These are blood tests used to diagnose syphilis, a sexually transmitted infection (STI). These tests can detect the formation of antibodies even in the early stages of syphilis infection. VDRL RPR Tests are performed on blood samples called serum or plasma. These tests measure the presence and level of antibodies in the blood.
VDRL RPR Value Range
If the test results are negative, it means that you are not infected with syphilis. However, even in the early stages of syphilis, test results can be negative. Therefore, repeat testing may be necessary.
If the test results are positive, this indicates exposure to syphilis. Positive results should be repeated to confirm the infection, and a doctor should be consulted for treatment. If left untreated, syphilis can progress and cause serious health problems.
VDRL RPR Tests are not used solely to diagnose syphilis. These tests can also be used to diagnose other conditions, such as some autoimmune diseases and other infections.

In tests, results are expressed as a titer. The titer is a measure of the concentration of antibodies in the sample. The higher the titer in a person with syphilis, the more severe the infection is considered to be.
VDRL test results start at 1/1 and can reach a maximum of 1/512. RPR test results are also expressed as a titer and start at 1/1. However, the RPR test is more sensitive than the VDRL test and is generally more widely used.
Test results are interpreted according to the ranges determined by the laboratory. However, these ranges can vary by laboratory and country. Therefore, it is important to discuss your test results with your doctor.
VDRL RPR These tests can be performed in the early stages of syphilis as well as in the more advanced stages. These tests can be repeated over periods ranging from a few weeks to several years.