Bacterial InfectionsIntestine, SmallIntestinesIntestine, LargeHost-Pathogen InteractionsSendai virusMice, Inbred C57BLImmunity, InnateHelicobacter pyloriHelicobacter InfectionsDisease Models, AnimalRespiratory Tract InfectionsCytokinesVirus ReplicationCell LineCytomegalovirus InfectionsMice, Inbred BALB CCells, CulturedIntestinal MucosaMice, KnockoutTime FactorsLungMolecular Sequence DataInflammationReverse Transcriptase Polymerase Chain ReactionGram-Negative Bacterial InfectionsRNA, MessengerListeriosisAnti-Bacterial AgentsAntiviral AgentsPolymerase Chain ReactionApoptosisJejunumInfant, NewbornCytomegalovirusHIV InfectionsGene Expression RegulationSignal TransductionIntestinal AbsorptionIleumCD4-Positive T-LymphocytesGram-Positive Bacterial InfectionsCalcitoninDNA, ViralBacteriaRNA, ViralT-LymphocytesAntigens, ViralAntibodies, ViralNeutrophilsFeverListeria monocytogenesVirus DiseasesSepsisBrainEscherichia coli InfectionsLipopolysaccharidesStaphylococcus aureusHIV-1Pneumonia, BacterialDuodenumIntestinal DiseasesColonCecumPseudomonas InfectionsBacterial Infections and MycosesStaphylococcal InfectionsPseudomonas aeruginosaAntimicrobial Cationic PeptidesPhagocytosisCitrobacter rodentiumLiverIntestinal NeoplasmsGram-Positive BacteriaSkin Diseases, BacterialEscherichia coliMicrovilliGastrointestinal TractGram-Negative BacteriaProtein PrecursorsEpithelial CellsBacterial LoadMacrophagesBacteremiaColony Count, MicrobialStreptococcal InfectionsAnti-Infective AgentsToll-Like Receptor 4Leukocyte CountEnterocytesToll-Like Receptor 2Opportunistic InfectionsDigestive SystemSalmonella Infections, AnimalPeritonitisKlebsiella InfectionsEnterobacteriaceae InfectionsDisease SusceptibilityToll-Like ReceptorsInfection