What does the RPR test measure?

The RPR test, which stands for Rapid Plasma Reagin, is specifically designed to detect the presence of antibodies that are produced in response to an infection with Treponema pallidum, the bacterium that causes syphilis. When a person is infected with syphilis, the immune system responds by generating these antibodies, which can be identified through the RPR test.

This test is commonly utilized as a screening tool for syphilis because it is relatively quick and easy to perform. It works by measuring non-specific antibodies that are indicative of an active infection but does not detect the bacterium itself. Due to its role in identifying cases of syphilis early, the RPR test provides critical information for diagnosis and subsequent treatment.

Other options do not relate to the function of the RPR test. The presence of DNA pertains to tests that identify genetic material, which is not the focus of the RPR. Blood glucose levels are measured by different specific tests used to assess diabetes and metabolic conditions. White blood cell counts evaluate the immune system and are involved in identifying infections and other health issues; however, they are not indicative of syphilis specifically. Thus, the RPR test's focus on antibodies for syphilis specifically supports its