, unbound anti-IgE is washed away and the bound complex is then incubated with a developing agent. After stopping the reaction, the fluorescence of the eluate is measured. Fluorescence is proportional to the amount of specific IgE present in the patient's sample (ie, the higher the fluorescence value, the more IgE antibody is present).(Package insert: ImmunoCAP System Specific IgE FEIA, Uppsala, Sweden Rev 02/2005)
Reference Values
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 |
≥100 |
Strongly positive |
Reference values apply to all ages.
Test Classification
This test has been cleared or approved by the U.S. 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 |
---|---|---|
SPOT | Sweet Potato, IgE | 7627-3 |
Result ID | Test Result Name | Result LOINC Value |
---|---|---|
SPOT | Sweet Potato, IgE | 7627-3 |
Reject Due To
Hemolysis |
Mild OK; Gross OK |
Lipemia |
Mild OK; Gross OK |
Icterus |
NA |
Other |
NA |