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Treponema pallidum Antibody, IgG by IFA (FTA-ABS), Serum
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Ordering Recommendation
Not an optimal confirmation test. Treponema pallidum Antibody by TP-PA (0050777) is preferred.
Mnemonic
Methodology
Semi-Quantitative Indirect Fluorescent Antibody
Performed
Sun-Sat
Reported
1-3 days
New York DOH Approval Status
Specimen Required
Serum separator tube.
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)
Refrigerated.
CSF, plasma, or other body fluids. Contaminated, hemolyzed, or severely lipemic specimens.
After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)
Reference Interval
Nonreactive
Interpretive Data
FDA
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.
Hotline History
CPT Codes
86780
Components
| Component Test Code* | Component Chart Name | LOINC |
|---|---|---|
| 0050477 | T.Pallidum Ab, IgG (FTA-ABS) | 17726-1 |
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
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