Comparison of two syphilis antibody assays based on cardiolipin antigen.

Abstract

Two different antisyphilis screening tests based on cardiolipin antigen, the VDRL test and an RPR test (Sysmic, Diagast), were compared. A total of 2155 sera were examined by both tests. Positive results were confirmed with TPHA and TPI tests. RPR Sysmic test was as sensitive and specific as the VDRL. However, the RPR Sysmic test was easier and quicker, especially when the number of sera tested was high.