[Selected aspects of syphilis serology].

The relative incidence of latent syphilis, which can only be detected by serological techniques, has continued to increase. As a matter of routine, we use the TPHA test for screening, the FTA-Abs test for confirmation, and the IgM tests to control the therapeutic outcome. Nowadays, neurosyphilis can definitely be detected by serologic procedures, such as the TPHA index.