VirulenceBacterial ProteinsGene Expression Regulation, BacterialGenes, BacterialSequence Analysis, DNAMutationSpecies SpecificityMolecular Sequence DataEscherichia coliDNA, BacterialPlasmidsBacterial Typing TechniquesAmino Acid SequenceBacterial AdhesionGenome, BacterialRNA, Ribosomal, 16SGene DeletionSerotypingPhenotypeEscherichia coli InfectionsMice, Inbred StrainsDNA, RibosomalAnti-Bacterial AgentsBacterial ToxinsPolymerase Chain Reaction