Drug Resistance, ViralAnti-HIV AgentsHIV-1HIV InfectionsAnti-Retroviral AgentsHIV Reverse TranscriptaseDrug Resistance, Multiple, ViralHIV ProteaseReverse Transcriptase Inhibitorspol Gene Products, Human Immunodeficiency VirusAntiretroviral Therapy, Highly ActiveMutationViral LoadGenotypeMutation, MissenseCD4 Lymphocyte CountHIV Protease InhibitorsDrug ResistanceNevirapineDrug Resistance, MicrobialZidovudineTreatment FailurePoint MutationHIVRNA, ViralSequence Analysis, DNAOrganophosphonatesDrug Resistance, NeoplasmLamivudineMicrobial Sensitivity TestsGenes, polAmino Acid SubstitutionBenzoxazinesDrug Resistance, BacterialMolecular Sequence DataDrug Resistance, MultipleAntiviral AgentsSouth AfricaGene Products, polInfectious Disease Transmission, VerticalRitonavirStavudineLopinavirAcquired Immunodeficiency SyndromeAdeninePhylogenyIndinavirHIV Integrase InhibitorsPolymerase Chain ReactionHIV Fusion InhibitorsPlasmaDrug Therapy, CombinationBase SequenceNelfinavirHLA-A3 AntigenVirus ReplicationPrevalencePregnancy Complications, InfectiousPyrimidinonesCohort StudiesDNA, ViralDidanosineIntegrase InhibitorsDrug Resistance, Multiple, BacterialAntitubercular AgentsSaquinavirTime FactorsGenetic VariationPyrrolidinonesViremiaPhenotypeAnti-Bacterial AgentsFrameshift MutationAmino Acid SequenceDideoxynucleosidesRecombination, GeneticSensitivity and SpecificityMedication AdherenceBrazilHIV SeropositivityTreatment OutcomeUgandaAIDS-Related Opportunistic InfectionsP-GlycoproteinDrug Resistance, FungalOxazinesHIV-Associated Lipodystrophy SyndromeTuberculosis, Multidrug-ResistantRifampinGerm-Line MutationProtease Inhibitors