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Test Code RPRT2 Rapid Plasma Reagin Titer, Serum


Specimen Required


Only orderable as a reflex. For more information see RPRT1 / Rapid Plasma Reagin (RPR) Screen with Reflex to Titer, Serum

 

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.


Useful For

Determining the current disease status

 

Monitoring response to therapy for syphilis

 

This test cannot be used for testing spinal fluid specimens.

Method Name

Only orderable as a reflex. For more information see RPRT1 / Rapid Plasma Reagin (RPR) Screen with Reflex to Titer, Serum

 

Flocculation/Agglutination

Reporting Name

RPR Titer,S

Specimen Type

Serum

Specimen Minimum Volume

See Specimen Required

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Refrigerated (preferred) 14 days
  Frozen  14 days

Reject Due To

No specimen should be rejected.

Reference Values

Only orderable as a reflex. For more information see RPRT1 / Rapid Plasma Reagin (RPR) Screen with Reflex to Titer, Serum

 

Negative

Reference values apply to all ages.

Interpretation

Negative:

No rapid plasma reagin (RPR) detected. Initial reactive RPR screen was likely a false-reactive result. Repeat testing if clinically indicated on a new specimen. 

Positive:

Patients being monitored for response to therapy; a 4-fold or greater decrease in RPR titers between pre- and post-treatment samples indicates response to therapy. Patients evaluated for congenital syphilis: a 4-fold or higher RPR difference between neonate and maternal RPR titers suggests congenital syphilis.

Day(s) Performed

Monday through Saturday

Report Available

Same day/1 to 2 days

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information

86593

LOINC Code Information

Test ID Test Order Name Order LOINC Value
RPRT2 RPR Titer,S 31147-2

 

Result ID Test Result Name Result LOINC Value
616865 RPR Titer,S 31147-2