Antigens, BacterialAntigensProtozoan InfectionsLatex Fixation TestsAntibodies, BacterialAntigens, NeoplasmArthritis, ReactiveAntigens, SurfaceVeillonellaProtozoan ProteinsAntigens, ViralAntigens, ProtozoanCounterimmunoelectrophoresisImmunoglobulin GEukaryotaCross ReactionsDNA, ProtozoanCiliophoraT-LymphocytesAgglutination TestsImmunoglobulin A, SecretoryAntibody FormationImmunizationLymphocyte ActivationGenes, ProtozoanActinomycesMice, Inbred BALB CHLA-B27 AntigenRNA, ProtozoanEnzyme-Linked Immunosorbent AssayEpitopesAntibodies, MonoclonalAntigens, Polyomavirus TransformingHaemophilus influenzaeImmunoglobulin AHLA AntigensArthritis, InfectiousMeningitisBacterial VaccinesStreptococcus pneumoniaeMice, Inbred C57BLAntigens, FungalYersinia enterocoliticaAntigens, CDGenome, ProtozoanProtozoan Infections, AnimalDendritic CellsAntigens, HelminthNeisseria meningitidisBrucella abortusAntigen-Presenting CellsSalmonellaIntestinesH-2 AntigensLipopolysaccharidesFluorescent Antibody TechniqueEscherichia coliAntigen-Antibody ComplexImmunity, CellularImmunoglobulin MSynovial FluidSpleenInterferon-gammaCells, CulturedMolecular Sequence DataCarcinoembryonic AntigenPolysaccharides, BacterialAntigens, Viral, TumorListeria monocytogenesTetanus ToxoidEntamoeba histolyticaIntestinal MucosaColitisSalmonella typhimuriumLymphocytesAntigen PresentationHLA-DR AntigensReceptors, Antigen, T-CellGiardia lambliaTrypanosoma cruziHistocompatibility AntigensCD4-Positive T-LymphocytesBacterial ProteinsCytokinesProliferating Cell Nuclear AntigenPhagocytosisLeishmaniaHistocompatibility Antigens Class IIProstate-Specific AntigenO AntigensReceptors, Antigen, B-CellAmino Acid SequenceAntibodies, ProtozoanAntigens, CD15ToxoplasmaAntigens, Tumor-Associated, CarbohydrateAlveolataApicomplexaTrypanosomaAntiprotozoal Agents