Acquired Immunodeficiency SyndromeImmunodeficiency Virus, FelineMurine Acquired Immunodeficiency SyndromeSyndromeFeline Acquired Immunodeficiency SyndromeHIV-1Leukemia Virus, FelineHIV InfectionsCatsSimian immunodeficiency virusHIVAIDS-Related Opportunistic InfectionsCat DiseasesSimian Acquired Immunodeficiency SyndromeAIDS-Related ComplexImmunologic Deficiency SyndromesCalicivirus, FelineCoronavirus, FelineHomosexualitySevere Combined ImmunodeficiencyHIV SeropositivityZidovudineMolecular Sequence DataAnti-HIV AgentsFeline PanleukopeniaVirus ReplicationSarcoma Viruses, FelineCD4 Lymphocyte CountCommon Variable ImmunodeficiencyPneumonia, PneumocystisFeline Infectious PeritonitisHIV AntibodiesLymphoma, AIDS-Relatedtat Gene Products, Human Immunodeficiency VirusFeline panleukopenia virusHIV AntigensAntiretroviral Therapy, Highly ActiveHIV-2Gene Products, gagRNA, ViralDeltaretrovirusLentivirus InfectionsHIV Envelope Protein gp120DNA, ViralRetroviridae InfectionsCell LineSarcoma, KaposiViral LoadBase SequenceMacaca mulattaLeukemia, FelineHIV Core Protein p24Cytomegalovirus RetinitisOpportunistic InfectionsAmino Acid SequenceAntigens, CD4CD4-Positive T-LymphocytesDown SyndromeMetabolic Syndrome XReverse Transcriptase InhibitorsT-LymphocytesRetroviridae ProteinsGene Products, envAntibodies, ViralToxoplasmosis, CerebralPolymerase Chain ReactionMutationHIV Reverse TranscriptaseProvirusesAntiviral AgentsRNA-Directed DNA Polymerasenef Gene Products, Human Immunodeficiency VirusLymphatic DiseasesHIV SeronegativityAIDS SerodiagnosisDidanosineGenes, envgag Gene Products, Human Immunodeficiency VirusFatal OutcomeSubstance Abuse, IntravenousReceptors, CCR5AIDS Dementia ComplexHIV SeroprevalenceAIDS VaccinesHIV Protease InhibitorsNeutralization TestsHIV Long Terminal RepeatPentamidineUnited Statesrev Gene Products, Human Immunodeficiency VirusTime FactorsGene Products, tatZalcitabineRisk FactorsLeukocytes, MononuclearCells, CulturedHemophilia AImmunocompromised HostCD4-CD8 RatioGenes, gag