Fluorescence Enzyme Immunoassay (FEIA)
Evaluating patients suspected to have a condition associated with eosinophilia or hypereosinophilia. Evaluating patients with elevated peripheral blood eosinophil counts. Managing patients with elevated eosinophil-derived neurotoxin in the context of eosinophil-associated diseases
<70 mcg/L: Normal
70-99 mcg/L: Borderline
> or =100 mcg/L: Elevated
3 - 9 days
Collect specimen in an SST or red top tube. Spin and aliquot into a screw capped plastic tube within 12 hours of collection. Send to Specimen Processing refrigerated.
Serum cannot sit on either gel or cells for longer than 12 hours.
Test performed by Mayo Clinic Laboratories