Sensitive detection of Treponema pallidum DNA from the whole blood of patients with syphilis by the nested PCR assay.

From the results, it is clear that the detection rate of TP-DNA was the highest (60.4%) when the blood RPR titer ranged from 0 to 16, as opposed to compared with those when the RPR titer ranged from 32 to 64 (45.5%) or when it was at or beyond 128 (33.3%); however, these differences did not reach statistical significance ( p = 0.176 and 0.126, respectively).

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