After a positive non-treponemal test, which option is the appropriate next step?

After a positive non-treponemal test, which option is the appropriate next step?

• A. Non-treponemal test alone is sufficient for diagnosis
• B. Treponemal test should not be used
• C. HIV testing
• D. Treponemal test for confirmation

Answer: (D)

A positive non-treponemal screen signals possible syphilis but isn’t specific to Treponema pallidum, so the next step is a treponemal-specific test to confirm infection. Treponemal tests (such as FTA-ABS, TP-PA, or a treponemal enzyme immunoassay) detect antibodies directed against T. pallidum and remain reactive in true infections, providing the needed confirmation that the initial screen suggested. If the treponemal test is positive, you confirm the diagnosis and proceed with staging and treatment, using non-treponemal titers to monitor response over time. While HIV testing is important for comprehensive care, it is not the confirmatory step for syphilis after a positive non-treponemal test.

A positive non-treponemal screen signals possible syphilis but isn’t specific to Treponema pallidum, so the next step is a treponemal-specific test to confirm infection. Treponemal tests (such as FTA-ABS, TP-PA, or a treponemal enzyme immunoassay) detect antibodies directed against T. pallidum and remain reactive in true infections, providing the needed confirmation that the initial screen suggested. If the treponemal test is positive, you confirm the diagnosis and proceed with staging and treatment, using non-treponemal titers to monitor response over time. While HIV testing is important for comprehensive care, it is not the confirmatory step for syphilis after a positive non-treponemal test.