ReaginsSyphilis SerodiagnosisSyphilisTreponema pallidumNeurosyphilisFluorescent Treponemal Antibody-Absorption TestPenicillin G BenzathineSyphilis, CongenitalTreponemal InfectionsHemagglutination TestsReagent Kits, DiagnosticPregnancy Complications, InfectiousAntibodies, BacterialPlasmaSerologic TestsFalse Positive ReactionsSensitivity and SpecificityPregnancyHIV InfectionsPlasma CellsCell MembranePlasma GasesPlasma Volume