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Diagnosis of primary syphilis obtained by dark-field microscopy versus that obtained by the T. pallidum real-time PCRa
| T. pallidum real-time PCR result | No. of cases with the following dark-field microscopy result: |
|
|---|---|---|
| + | − | |
| + | 47 | 46 |
| − | 7 | 616 |
The data are for a total of 716 cases. The sensitivity of the T. pallidum real-time PCR was 87.0%, and its specificity was 93.1%. The kappa value was 0.601, which indicates fair agreement between the results of the two tests.
