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HelpTest Code LAB5374 Syphilis Antibody, Treponema pallidum Particle Agglutination, Serum
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Reporting Name
Syphilis Ab by TP-PA, SSpecimen Type
SerumOrdering Guidance
This assay is recommended by the Centers for Disease Control and Prevention for sera testing positive by a screening treponemal assay and negative by rapid plasma reagin (RPR). The results of this assay assist in determining whether the results of a screening treponemal test are truly or falsely positive.
Specimen Required
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume: 0.5 mL
Collection Instructions: Centrifuge and aliquot serum into a plastic vial.
Reject Due To
| Gross hemolysis | Reject |
| Gross lipemia | Reject |
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 14 days | |
| Frozen | 14 days |
Specimen Minimum Volume
0.3 mL
Special Instructions
Day(s) Performed
Monday through Friday
Specimen Retention Time
14 daysReport Available
Same day/1 to 4 daysReference Values
Negative
Useful For
An aid to resolve discrepant results between screening treponemal and non-treponemal assays
This test is not recommended for general screening purposes for syphilis.
This test should not be used to evaluate response to therapy.
This test is not intended for medical-legal use.
Testing Algorithm
For more information see Syphilis Serology Algorithm.
CPT Code Information
86780
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| TPPA | Syphilis Ab by TP-PA, S | 24312-1 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| 61480 | Syphilis Ab by TP-PA, S | 24312-1 |
Forms
If not ordering electronically, complete, print, and send Infectious Disease Serology Test Request (T916) with the specimen.