SyphilisSyphilis, CutaneousSyphilis SerodiagnosisSyphilis, CongenitalTreponema pallidumPenicillin G BenzathineChancreNeurosyphilisPenicillin G ProcainePeriostitisReaginsSyphilis, LatentOral UlcerYawsErythema MultiformeAgeusiaFacial DermatosesPenicillin GHomosexualitySyphilis, CardiovascularChorioretinitisAntibodies, BacterialAntitreponemal AgentsPregnancy Complications, InfectiousSkinSexually Transmitted DiseasesHomosexuality, MaleAnti-Bacterial AgentsHIV InfectionsGonorrheaTreponema Immobilization TestFluorescent Treponemal Antibody-Absorption TestHemagglutination TestsPrevalenceProstitutionSex Workers