PneumoniaPneumonia, BacterialPneumonia, ViralPneumonia, PneumococcalCryptogenic Organizing PneumoniaPneumonia, PneumocystisAnti-Bacterial AgentsPneumonia, StaphylococcalPneumonia, Ventilator-AssociatedAntibiotic ProphylaxisPneumonia, AspirationCommunity-Acquired InfectionsPneumonia, MycoplasmaMicrobial Sensitivity TestsPneumonia, LipidDrug Resistance, BacterialDrug Resistance, MicrobialLung Diseases, InterstitialStreptomycesAminoglycosidesStreptococcus pneumoniaeAntibiotics, AntineoplasticBacteriaCross InfectionLungAnti-Infective AgentsPenicillinsbeta-LactamsBacterial InfectionsGentamicinsDrug UtilizationMacrolidesIdiopathic Interstitial PneumoniasPseudomonas aeruginosaStaphylococcus aureusErythromycinTrimethoprim-Sulfamethoxazole CombinationCephalosporinsPseudomonas InfectionsDrug Resistance, Multiple, BacterialAmpicillinGram-Negative BacteriaRetrospective StudiesTreatment OutcomeMurine pneumonia virusBacteremiaPneumocystis jiroveciiBacterial ProteinsEscherichia coliProspective StudiesGram-Positive BacteriaFermentationPneumocystisTetracyclineLegionnaires' DiseaseBronchoalveolar Lavage FluidMycoplasma pneumoniaeRadiography, ThoracicVancomycinStaphylococcal InfectionsCiprofloxacinIntensive Care UnitsHospitalizationCeftriaxonePenicillin GCefazolinAmoxicillinKanamycinBronchopneumoniaGram-Negative Bacterial InfectionsTime FactorsAcute DiseaseDNA, BacterialDrug Therapy, CombinationStreptomycinClindamycinPenicillin ResistancePneumococcal InfectionsColony Count, MicrobialSurgical Wound InfectionLactamsPulmonary EosinophiliaSepsisTobramycinAzithromycinRespiration, ArtificialDrug PrescriptionsThienamycinsVentilators, MechanicalBronchoalveolar LavageKlebsiella InfectionsRisk FactorsPneumonia, Progressive Interstitial, of SheepChloramphenicolPhysician's Practice PatternsFatal OutcomeFluoroquinolonesEmpyemaMethicillin-Resistant Staphylococcus aureusChemistry