IntestinesIntestinal MucosaIntestine, SmallIntestinal DiseasesIleumColonTrichomonadidaJejunumIntestinal AbsorptionCrohn DiseasePaneth CellsCoronaviridae InfectionsColitis, UlcerativeInflammatory Bowel DiseasesDuodenumSwineIntestine, LargeGerm-Free LifeCaco-2 CellsColitisEnterocytesMucositisPeroxidaseIntestinal PolypsGastrointestinal TractDisease Models, AnimalSucraseIntestinal NeoplasmsBacterial AdhesionReperfusion InjuryParatuberculosisEpithelial CellsRNA, MessengerMycobacterium avium subsp. paratuberculosisRats, WistarPermeabilityImmunohistochemistryCecumMice, Inbred C57BLSwine DiseasesDiarrheaDextran SulfateFecesMucinsDigestive SystemAdministration, OralLymphoid TissuePeyer's PatchesRandom AllocationMice, Inbred BALB CAnimals, NewbornTissue EngineeringRats, Sprague-DawleyMicrovilliMice, KnockoutTime FactorsReverse Transcriptase Polymerase Chain ReactionGene Expression RegulationRabbitsPolymerase Chain ReactionEscherichia coli InfectionsEnterotoxinsAnimal FeedMuscle, SmoothColonic NeoplasmsGene ExpressionCells, CulturedMolecular Sequence DataEscherichia coliTissue DistributionMacaca mulattaOrgan Culture TechniquesP-GlycoproteinIn Situ HybridizationBiological TransportVirulenceCell DifferentiationTumor Necrosis Factor-alphaCell LineEpitheliumCytokinesCattleSpecies SpecificityLiverCell ProliferationBase SequenceModels, BiologicalDose-Response Relationship, DrugSignal TransductionBlotting, WesternUp-RegulationDown-RegulationDNA, BacterialDNA PrimersFlow CytometryAmino Acid SequenceApoptosisCase-Control Studies