TP Syphilis Ab Rapid Test (Colloidal Gold Method) One Step ANTI-SYPHILIS Rapid Screen Test is a lateral flow, immunochromatographic screening test. Two Purified recombinant antigens of SYPHILIS are used in test band as capture materials and gold conjugates. If the antibody of Anti-SYPHILIS is present in the sample in concentration above the labeled, complex will be formed.