Fig. 2. Comparison of the quantitative results of TPLA between true reactive TPLA [TPLA(+)/RPR(-)/CMIA(+)] and false reactive TPLA [TPLA(+)/RPR(-)/CMIA(-)] cases in the reverse algorithm. Dotted line represents the cutoff index of TPLA test.
Abbreviations: TPLA, Treponema pallidum latex agglutination; RPR, rapid plasma regain; CMIA, chemiluminescent microparticle immunoassay.