Test Overview
Test Methodology

Indirect Fluorescent Antibody (IFA), Treponema pallidum substrate

Test Usage

CSF FTA-ABS testing is not recommended by the CDC, but may be used to rule out neurosyphilis if the CSF FTA-ABS is reported as nonreactive.

Reference Range *

Nonreactive

Test Limitations

The FTA-ABS should not be used to follow treatment or establish reinfection since specific treponemal tests may remain reactive for life. FTA-ABS test for syphilis has been reported to be falsely positive in patients with diseases associated with abnormally high globulin concentrations. In the absence of historical or clinical evidence of treponemal infection, a reactive minimal result (1+) should be considered equivocal.

Test Details
Days Set Up
Tuesday, Friday
Analytic Time

8 hours

Soft Order Code
FTAC
MiChart Code
Fluor Treponemal AB, CSF
Synonyms
  • FTAC
  • Fluorescent Treponemal Ab, CSF
  • Treponema pallidum Antibody, CSF
  • Fluorescent Treponemal Antibody - Absorption
  • Syphilis Antibody, CSF
  • FTA, Spinal Fluid
Laboratory
Chemical Pathology
Section
Immunopathology
Specimen Requirements
Collection Instructions

Collect spinal fluid; refrigerate.

Alternate Specimen
None
Normal Volume
1 mL CSF
Minimum Volume
0.5 mL CSF
Billing
CPT Code
86780
Fee Code
30942
NY State Approved
No