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Syphilis: Treponemal Antibodies, Chemiluminescence Immunoassay
CPT:
86780
Synonyms
- Syphilis
- Treponemal
Expected Turnaround Time
1 - 3 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Related Documents
Specimen Requirements
Specimen
Serum
Volume
1 mL
Minimum Volume
0.5 mL (Note: This volume does not allow for repeat testing.)
Container
Red-top tube or gel-barrier tube
Storage Instructions
Room temperature
Stability Requirements
| Temperature | Period |
|---|---|
| Room temperature | 14 days |
| Refrigerated | 14 days |
| Frozen | 14 days |
| Freeze/thaw cycles | Stable x3 |
Causes for Rejection
Hemolysis; lipemia; gross bacterial contamination; plasma specimen
Test Details
Use
This test detects antibodies to Treponema pallidum and can be used in conjunction with a nontreponemal assay to aid in the diagnosis of syphilis infection. This test is not recommended as a stand-alone test for general screening purposes for syphilis, nor should it be used to evaluate response to therapy. To screen for and diagnose syphilis infection, a reflex cascade that includes both RPR and a treponemal-specific assay should be utilized per current guidelines.
Limitations
Treponemal antibodies typically persist for life despite treatment; thus, this assay cannot be used to monitor response to treatment or to assess treatment outcomes. False positive treponemal antibody results have been observed in individuals with nonsyphilis treponemal infections (bejel, pinta, yaws).
Methodology
Chemiluminescent immunoassay (CLIA)
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