Syphilis, LatentSyphilisSyphilis SerodiagnosisNeurosyphilisSyphilis, CongenitalPenicillin G BenzathineTreponema pallidumSerologic TestsSyphilis, CutaneousReaginsSyphilis, CardiovascularAntibodies, BacterialEnzyme-Linked Immunosorbent AssayYawsSensitivity and SpecificityAntitreponemal AgentsHemagglutination TestsPregnancy Complications, InfectiousAntigens, BacterialImmunoglobulin MChancreTreponema Immobilization TestFluorescent Treponemal Antibody-Absorption TestSexually Transmitted DiseasesImmunoglobulin GHomosexuality, MalePenicillin G ProcaineAntibodies, HelminthAntigens, HelminthGonorrheaAntigens, Protozoan