Why do I keep testing positive for syphilis?
Christopher Snyder
Updated on February 27, 2026
The most common reason for a false-positive is that a person produces antibodies that "fool" the syphilis test. This may occur because the antibodies are similar to the syphilis antibody or because they interfere with chemical reactions needed to perform the test for syphilis.
Will you always test positive for syphilis?
The antibodies produced as a result of a syphilis infection can stay in your body even after your syphilis has been treated. This means you might always have positive results on this test.Why do I keep having a false-positive test for syphilis?
False-positive result may be seen in certain acute or chronic infections (e.g., tuberculosis, hepatitis, malaria, early HIV infection), autoimmune diseases (e.g., systemic lupus, rheumatoid arthritis), injection drug use, pregnancy, and following vaccination (e.g., smallpox, MMR).Which syphilis test stays positive after treatment?
Treponemal tests, also called confirmatory tests (FTA, TP-PA, EIA), detect antibodies specific to syphilis. Treponemal antibodies will appear earlier after acute infection than non-treponemal antibodies. The antibodies detected in these tests usually remain detectable for life even after successful treatment.How long does syphilis test stay positive after treatment?
Remember that treponemal tests will generally stay positive for life, so if the patient has previously been treated for syphilis, this is the expected serologic result.40. What if my first syphilis test is positive, but the follow-up test is negative?
Do syphilis antibodies go away?
pallidum antibodies can be used to diagnose primary syphilis. By RPR, antibodies disappear in 6-24 months after treatment in many patients, suggesting that a change in titer may be an indicator of treatment success.Does syphilis stay in your body forever?
After the initial infection, the syphilis bacteria can remain inactive in the body for decades before becoming active again. Early syphilis can be cured, sometimes with a single shot (injection) of penicillin.Will I test negative for syphilis after treatment?
People usually test negative for these antibodies after successful treatment for syphilis infection. Nontreponemal antibody tests are usually used as an initial screening test and a positive result must be confirmed with another type of test.How do you know if syphilis is cured?
After you're treated for syphilis, your doctor will ask you to:
- Have periodic blood tests and exams to make sure you're responding to the usual dosage of penicillin. ...
- Avoid sexual contact with new partners until the treatment is completed and blood tests indicate the infection has been cured.