Rapid Plasma Reagin (RPR) is a qualitative nontreponemal flocculation test for detection of reagin antibodies in serum and plasma as a screening test in syphilis serology.
If testing will be performed > 5 days past collection, centrifuge and separate serum from cells and transfer to plastic vials; do not freeze whole blood.| Plasma samples > 5 days past collection are not suitable for testing.