RPR Titer, Quantitative

General Information

Lab Name: RPR Titer, Quantitative
Lab Code: RPRQT
Epic Name: RPR Titer, Quantitative
Description: This quantitative RPR testing is performed in-house at UW. Standalone quantitative RPR testing can be used to monitor patients with a known history of syphilis. For a qualitative RPR screen that reflexes to an RPR titer, please see RPR Screen with Reflex to Titer [RPRQUW]. For reverse algorithm syphilis screening on patients with no known history of syphilis, please see Syphilis Reflexive Screen [SYPHRE]. All RPR testing is performed in-house at UW.
Synonyms: Anti-phospholipid, Antiphospholipid, APL, nontreponemal, Rapid Plasma Reagin, Reagin, Syphilis
Components

Guidelines

Method

Non-treponemal flocculation test

Reference Range

Female		Male		Unknown
Age	Range	Age	Range	Age	Range
0-	Nonreactive [NREAC]	0-	Nonreactive [NREAC]	0-	Nonreactive [NREAC]

Effective date: 01/05/2026

Specimen Type: Serum
Collection: Preferred specimen: 6 mL blood in GOLD SST tube.

Acceptable Specimen: RED top tube.

Pediatric Specimen if different: Minimum 2mL blood, 1mL serum (Do not reject any specimen as partial testing may be done)

Unacceptable Specimens: Plasma
Handling Instructions: Stability: Refrigerated: 14 days (preferred); Frozen at -20°C or colder: Long Term (avoid repeated freeze-thaws)
Quantity: Requested: 1.5 mL
Minimum: 1.0 mL