SulfamethoxazolePneumocystisPneumonia, PneumocystisPneumocystis jiroveciiPneumocystis InfectionsTrimethoprim-Sulfamethoxazole CombinationTrimethoprimDapsonePentamidineAnti-Infective AgentsAnti-Bacterial AgentsMicrobial Sensitivity TestsDihydropteroate SynthaseDrug HypersensitivityAIDS-Related Opportunistic InfectionsTrimethoprim ResistanceSulfisoxazoleOpportunistic InfectionsDrug Resistance, BacterialDrug Resistance, Multiple, BacterialDrug CombinationsAtovaquoneIntegronsSulfamethoxypyridazineSulfadiazineImmunocompromised Host4-Aminobenzoic Acidbeta-GlucansFolic Acid AntagonistsBronchoalveolar Lavage FluidAntibodies, FungalTropherymaUrinary Tract InfectionsLungStenotrophomonas maltophiliaDNA, FungalNocardia InfectionsAntifungal AgentsPolymerase Chain ReactionDrug Resistance, MicrobialWhipple DiseaseHaptensDrug SynergismEscherichia coli InfectionsShigella sonneiNocardiaAcquired Immunodeficiency SyndromeAnti-Infective Agents, UrinaryMegaloblastsTetrahydrofolate DehydrogenaseNaphthoquinonesColony Count, MicrobialDrug EruptionsVibrio cholerae O1Escherichia coliShigellaMethenamineAntigens, FungalCiprofloxacinHydroxylaminesSalmonella entericaEnterobacteriaceaeSalmonellaHIV InfectionsRifampinSulfonamidesMice, SCIDImmunosuppressionElectrophoresis, Gel, Pulsed-FieldNalidixic AcidImmunocompetenceMolecular Sequence DataTabletsMacrophages, AlveolarBacterial InfectionsDrug Therapy, CombinationSequence Analysis, DNA