Retroviridae InfectionsEndogenous RetrovirusesRetroviridaeGammaretrovirusHuman T-lymphotropic virus 1DeltaretrovirusEndemic DiseasesAntigensHistocompatibility Antigens Class IICell LineHLA-D AntigensAntigens, SurfaceAntigens, BacterialAntigens, NeoplasmHLA-DR AntigensHuman T-lymphotropic virus 2Antigens, ViralDeltaretrovirus InfectionsHLA AntigensAntigens, ProtozoanHTLV-I InfectionsHLA-DQ AntigensAntigens, HelminthMolecular Sequence DataT-LymphocytesAntibodies, MonoclonalHLA-DP AntigensDeltaretrovirus AntibodiesBetaretrovirusAntigens, CDHistocompatibility Antigens Class IEnzyme-Linked Immunosorbent AssayBase SequenceAntigens, Polyomavirus TransformingHistocompatibility AntigensH-2 AntigensPulmonary Adenomatosis, OvineGenes, MHC Class IIBrazilRetroviruses, SimianImmunoenzyme TechniquesB-LymphocytesPolymerase Chain ReactionAntigens, FungalInterferon-gammaAmino Acid SequenceImmunoglobulin GEpitopesFluorescent Antibody TechniqueAntibodies, HelminthLeukemia Virus, MurineLeishmaniasis, VisceralGenetic VectorsLymphocyte ActivationParasite Egg CountProvirusesMajor Histocompatibility ComplexMice, Inbred BALB CDNA, ViralMalariaAntigens, Viral, TumorAntibodies, ProtozoanSchistosomiasis mansoniCells, CulturedReceptors, Antigen, T-CellGene Products, envMalaria, FalciparumAntibody SpecificityGoiter, EndemicCarcinoembryonic AntigenHuman T-lymphotropic virus 3Terminal Repeat SequencesAntigens, CD8TravelSeroepidemiologic StudiesMalaria, VivaxAntibodies, ViralMoloney murine leukemia virusPlasmodium falciparumReceptors, Antigen, B-CellBlood DonorsInsect VectorsCross ReactionsRetroviridae ProteinsFlow CytometrySerologic TestsGene Products, gagAntibodies, BacterialPlasmodium vivaxSimian T-lymphotropic virus 1PrevalenceSensitivity and SpecificityRecombinant ProteinsCoccidioidomycosisAnthelminticsHLA-A AntigensProliferating Cell Nuclear AntigenGenes, ViralLymphocytesMice, Inbred C57BL