Pneumonia, PneumococcalPneumoniaStreptococcus pneumoniaeStreptococcusPneumonia, BacterialPneumonia, ViralStreptococcus pyogenesStreptococcus mutansCommunity-Acquired InfectionsStreptolysinsCryptogenic Organizing PneumoniaStreptococcus agalactiaePneumonia, PneumocystisPneumococcal InfectionsLungStreptococcal InfectionsPneumococcal VaccinesPneumonia, StaphylococcalBacteremiaAnti-Bacterial AgentsPneumonia, MycoplasmaPneumonia, Ventilator-AssociatedPneumonia, AspirationStreptococcus suisCeftriaxoneStreptococcus bovisBacterial ProteinsStreptococcus mitisBronchoalveolar Lavage FluidStreptococcus equiPenicillin ResistanceSerotypingStreptococcus oralisPneumonia, LipidAntigens, BacterialMacrolidesPenicillinsEmpyemaColony Count, MicrobialStreptococcus sobrinusMicrobial Sensitivity TestsPolysaccharides, BacterialNasopharynxRadiography, ThoracicStreptococcus PhagesInterleukin-27Streptococcus gordoniiSputumCephalosporin ResistanceAntibodies, BacterialLung Diseases, InterstitialLegionnaires' DiseaseStreptococcus thermophilusAnti-Infective AgentsMeningitis, PneumococcalCefotaximeMacrophages, AlveolarCounterimmunoelectrophoresisHospitalizationCoagulation Protein DisordersVaccines, ConjugatePsittacosisDisease Models, AnimalBacterial CapsulesDrug Resistance, BacterialBloodBacterial LoadOfloxacinDisease SusceptibilitySepsisFluoroquinolonesLatex Fixation TestsMice, Inbred C57BLAmoxicillinSensitivity and SpecificityPenicillin GLevofloxacinOrthomyxoviridae InfectionsProspective StudiesNeutrophilsIdiopathic Interstitial PneumoniasCephalosporinsEnterococcus faecalisMouthCytokinesConvalescenceBacterial VaccinesPhagocytosisInfluenza, HumanTime FactorsRetrospective StudiesDNA, BacterialErythromycinCoinfectionImmunity, InnateMice, Inbred BALB CNeutrophil InfiltrationMurine pneumonia virusIncidenceSeverity of Illness Index