Salmonella arizonaeSalmonellaSalmonella entericaSalmonella Infections, AnimalSalmonella InfectionsSalmonella paratyphi CSwine DiseasesSwineAcids, AcyclicHafnia alveiParatyphoid FeverSerotypingLeukemic InfiltrationSalmonella typhimuriumSalmonella VaccinesVirulenceDNA FingerprintingTaiwanSalmonella enteritidisCyclic AMP Receptor ProteinBacterial VaccinesVaccines, AttenuatedMesenteryActinobacillus InfectionsEpidemiologic StudiesIleumCiprofloxacinPlasmidsDisease ReservoirsRNA, BacterialAnti-Infective AgentsAntibodies, BacterialBacterial Typing TechniquesSpecific Pathogen-Free OrganismsSpecies SpecificityColony Count, MicrobialGenes, BacterialMice, Inbred BALB CAnti-Bacterial AgentsDrug Resistance, BacterialBacteremiaIntestinal MucosaPolymerase Chain ReactionMicrobial Sensitivity TestsDNA ProbesMutationBacterial ProteinsFluoroquinolonesElectrophoresis, Gel, Pulsed-FieldPolymorphism, Restriction Fragment LengthDNA, BacterialFecesMicroscopy, Electron, ScanningGenome, BacterialLymph NodesEscherichia coliGene Expression Regulation, BacterialMicroscopy, Electron