PneumocystisPneumonia, PneumocystisPneumoniaPneumocystis InfectionsPneumocystis jiroveciiPneumonia, BacterialPneumonia, ViralPneumonia, PneumococcalCryptogenic Organizing PneumoniaPneumonia, StaphylococcalPneumonia, Ventilator-AssociatedTrimethoprim-Sulfamethoxazole CombinationPneumonia, AspirationPentamidineCommunity-Acquired InfectionsPneumonia, MycoplasmaLungPneumonia, LipidBronchoalveolar Lavage FluidAIDS-Related Opportunistic InfectionsLung Diseases, InterstitialDapsoneImmunocompromised HostOpportunistic InfectionsSulfamethoxazoleAnti-Infective Agentsbeta-GlucansAnti-Bacterial AgentsIdiopathic Interstitial PneumoniasAntibodies, FungalAtovaquoneBronchoalveolar LavageTrimethoprimStreptococcus pneumoniaeRadiography, ThoracicDihydropteroate SynthaseDNA, FungalProspective StudiesRetrospective StudiesMurine pneumonia virusTreatment OutcomeSputumAcquired Immunodeficiency SyndromeLegionnaires' DiseaseFatal OutcomeCross InfectionSeverity of Illness IndexMycoplasma pneumoniaeMacrophages, AlveolarRisk FactorsHospitalizationBronchoscopyImmunocompetencePulmonary EosinophiliaNaphthoquinonesPolymerase Chain ReactionRespiration, ArtificialTime FactorsBronchopneumoniaImmunosuppressionPneumonia, Progressive Interstitial, of SheepAntifungal AgentsPulmonary AlveoliMethenamineVentilators, MechanicalAntigens, FungalIntensive Care UnitsHIV InfectionsPneumocystis cariniiDisease Models, AnimalAmidinesSensitivity and SpecificityAdrenal Cortex HormonesIncidenceLung DiseasesMice, SCIDCohort StudiesPneumonia of Swine, MycoplasmalPseudomonas InfectionsPneumococcal VaccinesAcute DiseaseEmpyemaDrug Therapy, CombinationTomography, X-Ray ComputedInfluenza, HumanFollow-Up StudiesLegionella pneumophilaRespiratory Tract InfectionsPulmonary FibrosisAerosolsAutopsyFungal ProteinsMolecular Sequence DataSymptom AssessmentChild, HospitalizedSulfamethoxypyridazineLegionellaRespiratory InsufficiencyLung Diseases, FungalPneumococcal Infections