Bacterial InfectionsHost-Pathogen InteractionsRespiratory Tract InfectionsImmunity, InnateSendai virusHelicobacter pyloriMice, Inbred C57BLHelicobacter InfectionsDisease Models, AnimalVirus ReplicationCytokinesCytomegalovirus InfectionsCell LineMice, Inbred BALB CCells, CulturedGram-Negative Bacterial InfectionsAnti-Bacterial AgentsLungTime FactorsHIV InfectionsInflammationAntiviral AgentsMice, KnockoutReverse Transcriptase Polymerase Chain ReactionInfant, NewbornMolecular Sequence DataPolymerase Chain ReactionListeriosisCytomegalovirusDNA, ViralVirus DiseasesAntibodies, ViralGram-Positive Bacterial InfectionsApoptosisCD4-Positive T-LymphocytesRNA, ViralRNA, MessengerSignal TransductionAntigens, ViralFeverCalcitoninGene Expression RegulationT-LymphocytesStaphylococcal InfectionsStaphylococcus aureusBacteriaHIV-1NeutrophilsSepsisListeria monocytogenesMycosesEscherichia coli InfectionsPneumonia, BacterialOpportunistic InfectionsSkin Diseases, BacterialPseudomonas InfectionsLipopolysaccharidesInfectionBrainBacteremiaPseudomonas aeruginosaStreptococcal InfectionsAnti-Infective AgentsUrinary Tract InfectionsBacterial Infections and MycosesGram-Negative BacteriaPhagocytosisGram-Positive BacteriaDisease SusceptibilityAntimicrobial Cationic PeptidesMacrophagesParasitic DiseasesPeritonitisToll-Like Receptor 2Bacterial LoadToll-Like Receptor 4Acute DiseaseToll-Like ReceptorsColony Count, MicrobialProspective StudiesImmunocompromised HostKlebsiella InfectionsCitrobacter rodentiumPicornaviridae InfectionsEnterobacteriaceae InfectionsWound InfectionSkin Diseases, InfectiousStreptococcus pneumoniaeAntibiotic ProphylaxisSalmonella InfectionsLeukocyte CountPneumoniaEscherichia coliMicrobial Sensitivity TestsCoinfectionInterferon-gammaNeutropeniaRisk FactorsSalmonella Infections, AnimalDrug Resistance, Bacterial