Pneumonia, PneumococcalPneumoniaCampylobacter jejuniPneumonia, BacterialStreptococcus pneumoniaeCampylobacter InfectionsMultiplex Polymerase Chain ReactionPneumonia, ViralCommunity-Acquired InfectionsAnti-Bacterial AgentsBacterial InfectionsCryptogenic Organizing PneumoniaStreptolysinsPneumonia, PneumocystisLungPneumonia, StaphylococcalPneumococcal VaccinesPneumonia, MycoplasmaPneumonia, Ventilator-AssociatedBacteremiaPneumonia, AspirationPneumococcal InfectionsCeftriaxoneBronchoalveolar Lavage FluidPneumonia, LipidRadiography, ThoracicEmpyemaInterleukin-27Lung Diseases, InterstitialLegionnaires' DiseaseSputumColony Count, MicrobialPenicillin ResistanceMacrolidesCephalosporin ResistanceMacrophages, AlveolarCoagulation Protein DisordersHospitalizationPsittacosisCounterimmunoelectrophoresisPenicillinsNasopharynxAntigens, BacterialDisease Models, AnimalPenicillin GDisease SusceptibilityPolysaccharides, BacterialIdiopathic Interstitial PneumoniasCefotaximeOrthomyxoviridae InfectionsVaccines, ConjugateMice, Inbred C57BLBacterial LoadConvalescenceProspective StudiesSerotypingSensitivity and SpecificityCytokinesInfluenza, HumanNeutrophilsLatex Fixation TestsAmoxicillinAnti-Infective AgentsAntibodies, BacterialOfloxacinRetrospective StudiesMurine pneumonia virusSepsisPneumocystis jiroveciiMeningitis, PneumococcalMicrobial Sensitivity TestsNeutrophil InfiltrationCoinfectionSeverity of Illness IndexBloodPneumocystisChemokine CXCL2LevofloxacinImmunity, InnateBacterial ProteinsIncidenceTreatment OutcomeTime FactorsCephalosporinsMice, Inbred BALB CMycoplasma pneumoniaeCross InfectionBacterial VaccinesMice, KnockoutPhagocytosis