PneumoniaPneumonia, BacterialPneumonia, ViralPneumonia, PneumococcalCryptogenic Organizing PneumoniaPneumonia, PneumocystisPneumonia, StaphylococcalPneumonia, Ventilator-AssociatedPneumonia, AspirationCommunity-Acquired InfectionsPneumonia, MycoplasmaPneumonia, LipidLung Diseases, InterstitialLungIdiopathic Interstitial PneumoniasStreptococcus pneumoniaeAnti-Bacterial AgentsMurine pneumonia virusPneumocystis jiroveciiPneumocystisLegionnaires' DiseaseBronchoalveolar Lavage FluidRadiography, ThoracicMycoplasma pneumoniaeCross InfectionPulmonary EosinophiliaTrimethoprim-Sulfamethoxazole CombinationBronchopneumoniaHospitalizationPneumonia, Progressive Interstitial, of SheepVentilators, MechanicalBronchoalveolar LavageRespiration, ArtificialRetrospective StudiesIntensive Care UnitsProspective StudiesTreatment OutcomeFatal OutcomePneumonia of Swine, MycoplasmalPseudomonas InfectionsPneumococcal VaccinesAnti-Infective AgentsPneumocystis cariniiEmpyemaLegionella pneumophilaSeverity of Illness IndexRisk FactorsInfluenza, HumanLegionellaPneumococcal InfectionsImmunocompromised HostChild, HospitalizedPentamidineBronchoscopyChlamydial PneumoniaBacteremiaAIDS-Related Opportunistic InfectionsPasteurellosis, PneumonicRespiratory Tract InfectionsTime FactorsPulmonary FibrosisSputumIncidenceKlebsiella InfectionsPseudomonas aeruginosaKlebsiella pneumoniaeAcute DiseaseHaemophilus InfectionsOpportunistic InfectionsLung DiseasesInfant, NewbornPneumovirus InfectionsPneumocystis InfectionsTomography, X-Ray ComputedLength of StayLung AbscessPasteurella InfectionsCohort StudiesSepsisRespiratory InsufficiencyDisease Models, AnimalChlamydophila pneumoniaeIdiopathic Pulmonary FibrosisPneumonia, RickettsialConfusionSensitivity and SpecificityNasopharynxPulmonary AlveoliPleural EffusionMycoplasma InfectionsMineral OilMacrophages, AlveolarHospital MortalityInfluenza A Virus, H1N1 SubtypeLung Diseases, FungalCeftriaxoneIntubation, IntratrachealMacrolidesIntensive CareDeglutition Disorders