- 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]).
- Réaction sérologique positive [tests non tréponémiques: Venereal Disease Research Laboratory (VDRL) ou rapid plasma reagin (RPR); tests tréponémiques: test d'immunofluorescence absorbée (fluorescent treponemal antibody absorbed - FTA-ABS) ou test de microhémagglutination (microhemagglutination assay for antibody to T. pallidum - MHA-TP)].