CattleSequence Analysis, DNASpecies SpecificityRNA, Ribosomal, 16SMice, Inbred StrainsDNA, RibosomalBacterial Typing TechniquesEscherichia coliVirulenceGenes, BacterialMutationCulture MediaAnti-Bacterial AgentsMicrobial Sensitivity TestsDNA, BacterialSerotypingPhenotypeBase CompositionPolymerase Chain ReactionPlasmidsAmino Acid SequenceGenes, rRNADrug Resistance, MicrobialGenotypeMolecular Sequence DataGenome, BacterialNucleic Acid HybridizationSoil MicrobiologyGene Expression Regulation, BacterialFecesRNA, BacterialWeaningGenetic VariationEscherichia coli InfectionsCloning, MolecularDNA FingerprintingElectrophoresis, Gel, Pulsed-FieldFermentationFatty AcidsDiarrheaAntigens, BacterialCluster AnalysisBacterial ProteinsBacterial AdhesionAnimals, SucklingPolymorphism, Restriction Fragment LengthTemperatureStaphylococcus aureusCrosses, GeneticDrug Resistance, BacterialVirulence FactorsColostrumWater MicrobiologyAnimals, NewbornBacterial ToxinsAnimal HusbandryPhylogenySprains and StrainsBiodegradation, EnvironmentalPseudomonasBacterial Outer Membrane ProteinsDNA Transposable ElementsTime FactorsSequence Homology, Nucleic AcidEscherichia coli ProteinsGene DeletionActinomycetalesBreedingDNA PrimersChromosomes, BacterialColony Count, MicrobialSalmonella typhimuriumPseudomonas aeruginosaDisease OutbreaksConjugation, GeneticRecombination, GeneticSeawaterGenetic Complementation TestBase SequenceMolecular EpidemiologyPasteurella InfectionsFood MicrobiologyAntibodies, BacterialMice, Inbred BALB CMilkChromosome MappingSaccharomyces cerevisiaeRandom Amplified Polymorphic DNA TechniqueVaccines, AttenuatedStreptococcusMannheimia haemolyticaHydrogen-Ion ConcentrationAerobiosisElectrophoresis, Polyacrylamide GelBovine Virus Diarrhea-Mucosal DiseaseRestriction MappingAbomasumMutagenesis, InsertionalSwineSequence Homology, Amino Acid