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rapid plasma reagin (RPR) test[rap´id plaz´mah re´ah-jin]
any of a group of screening flocculation tests for syphilis, using a modified VDRL antigen.
rap·id plas·ma re·a·gin test
a group of serologic tests for syphilis in which unheated serum or plasma is reacted with a standard test antigen containing charcoal particles; positive tests yield a flocculation. A modification, called the RPR (circle) card test, is widely used as a screening test.
Synonym(s): RPR test
abbreviation for rapid plasma reagin test, a screening test for syphilis.