Pneumocystis jiroveciiPneumonia, PneumocystisPneumocystisPneumocystis InfectionsTrimethoprim-Sulfamethoxazole CombinationPneumocystis cariniibeta-GlucansAIDS-Related Opportunistic InfectionsAnti-Infective AgentsHIV InfectionsDihydropteroate SynthasePentamidineAntibodies, FungalPneumoniaDNA, FungalImmunocompromised HostBronchoalveolar Lavage FluidDapsoneSulfamethoxazoleLungOpportunistic InfectionsPneumonia, BacterialTrimethoprimAtovaquonePolymerase Chain ReactionMycologyDNA, Ribosomal SpacerMicrobiological TechniquesMycological Typing TechniquesFungal ProteinsTetrahydrofolate Dehydrogenase