The Full Form of RPR is Rapid plasma reagin.

The rapid plasma reagin (RPR) test is a blood test that looks for antibodies to syphilis. Syphilis is a sexually transmitted disease (STD) that first causes symptoms common to many other illnesses. Early symptoms include rash, fever, swollen glands, muscle aches, and sore throat.

In addition, people who have early-stage syphilis may have sores (lesions). These sores can pass the infection on to other people during sexual contact.

If not detected, syphilis can stay in the body for years. It can harm internal organs. Over time it can cause numbness, paralysis, blindness, and even death. But it can be easily cured if treated in the early stages. Treatment is one or more shots of penicillin G benzathine.

The RPR test looks for antibodies that react to syphilis in the blood. This means the test doesn’t detect the actual bacteria cause syphilis. Instead, it looks for antibodies against substances given off by cells that have been harmed by the bacteria.