Fluorescent Antibody Technique, IndirectFluorescent Antibody TechniqueHIV AntibodiesAntibodies, ViralAntibodies, BacterialAntibodies, MonoclonalTyphus, Endemic Flea-BorneAntibodiesAntibody SpecificityEnzyme-Linked Immunosorbent AssayCross ReactionsHIV SeropositivityHIV InfectionsEhrlichiosisAIDS SerodiagnosisImmunoglobulin MSeroepidemiologic StudiesImmunoglobulin GAntibodies, ProtozoanRickettsia typhiSerologic TestsEhrlichia chaffeensisSensitivity and SpecificityScrub TyphusOrientia tsutsugamushiRickettsia InfectionsAutoantibodiesRadioimmunoprecipitation AssayHIV SeroprevalenceVoluntary ProgramsFluorescent Antibody Technique, DirectAnonymous TestingBartonella henselaeAntigens, ViralBlotting, WesternReagent Kits, DiagnosticCoxiella burnetiiCell LineMolecular Sequence DataEpitopesQ FeverHomosexualityRickettsiaEvaluation Studies as TopicRickettsia rickettsiiAntigens, SurfaceImmunoenzyme TechniquesAntigens, BacterialAntibodies, FungalAntibodies, NeutralizingRocky Mountain Spotted FeverLegionellaAntigens, ProtozoanContraceptive Devices, MaleAcquired Immunodeficiency SyndromeRabbitsMice, Inbred BALB CAmino Acid SequenceHybridomasMolecular WeightAgglutination TestsBrazilAntibodies, AntinuclearAntibody FormationDog DiseasesBorrelia burgdorferi GroupCercopithecus aethiopsCat DiseasesPolymerase Chain ReactionHIV AntigensCells, CulturedHIV-1Recombinant ProteinsLyme DiseaseToxoplasmaViral ProteinsMicroscopy, FluorescenceBase SequenceDogsVero CellsSexual BehaviorViral Envelope ProteinsImmune SeraAntibody AffinityCloning, MolecularImmunoassayVirus ReplicationHIVImmunoblottingBinding Sites, AntibodyAntibodies, Anti-IdiotypicNeutralization TestsBlood DonorsAIDS-Related ComplexSubstance Abuse, IntravenousHIV-2Microscopy, ImmunoelectronCatsHerpesviridae InfectionsAntigen-Antibody Complex