Estimating the sensitivity of non-treponemal and treponemal antibody tests in primary syphilis

Among patients with primary syphilis, sensitivity of TRUST was 55% (6/11) compared to darkfield microscopy (DFM) and 60% (9/15) compared to Treponema pallidum PCR. Sensitivity of RPR was 78% (38/49) and 93% (43/46), respectively. TPPA had a sensitivity of 95% (41/43) compared to DFM and 96% (43/45) compared to PCR.

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