Reagent Kits, DiagnosticBiological AssaySensitivity and SpecificityImmunoassayReproducibility of ResultsInterferon-gamma Release TestsEnzyme-Linked Immunosorbent AssayClinical Laboratory TechniquesSpecimen HandlingLaboratoriesQuality ControlFalse Negative ReactionsClostridium difficilePolymerase Chain ReactionImmunoenzyme TechniquesFalse Positive ReactionsRadioimmunoassayReference StandardsMolecular Diagnostic TechniquesPredictive Value of TestsTuberculosisMycobacterium tuberculosisTime FactorsReverse Transcriptase Polymerase Chain ReactionMolecular Sequence DataBiological MarkersBacterial ProteinsAntibodies, ViralCell Line, TumorProspective StudiesCell SurvivalBase SequenceRNA, ViralBreast NeoplasmsUnited StatesCell LineCattleMicrobial Sensitivity TestsAntibodies, MonoclonalRecombinant ProteinsEscherichia coliKineticsCells, Cultured