Vdrl (Syphilis Screening)

VDRL, SERUM

About this test

The VDRL (Venereal Disease Research Laboratory) test is a blood test used to screen for syphilis, a sexually transmitted infection. It detects antibodies produced by the body in response to infection caused by the bacterium Treponema pallidum.

This test is mainly used as a screening tool, meaning it helps identify possible infection, but positive results are usually confirmed with more specific tests.

The VDRL test can also be used to monitor treatment response in patients already diagnosed with syphilis.

Who should get this test done?

This test is recommended for individuals who may be at risk of sexually transmitted infections or require routine screening, including:

• Individuals with multiple sexual partners or unprotected sexual exposure
• Pregnant women (routine antenatal screening)
• People with symptoms such as genital sores, rashes, or unexplained fever
• Individuals diagnosed with other sexually transmitted infections
• Blood donors or organ donors (screening requirement)
• Patients undergoing routine pre-surgical or hospital admission tests
• Healthcare workers or individuals with occupational exposure risk

Why consider this test?

The main purpose of the VDRL test is early detection of Syphilis.

Early diagnosis helps to:

• Detect infection in early stages before complications develop
• Prevent transmission to sexual partners or unborn babies
• Start timely antibiotic treatment
• Avoid long-term complications affecting the heart, brain, and nervous system
• Monitor response to treatment in diagnosed patients

Since syphilis progresses in stages and may not show early symptoms, screening is very important.

More information

The VDRL test is a non-treponemal screening test, meaning it detects general antibodies rather than directly identifying the bacteria. Because of this, false-positive results can sometimes occur due to other medical conditions.

If the VDRL test is positive, confirmatory tests such as TPHA or treponemal antibody tests are usually recommended for accurate diagnosis.

Other names for this test

The VDRL serum test is also known as:

• VDRL Test (Syphilis Screening Test)
• Syphilis Screening Test
• RPR/VDRL Test (Rapid Plasma Reagin / VDRL)
• Non-Treponemal Syphilis Test
• Venereal Disease Test (VDRL)
• STI Screening Test (Syphilis)