Drug InteractionsDrug Resistance, ViralHIV Reverse TranscriptaseAnti-HIV AgentsHIV ProteaseMutationHIV-1Mutation, MissenseReverse Transcriptase InhibitorsHIV InfectionsDrug ResistanceDrug Resistance, Multiple, Viralpol Gene Products, Human Immunodeficiency VirusDrug Resistance, MicrobialGenotypePoint MutationHIV Protease InhibitorsDrug Resistance, NeoplasmSequence Analysis, DNANevirapineTreatment FailureViral LoadAntiretroviral Therapy, Highly ActiveDrug Resistance, BacterialAmino Acid SubstitutionDrug Resistance, MultipleZidovudineMicrobial Sensitivity TestsMolecular Sequence DataRNA, ViralAnti-Retroviral AgentsGenes, polAntiviral AgentsHIVGene Products, polHLA-A3 AntigenPolymerase Chain ReactionOrganophosphonatesPhylogenyLamivudineBase SequenceCD4 Lymphocyte CountDrug Resistance, Multiple, BacterialPlasmaPrevalenceDNA, ViralSouth AfricaFrameshift MutationAnti-Bacterial AgentsHIV Integrase InhibitorsRecombination, GeneticGenetic VariationAntitubercular AgentsDrug Resistance, FungalVirus ReplicationAmino Acid SequenceSensitivity and SpecificityGerm-Line MutationPhenotypeMutation RateTuberculosis, Multidrug-ResistantRifampinStreptomycinEscherichia coliDNA Mutational AnalysisTime FactorsAllelesIsoniazidAdenineDisease ResistanceViral ProteinsHerbicide ResistanceBacterial ProteinsP-GlycoproteinMycobacterium tuberculosisPedigreePyrrolidinonesBrazilVascular ResistanceAntimalarialsDNA GyraseHIV IntegraseSelection, GeneticCohort StudiesAntineoplastic AgentsDNA PrimersModels, MolecularCodonMutagenesis, Site-DirectedCell LineMutagenesisCell Line, TumorDNA, BacterialBenzoxazinesPlasmidsGenes, BacterialPyrimethamineStavudineExonsPolymorphism, Genetic