NevirapineReverse Transcriptase InhibitorsHIV Reverse TranscriptaseAnti-HIV AgentsBenzoxazinesDrug Resistance, ViralHIV-1HIV InfectionsZidovudineDelavirdineStavudineHIV Protease InhibitorsOrganophosphonatesRNA-Directed DNA PolymeraseLamivudineOxazinesAntiretroviral Therapy, Highly ActiveDrug Resistance, Multiple, ViralAdeninePyrimidinonesDideoxynucleosidesLopinavirDidanosineInfectious Disease Transmission, VerticalRitonavirViral LoadAnti-Retroviral AgentsPyridazinesPyranocoumarinsNucleosidesCD4 Lymphocyte CountDrug Therapy, CombinationDideoxynucleotidesZalcitabineHIVRNA, ViralTreatment FailureMutationPregnancy Complications, InfectiousNelfinavirPlasmaDrug InteractionsVirus ReplicationHIV-Associated Lipodystrophy SyndromeRibonuclease HIndinavirHIV ProteaseAntiviral AgentsMutation, MissenseGenotypeHIV Integrase InhibitorsMolecular Sequence DataTelomeraseSaquinavirAcquired Immunodeficiency SyndromeReverse Transcriptase Polymerase Chain ReactionBotswanaThymine NucleotidesAcidosis, LacticPyridinesReverse TranscriptionDrug Resistance, MicrobialLipodystrophypol Gene Products, Human Immunodeficiency VirusIntegrase InhibitorsFuransHIV-2Base SequenceAmino Acid SubstitutionPyrrolidinonesPregnancyTreatment OutcomeCell LineProtease InhibitorsArea Under CurveOxidoreductases, N-DemethylatingNitrilesAnilidesInhibitory Concentration 50BenzoxazolesDrug Administration ScheduleDNA, ViralChromatography, High Pressure LiquidPyridonesSouth AfricaUgandaDrug CombinationsAvian myeloblastosis virusExanthemaFoscarnetMicrobial Sensitivity TestsCohort StudiesDeoxycytidineDrug MonitoringSequence Analysis, DNAPolymerase Chain ReactionBurundiMolecular StructureErythrocebus patasDNA, Mitochondrial