Blastomyces Antibody, Complement Fixation, Serum

Test Code

933

CPT Codes
86317

Preferred Specimen

1 mL serum

Minimum Volume

0.1 mL

Instructions

Note: For CSF use test code 5294 - Blastomyces Antibody Compliment Fixation, CSF.

Transport Container

Transport tube

Transport Temperature

Room temperature

Specimen Stability

Room temperature: 7 days
Refrigerated: 14 days
Frozen: 30 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Gross hemolysis • Grossly lipemic • Grossly icteric

Methodology
Complement Fixation (CF)

FDA Status
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Setup Schedule

Mon, Wed, Fri, Sat

Report Available

4-7 days

Reference Range

<1:8 titer

Titer	Interpretation
<1:8	Antibody Not Detected
≥1.8	Antibody Detected

Clinical Significance

Although titers of 1:8 and greater are considered positive, confirmed serological diagnosis of blastomycosis by the CF test requires a four-fold or greater increase in titer between acute and convalescent specimens, and lack of corresponding titers to C. immitis and H. capsulatum. Specificity can only be demonstrated by immunodiffusion procedures. A negative CF test does not rule out the diagnosis of active blastomycosis, as less than 50% of sera from patients with proven blastomycosis are positive by this assay.

Performing Laboratory

Quest Diagnostics Nichols Institute-San Juan Capistrano, CA

33608 Ortega Highway

San Juan Capistrano, CA 92675-2042

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.