PneumocystisPneumonia, PneumocystisPneumocystis InfectionsPneumocystis jiroveciiPneumoniaPneumonia, BacterialPneumonia, ViralPneumonia, PneumococcalTrimethoprim-Sulfamethoxazole CombinationCryptogenic Organizing PneumoniaPentamidinePneumonia, StaphylococcalAIDS-Related Opportunistic InfectionsLungPneumonia, Ventilator-AssociatedDapsonePneumonia, AspirationBronchoalveolar Lavage FluidImmunocompromised HostOpportunistic InfectionsSulfamethoxazoleCommunity-Acquired InfectionsPneumonia, Mycoplasmabeta-GlucansAntibodies, FungalAtovaquoneAnti-Infective AgentsPneumonia, LipidTrimethoprimLung Diseases, InterstitialDihydropteroate SynthaseDNA, FungalBronchoalveolar LavageAcquired Immunodeficiency SyndromeNaphthoquinonesSputumMacrophages, AlveolarImmunocompetenceAnti-Bacterial AgentsMethenamineAntigens, FungalImmunosuppressionPolymerase Chain ReactionAntifungal AgentsIdiopathic Interstitial PneumoniasRadiography, ThoracicMice, SCIDAmidinesStreptococcus pneumoniaeFatal OutcomeBronchoscopyHIV InfectionsRetrospective StudiesPulmonary AlveoliMurine pneumonia virusFungal ProteinsCross InfectionProspective StudiesSulfamethoxypyridazineLegionnaires' DiseaseCortisoneMycoplasma pneumoniaeFolic Acid AntagonistsRespiration, ArtificialAdrenal Cortex HormonesDisease Models, AnimalMolecular Sequence DataHospitalizationTrimetrexateTreatment OutcomeSensitivity and SpecificityPulmonary EosinophiliaAerosolsLung DiseasesPneumocystis cariniiAntibiotic ProphylaxisMediastinal EmphysemaRisk FactorsBronchopneumoniaAutopsy