SerologySerologic TestsSensitivity and SpecificityDiagnostic ErrorsDiagnostic Tests, RoutineDiagnostic Techniques and ProceduresEnzyme-Linked Immunosorbent AssayAntibodies, BacterialReagent Kits, DiagnosticDiagnostic ImagingPolymerase Chain ReactionReproducibility of ResultsAntibodies, ViralPredictive Value of TestsImmunoglobulin GSeroepidemiologic StudiesMolecular Diagnostic TechniquesImmunoglobulin MRetrospective StudiesROC CurveBiopsyFalse Positive ReactionsProspective StudiesClinical Laboratory TechniquesSyphilisDiagnostic and Statistical Manual of Mental DisordersHelicobacter pyloriPneumonia, MycoplasmaDiagnostic ServicesSyphilis SerodiagnosisPrevalenceComplement Fixation TestsHelicobacter InfectionsParasitologyMycoplasma pneumoniaeEvaluation Studies as TopicToxocariasisChagas DiseaseAntibodies, HelminthTomography, X-Ray ComputedAntigens, BacterialCeliac DiseaseImmunoassayBiological MarkersFalse Negative ReactionsAntibodies, ProtozoanAgglutination TestsTreponema pallidumBacteriological TechniquesChlamydophila pneumoniaeInfant, NewbornRisk FactorsBrazilTrypanosoma cruziTime FactorsDiagnosisLeptospirosisToxocaraImmunologic TestsImmunoenzyme TechniquesCase-Control StudiesVirologyFluorescent Antibody Technique, IndirectImmunoglobulin AEchinococcosisDog DiseasesBartonella henselaeWhooping CoughSpecimen HandlingHemagglutination TestsMicroscopyMagnetic Resonance ImagingToxocara canisAcute DiseaseTransglutaminasesLeptospiraBrucellosisFollow-Up StudiesEchinococcus granulosusFecesCoxiella burnetiiMass ScreeningChlamydia InfectionsPregnancyCohort StudiesQ FeverPrognosisBreath TestsTreatment OutcomeDNA, BacterialCross ReactionsSerotypingSeverity of Illness IndexDisease OutbreaksDiagnosis, Computer-AssistedLeishmania infantumAntigens, ViralReference StandardsBiopsy, NeedleChronic Disease