Shiga ToxinsEscherichia coli ProteinsEscherichia coli O157Escherichia coli InfectionsHemolytic-Uremic SyndromeEscherichia coliShiga ToxinShiga Toxin 2Shiga Toxin 1Genes, BacterialShiga-Toxigenic Escherichia coliBacterial ProteinsDNA, BacterialFecesMolecular Sequence DataBacterial ToxinsFood MicrobiologyBase SequencePlasmidsEscherichia coli K12Amino Acid SequenceO AntigensBacterial SheddingCloning, MolecularDiarrheaMutationGene Expression Regulation, BacterialCattle DiseasesAdhesins, Escherichia coliColony Count, MicrobialCattleEnterohemorrhagic Escherichia coliBacterial AdhesionVirulenceDisease Outbreaks