A Rapid Plasma Reagin (RPR) Test is a blood test used to screen you for Syphilis. It works by detecting the nonspecific antibodies that your body produces while fighting the infection. Syphilis is a sexually transmitted infection (STI) caused by the spirochete bacterium Treponema pallidum.

False-positive results have been associated in patients with infections, pregnancy, autoimmune disease, old age, Gaucher disease and malignancy.

Preparation: No fasting is required for this test.