Acquired Immunodeficiency SyndromeCatsImmunodeficiency Virus, FelineCat DiseasesSyndromeMurine Acquired Immunodeficiency SyndromeFeline Acquired Immunodeficiency SyndromeLeukemia Virus, FelineHIV-1HIV InfectionsSimian immunodeficiency virusHIVAIDS-Related Opportunistic InfectionsSimian Acquired Immunodeficiency SyndromeAIDS-Related ComplexImmunologic Deficiency SyndromesCalicivirus, FelineCoronavirus, FelineHomosexualitySevere Combined ImmunodeficiencyMolecular Sequence DataHIV SeropositivityFeline PanleukopeniaZidovudineAnti-HIV AgentsVirus ReplicationSarcoma Viruses, FelineCD4 Lymphocyte CountCommon Variable ImmunodeficiencyPneumonia, PneumocystisFeline Infectious PeritonitisHIV AntibodiesLymphoma, AIDS-Relatedtat Gene Products, Human Immunodeficiency VirusFeline panleukopenia virusHIV AntigensAntiretroviral Therapy, Highly ActiveHIV-2Lentivirus InfectionsRNA, ViralGene Products, gagDeltaretrovirusDNA, ViralBase SequenceRetroviridae InfectionsHIV Envelope Protein gp120Cell LineLeukemia, FelineSarcoma, KaposiViral LoadMacaca mulattaHIV Core Protein p24Amino Acid SequenceCytomegalovirus RetinitisOpportunistic InfectionsAntigens, CD4CD4-Positive T-LymphocytesDown SyndromeMetabolic Syndrome XReverse Transcriptase InhibitorsT-LymphocytesRetroviridae ProteinsAntibodies, ViralGene Products, envPolymerase Chain ReactionToxoplasmosis, CerebralMutationHIV Reverse TranscriptaseProvirusesRNA-Directed DNA PolymeraseAntiviral Agentsnef Gene Products, Human Immunodeficiency VirusLymphatic DiseasesHIV SeronegativityAIDS SerodiagnosisGenes, envDidanosineFatal Outcomegag Gene Products, Human Immunodeficiency VirusSubstance Abuse, IntravenousTime FactorsReceptors, CCR5AIDS Dementia ComplexHIV SeroprevalenceAIDS VaccinesHIV Protease InhibitorsNeutralization TestsHIV Long Terminal RepeatPentamidineUnited StatesCells, Culturedrev Gene Products, Human Immunodeficiency VirusRisk FactorsGene Products, tatLeukocytes, MononuclearZalcitabineCD4-CD8 RatioImmunocompromised HostHemophilia AGenes, gag