PneumoniaHost-Pathogen InteractionsPneumonia, BacterialPneumonia, ViralBacterial InfectionsPneumonia, PneumococcalPlant DiseasesVirulenceImmunity, InnateCryptogenic Organizing PneumoniaBacterial ProteinsBacteriaPneumonia, PneumocystisPneumonia, StaphylococcalMacrophagesPneumonia, Ventilator-AssociatedPneumonia, AspirationCommunity-Acquired InfectionsPneumonia, MycoplasmaPneumonia, LipidLung Diseases, InterstitialLungStreptococcus pneumoniaeIdiopathic Interstitial PneumoniasAnti-Bacterial AgentsCross InfectionMurine pneumonia virusPneumocystisMolecular Sequence DataPneumocystis jiroveciiBronchoalveolar Lavage FluidMycoplasma pneumoniaeRadiography, ThoracicLegionnaires' DiseaseAnti-Infective AgentsVirulence FactorsPseudomonas InfectionsTrimethoprim-Sulfamethoxazole CombinationBronchopneumoniaPseudomonas aeruginosaRespiratory Tract InfectionsRetrospective StudiesGram-Negative Bacterial InfectionsPulmonary EosinophiliaHospitalizationPolymerase Chain ReactionTime FactorsFatal OutcomeBacteremiaProspective StudiesRespiration, ArtificialTreatment OutcomeSequence Analysis, DNABronchoalveolar LavageImmunocompromised HostMicrobial Sensitivity TestsGram-Negative BacteriaPneumonia, Progressive Interstitial, of SheepIntensive Care UnitsVentilators, MechanicalPhylogenyDNA, BacterialDisease Models, AnimalColony Count, MicrobialStaphylococcus aureusOpportunistic InfectionsRisk FactorsMice, Inbred C57BLPneumonia of Swine, MycoplasmalPneumocystis cariniiMutationPneumococcal InfectionsSeverity of Illness IndexPneumococcal VaccinesInfluenza, HumanVirusesSensitivity and SpecificityBase SequenceAscomycotaDrug Resistance, BacterialAcute DiseaseEmpyemaLegionellaAmino Acid SequenceKlebsiella pneumoniaeIncidenceInfant, NewbornSputumGram-Positive BacteriaSepsisDisease OutbreaksChlamydial PneumoniaAIDS-Related Opportunistic InfectionsGenome, BacterialKlebsiella InfectionsFungiChild, HospitalizedBronchoscopyMice, Inbred BALB CLegionella pneumophila