Feedback
Treponema pallidum Antibody, IgG by IFA (FTA-ABS), Serum
0050477
Ordering Recommendation
Not an optimal confirmation test. Treponema pallidum Antibody by TP-PA (0050777) is preferred.
Mnemonic
FTA
Methodology
Semi-Quantitative Indirect Fluorescent Antibody
Performed
Sun-Sat
Reported
Within 24 hours  
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
Specimen Required
Patient Preparation
  
Collect
Serum separator tube.  
Specimen Preparation
Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.2 mL)  
Storage/Transport Temperature
Refrigerated.  
Unacceptable Conditions
CSF, plasma, or other body fluids. Contaminated, hemolyzed, or severely lipemic specimens.  
Remarks
  
Stability
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)  
Reference Interval
Nonreactive  
Interpretive Data
 
Note
The Fluorescent Treponema Antibody (FTA) is recommended for follow-up of reactive nontreponemal tests for syphilis, and as a single test in patients suspected of late syphilis. The FTA may be used to resolve discrepancies between laboratory results and clinical impressions. FTA tests for syphilis may be falsely positive in some cases of systemic lupus erythematosus, pregnancy, and leprosy.

Can be used to provide additional evidence of neurosyphilis when VDRL-CSF test results are reactive.
CPT Code(s)
86780
Components
Component Test Code*Component Chart NameLOINC
0050477T.Pallidum Ab, IgG (FTA-ABS)17726-1
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • Fluorescent Treponemal Antibody Absorption Test
  • Fluorescent Treponemal Antibody, Serum, IgG
  • FTA, Serum
  • FTA-ABS
  • Syphilis Ab FTA-ABS
  • T pallidum Ab FTA-ABS
  • Treponema Antibody, Serum
  • Treponema pallidum Antibody FTA-ABS, Serum