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Test Code Billings Clinic: 9028 Syphilis Screen (Treponema Assay) with Reflex, Serum

Important Note

This test should be ordered on patients with an unknown Syphilis status.

If you are monitoring a patient with a previously positive result, please order the RPR (#7008).

The performance of this assay has not been established with neonatal specimens

Results from patients taking biotin supplements or receiving high-dose biotin therapy should be interpreted with caution due to possible interference with this test.

Performing Laboratory

Billings Clinic Laboratory: Chemistry

Mayo Medical Lab (if applicable)

 

Useful For

An aid in the diagnosis of active Treponema pallidum infection.

Methodology

SYPHILIS AB:   Direct Chemiluminometric (Direct Sandwich Immunoassay)

RPR:                 Flocculation/Agglutination (if applicable)

TP-PA:              Particle Agglutination (if applicable)

Specimen Requirements

Serum should be physically separated from cells as soon as possible with a maximum limit of two hours from the time of collection.

 

Serum

  • Draw blood in a plain, red-top tube(s) or a serum gel tube(s).
  • Spin down and send 1.0 mL of serum frozen

Storage/Stability

Specimen Type Temperature Time
Serum Refrigerated (preferred) 7 days
  Ambient 7 days
  Frozen 1 month

 

Reject Due To

  • Specimens other than serum
  • Specimens with apparent contamination
  • Specimens frozen/thawed more than once
  • Heat-inactivated specimens
  • Gross hemolysis

Reference Values

Nonreactive

Day(s) Test Set Up

Daily

Test Classification and CPT Coding

86780 - Antibody; Treponema pallidum

86592 - Syphilis test, non-treponemal antibody; qualitative (eg, VDRL, RPR, ART) (if applicable)

86780 - Antibody; Treponema pallidum (TP-PA) (if applicable)

 

LOINC Code Information

Reporting Name LOINC Code
Syphilis Antibody 63464-2
RPR (if applicable) 20507-0
Syphilis Ab by TP-PA (if applicable) 24312-1

 

Profile/Testing Information

Profile Information:
Syphilis Antibody (Treponema Assay)
Reflex Tests (at an additional charge):
RPR RPR Titer if RPR is Positive

Treponema pallidum TP-PA to Mayo (if RPR negative)

 

Please refer to the Syphilis Algorithm under Resources