Opportunistic InfectionsAIDS-Related Opportunistic InfectionsAcquired Immunodeficiency SyndromeHIV InfectionsPneumonia, PneumocystisCD4 Lymphocyte CountMycobacterium avium-intracellulare InfectionToxoplasmosis, CerebralAntiretroviral Therapy, Highly ActiveCytomegalovirus RetinitisMeningitis, CryptococcalImmunocompromised HostImmune Reconstitution Inflammatory SyndromeCryptococcosisAnti-HIV AgentsHIV-1Sarcoma, KaposiMycobacterium avium ComplexCytomegalovirus InfectionsAIDS Dementia ComplexMicrosporidiosisLymphoma, AIDS-RelatedCandidiasis, OralHIVHIV SeropositivityAIDS-Related ComplexT-Lymphocytopenia, Idiopathic CD4-PositiveAnti-Retroviral AgentsPneumocystisMycosesHomosexualityAntifungal AgentsCryptococcus neoformansCryptosporidiosisHistoplasmosisViral LoadLeukoencephalopathy, Progressive MultifocalMycobacterium InfectionsLung Diseases, ParasiticToxoplasmosisMicrosporidaTrimethoprim-Sulfamethoxazole CombinationMedicine, African TraditionalFluconazoleCD4-Positive T-LymphocytesPneumocystis jiroveciiCandidiasisMycobacterium aviumEncephalitozoonosisTuberculosisNocardia InfectionsCytomegalovirusCryptococcusPneumocystis InfectionsLymphopeniaTuberculosis, PulmonaryZidovudineRetrospective StudiesToxoplasmaPolymerase Chain ReactionBrazilNamibiaHIV SeronegativityDrug Therapy, CombinationPenicilliumFatal OutcomeImmunologic Deficiency SyndromesImmunosuppressive AgentsHerpes ZosterFoscarnetAmphotericin BLymphatic DiseasesPrevalenceCoinfectionPneumocystis cariniiBacterial InfectionsRetroviruses, SimianInfectionSouth AfricaGanciclovirTreatment OutcomeParasitic DiseasesIndiaIncidenceCohort StudiesCandidaOrgan TransplantationProspective StudiesAntiviral AgentsTime FactorsThymic Factor, CirculatingCD4-CD8 RatioAnti-Infective AgentsEncephalitozoonT-LymphocytesRisk FactorsAntiprotozoal AgentsMolecular Sequence DataProtozoan InfectionsCandida albicans