Table 1. The results of antibodies to T. pallidum of 297 serum samples detected by different methods.

Study subjects	ELISA	ELISA for IgM	CLIA(S/CO)	Western blot
6 false-positive sera	P	N	<1.00	N
16 control sera
8 IgG-positive and IgM-negative sera	P	N	3.57±0.60	P
8 IgG-positive and IgM-positive sera	P	P	3.28±0.42	B or P
275 sera	P	P	3.23±0.71	—