AntigensAntigens, BacterialAntigens, ViralSensitivity and SpecificityAntigens, FungalReagent Kits, DiagnosticPharyngitisImmunologic TestsEntamoebaEntamoebiasisAntigens, ProtozoanEnzyme-Linked Immunosorbent AssayAntigens, NeoplasmLatex Fixation TestsAntigens, HelminthAntigens, SurfaceImmunoassayImmunoenzyme TechniquesPolymerase Chain ReactionEntamoeba histolyticaTonsillitisCounterimmunoelectrophoresisFluorescent Antibody Technique, DirectAntibodies, MonoclonalEvaluation Studies as TopicClinical Laboratory TechniquesEmpyemaFecesStreptococcal InfectionsVirologyMannansNeurocysticercosisStreptococcus pyogenesAntigens, Polyomavirus TransformingDiagnostic Techniques and ProceduresHLA AntigensHistoplasmosisImmunoglobulin GParasitologyFluorescent Antibody TechniquePneumonia, PneumococcalAgglutination TestsImmunochromatographyCross ReactionsBacteriological TechniquesAntigens, CDFalse Positive ReactionsH-2 AntigensSpecimen HandlingLimit of DetectionSerologic TestsAntibodies, ViralAntibodies, BacterialCarcinoembryonic AntigenAntibody SpecificityImmunoglobulin MAdenovirus Infections, HumanHistoplasmaAntibodies, HelminthReproducibility of ResultsAntigens, Viral, TumorNasopharynxStreptococcus pneumoniaePharynxChlamydia trachomatisPredictive Value of TestsHLA-DR AntigensReceptors, Antigen, T-CellAntibodies, FungalAntibodies, ProtozoanReagent StripsUrineTime FactorsDNA, ProtozoanHistocompatibility AntigensProliferating Cell Nuclear AntigenChlamydia InfectionsMolecular Sequence DataProstate-Specific AntigenMicrobiological TechniquesHIV Core Protein p24EpitopesHistocompatibility Antigens Class IIO AntigensReceptors, Antigen, B-CellMicroscopyParisHemagglutination TestsVirus CultivationReverse Transcriptase Polymerase Chain ReactionProspective StudiesRespiratory Tract InfectionsFalse Negative ReactionsAntigens, Tumor-Associated, CarbohydrateRespiratory Syncytial VirusesAntigens, CD15RabbitsT-LymphocytesBloodHLA-A2 Antigen