- A reactive serologic test (nontreponemal: Venereal Disease Research Laboratory (VDRL) or rapid plasma reagin (RPR); treponemal: fluorescent treponemal antibody absorbed (FTA-ABS) or microhemagglutination assay for antibody to T. pallidum (MHA-T]).
- een reactieve serologische test (non-treponemale reacties: VDRL (Venereal Disease Research Laboratory) of RPR (rapid plasma reagin); treponemale reacties: FTA-ABS (fluorescent treponemal antibody absorbed) of MHA-TP (microhemagglutination assay for antibody to T. pallidum)).