[Diagnosis and follow-up of syphilis by serological tests (author's transl)].

Sensitivity and specificity of TPHA, TPI, RPCF, Kline's and Kolmer's tests are compared in a retrospective study carried out on 2,500 sera. The interest of these tests differs as far as diagnosis and survey of syphilis are concerned and the association of TPHA with a quantitative test as Kline's test appears optimal. TPHA is highly sensitive and specific. Its positivity, which usually remains after treatment, is particularly valuable in the diagnosis of cases of late syphilis. Its association with a quantitative test brings a better evaluation of the evolutivity of the disease.