ARUP's Laboratory Test Directory

Allergen, Epidermals and Animal Proteins, Feather Mix : 0055037

Mnemonic: FEATHER

Methodology: Qualitative ImmunoCAP® Fluorescent Enzyme Immunoassay
Performed: Sun-Sat
Reported: 1-2 days
Specimen Required: Patient Prep: Multiple patient encounters should be avoided.

Collect: Serum separator tube. Multiple specimen tubes should be avoided.

Specimen Preparation: Separate serum from cells ASAP or within 2 hours of collection. Transfer 0.25 mL serum plus 0.1 mL for each additional allergen ordered to an ARUP Standard Transport Tube. (Min: 0.25 mL plus 0.04 mL for each allergen ordered)

Storage/Transport Temperature: Refrigerated.

Unacceptable Conditions: Hemolyzed, icteric, or lipemic specimens.

Stability (collection to initiation of testing): After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year
Reference Interval:
Negative
Interpretive Data: Allergen results of 0.10-0.34 kU/L are intended for specialist use as the clinical relevance is undetermined. Although increasing ranges are reflective of increasing concentrations of allergen-specific IgE, this may not correlate with the degree of clinical response or skin testing when challenged with a specific allergen. The correlation of allergy laboratory results with clinical history and in vivo reactivity to specific allergens is essential. A negative test may not rule out clinical allergy or even anaphylaxis.
Note: This assay provides a single qualitative (positive/negative) result only.  It does not provide information on the amount of IgE specific for any of the component allergens (goose, chicken, duck and turkey feathers).
CPT Code(s): 86003 
Cross References: Feather Mixture (Chicken, Duck, Goose, Turkey) (Allergen, Epidermals and Animal Proteins, Feather Mi, ImmunoCAP® ex71 (Allergen, Epidermals and Animal Proteins, Feather Mix)