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Test Code CBL Blastomyces Antibody by Immunodiffusion, Spinal Fluid

Performing Laboratory

Mayo Medical Laboratories in Rochester

Reporting Name

Blastomyces Ab Immunodiffusion, CSF

Method Name


Useful For

Detection of antibodies in patients having blastomycosis

Specimen Required

Container/Tube: Sterile vial

Specimen Volume: 0.5 mL

Forms: If not ordering electronically, complete, print, and send a Neurology Test Request Form (T732) with the specimen (

Specimen Type


Specimen Minimum Volume

0.3 mL

Reject Due To


Mild OK; Gross OK


Mild OK; Gross OK





Specimen Stability Information

Specimen Type Temperature Time
CSF Refrigerated (preferred) 14 days
  Frozen  14 days

Reference Values



A positive result is suggestive of infection, but the results cannot distinguish between active disease and prior exposure. Furthermore, detection of antibodies in cerebrospinal fluid (CSF) may reflect intrathecal antibody production, or may occur due to passive transfer or introduction of antibodies from the blood during lumbar puncture.


Routine fungal culture of clinical specimens (eg, CSF) is recommended in cases of suspected blastomycosis involving the central nervous system.

Analytic Time

2 days

Day(s) and Time(s) Performed

Monday through Friday; 9:30 a.m.

Specimen Retention Time

14 days

CPT Code Information


LOINC Code Information

Result ID Reporting Name LOINC Code
15134 Blastomyces Immunodiffusion (CSF) 51741-7

Test Classification

This test uses a standard method. Its performance characteristics were determined by Mayo Clinic in a manner consistent with CLIA requirements.