False Positive ReactionsTreponema Immobilization TestSyphilisSyphilis SerodiagnosisSyphilis, CongenitalLatex Fixation TestsSyphilis, CutaneousTreponema pallidumSyphilis, LatentPatch TestsFalse Negative ReactionsSensitivity and SpecificityNeurosyphilisReaginsSyphilis, CardiovascularSkin TestsHemagglutination TestsSerologic TestsEnzyme-Linked Immunosorbent AssayComplement Fixation TestsCross ReactionsEvaluation Studies as TopicAgglutination TestsImmunoenzyme TechniquesAntibodies, BacterialYawsAlgorithmsFluorescent Antibody TechniquePregnancy Complications, InfectiousReproducibility of ResultsAntitreponemal AgentsBacteriological TechniquesReagent Kits, DiagnosticImmunohistochemistryChancrePregnancyAntigens, BacterialPolymerase Chain ReactionImmunoglobulin MMass ScreeningHistocytochemistrySparganumSexually Transmitted DiseasesAntigens, HelminthDermatitis, OccupationalImmune SeraSeroepidemiologic StudiesHomosexuality, MalePrevalencePenicillin G ProcaineHIV InfectionsAntibodies, MonoclonalGonorrheaDermatitis, Photoallergic