The OnSite Syphilis Ab Combo Rapid Test is a lateral flow chromatographic immunoassay for the qualitative detection of antibodies (IgG, IgM and IgA) to Treponema pallidum (Tp) in human serum, plasma or whole blood.Detects IgG, IgM and IgA antibodies facilitating accurate screening during all stages of disease. Simple test procedure. Uses serum, plasma or whole blood specimens. Efficient, easy to interpret result. No additional equipment required. External evaluations validate performance.