FecesHelicobacter InfectionsHelicobacter pyloriAntigens, BacterialEntamoebaEntamoebiasisImmunologic TestsBreath TestsAntigensSensitivity and SpecificityEntamoeba histolyticaDyspepsiaImmunoenzyme TechniquesAntigens, NeoplasmUreaAntigens, SurfaceAntigens, ViralAntigens, ProtozoanAntigens, Polyomavirus TransformingHLA AntigensAntigens, FungalAntigens, HelminthAntigens, CDH-2 AntigensCarcinoembryonic AntigenAntigens, Viral, TumorDiarrheaHLA-DR AntigensReceptors, Antigen, T-CellAntibodies, MonoclonalHistocompatibility AntigensProliferating Cell Nuclear AntigenO AntigensHistocompatibility Antigens Class IIEnzyme-Linked Immunosorbent AssayEpitopesProstate-Specific AntigenReceptors, Antigen, B-CellAntigens, CD15Antigens, Tumor-Associated, CarbohydrateHLA-A2 AntigenAntigens, CD8T-LymphocytesImmunoglobulin GCross ReactionsBlood Group AntigensHepatitis B Surface AntigensAntigens, CD3GastroenteritisMolecular Sequence DataHLA-A AntigensDefecationMice, Inbred BALB CHistocompatibility Antigens Class IAntibody SpecificityAntibodies, BacterialLymphocyte ActivationHLA-D AntigensReceptors, AntigenAntigens, CD45Hepatitis B AntigensFluorescent Antibody TechniqueAntigens, CD4Antigen-Antibody ReactionsAntigens, CD1Immune SeraIntestinal Diseases, ParasiticAntibody FormationHLA-B AntigensImmunizationCell LineAntigens, DifferentiationAmino Acid SequenceB-LymphocytesMART-1 AntigenHIV AntigensAntigens, CD80Parasite Egg CountPolymerase Chain ReactionEpstein-Barr Virus Nuclear AntigensBase SequenceAntigens, CD19Mice, Inbred C57BLAntigens, HeterophileImmunoglobulin MHepatitis B Core AntigensSpleenAntigens, CD40ImmunodiffusionAutoantigensAntibodiesAntibodies, HelminthAntibodies, ViralAntigens, Thy-1Forssman AntigenMolecular WeightAntigen-Antibody ComplexGiardiasisH-Y AntigenFlow Cytometry