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FTA-ABS
MessageTesting performed at Quest Diagnostics.
This is a reflex test sent out by the laboratory.
This is a reflex test sent out by the laboratory.
Test Code
FTA-ABS, SERUM(O)
CPT Codes
86780
Preferred Specimen
1 mL serum
Minimum Volume
0.2 mL
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 7 days
Refrigerated: 14 days
Frozen: 30 days
Refrigerated: 14 days
Frozen: 30 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis • Grossly lipemic
Methodology
Immunofluorescent Assay (IFA)
Setup Schedule
Set up: Mon, Wed-Sat; Report available: 1-3 days
Reference Range
Non-Reactive
Clinical Significance
The FTA-ABS is a treponemal assay used to detect antibodies against Treponema pallidum. The FTA-ABS becomes reactive 4-6 weeks after infection. Unlike the nontreponemal (lipoidal antigen) tests, once the FTA-ABS test becomes reactive, it will remain reactive for many years. Since the reactivity found with the FTA-ABS does not indicate response to therapy, it is not suitable for monitoring treatment. The FTA-ABS test does not distinguish between syphilis and other treponemal diseases such as yaws, pinta and bejel.
Last Updated: September 24, 2014
