Test Overview
Test Methodology

Double immunodiffusion

Test Usage

Tests are performed with standardized antigens of A. flavus, A. niger and A. fumigatus. Positive results, represented by one or more precipitin lines, are indicative of fungus ball, allergic bronchopulmonary aspergillosis (ABA), or invasive aspergillosis. Generally, the finding of 3-4 bands will indicate either fungus ball or ABA, with many cases of invasive aspergillosis requiring serum concentration for demonstration of precipitin lines.

Reference Range *

Aspergillus fumigatus Neg: <1:1
Aspergillus flavus Neg: <1:1
Aspergillus niger Neg: <1:1

Test Details
Days Set Up
Monday - Friday
Analytic Time

5 - 11 days

Soft Order Code
FASAB
MiChart Code
Aspergillus antibodies by Immunodiffusion (Sendout)
Synonyms
  • FIDAX
  • ASPERGILLUS IMMUNODIFFUSION
  • Aspergillus flavus Antibody
  • Aspergillus niger Antibody
  • Aspergillus fumigatus Antibody
  • Aspergillus Precipitins
  • FASP
  • Aspergillus Ab, ID, Serum
Laboratory
Sendout
Reference Laboratory
Mayo FASAB (Labcorp )
Section
Special Testing
Specimen Requirements
Collection Instructions

Collect specimen in a red top or SST tube. Centrifuge, aliquot serum within 30 minutes into a plastic vial and freeze.

Normal Volume
1 mL serum
Minimum Volume
0.5 mL serum
Additional Information

Test sent to Mayo Medical Laboratories; performed by Focus Diagnostics.

Billing
CPT Code
86603 x3
Fee Code
20267
NY State Approved
No