Pneumonia, PneumococcalPneumoniaPneumonia, BacterialStreptococcus pneumoniaePneumonia, AspirationPneumonia, ViralCommunity-Acquired InfectionsRespiratory AspirationCryptogenic Organizing PneumoniaStreptolysinsPneumonia, PneumocystisLungPneumonia, StaphylococcalPneumococcal VaccinesPneumonia, Ventilator-AssociatedPneumonia, MycoplasmaBacteremiaPneumococcal InfectionsSuctionCeftriaxoneBronchoalveolar Lavage FluidAnti-Bacterial AgentsPneumonia, LipidBiopsy, Fine-NeedleRadiography, ThoracicEmpyemaBiopsy, NeedleInterleukin-27Aspirations (Psychology)Lung Diseases, InterstitialSputumLegionnaires' DiseaseColony Count, MicrobialPenicillin ResistanceMacrophages, AlveolarMacrolidesCephalosporin ResistanceCoagulation Protein DisordersHospitalizationSensitivity and SpecificityPsittacosisCounterimmunoelectrophoresisMeconium Aspiration SyndromePenicillinsProspective StudiesRetrospective StudiesDisease Models, AnimalNasopharynxAntigens, BacterialPenicillin GDisease SusceptibilityPolysaccharides, BacterialIdiopathic Interstitial PneumoniasCefotaximeMice, Inbred C57BLOrthomyxoviridae InfectionsVaccines, ConjugateBacterial LoadConvalescenceCytokinesSerotypingTreatment OutcomeNeutrophilsInfluenza, HumanBronchoscopyLatex Fixation TestsAmoxicillinAnti-Infective AgentsAntibodies, BacterialSepsisTime FactorsOfloxacinSeverity of Illness IndexMurine pneumonia virusMicrobial Sensitivity TestsPneumocystis jiroveciiMeningitis, PneumococcalNeutrophil InfiltrationCoinfectionBloodIncidencePneumocystisChemokine CXCL2LevofloxacinImmunity, InnateDeglutition DisordersBacterial ProteinsMice, Inbred BALB CCephalosporinsCross InfectionEndoscopic Ultrasound-Guided Fine Needle AspirationMycoplasma pneumoniaeRisk FactorsBacterial VaccinesMice, KnockoutPhagocytosis