BacteriaGram-Negative BacteriaGram-Positive BacteriaBacteria, AnaerobicBacteria, AerobicRNA, Ribosomal, 16SDNA, BacterialMolecular Sequence DataPhylogenyBacterial ProteinsEscherichia coliDNA, RibosomalAnti-Bacterial AgentsSequence Analysis, DNAWater MicrobiologyFecesGram-Negative Aerobic BacteriaColony Count, MicrobialBacterial Physiological PhenomenaGram-Negative Anaerobic BacteriaAnaerobiosisSoil MicrobiologyCulture MediaGerm-Free LifeIntestinesRNA, BacterialGenes, BacterialStreptococcusSeawaterBacteriological TechniquesSulfur-Reducing BacteriaSpecies SpecificityGene Expression Regulation, BacterialSymbiosisBacterial InfectionsGenes, rRNAPseudomonasAerobiosisGenome, BacterialClostridiumBacterial AdhesionBase CompositionAmino Acid SequenceMouthBiodegradation, EnvironmentalGastrointestinal TractMicrobial Sensitivity TestsAntibiosisBase SequenceCecumStaphylococcusBifidobacteriumFermentationEnterobacteriaceaeLactobacillusVaginosis, BacterialBiofilmsFusobacteriumFresh WaterBacterial Typing TechniquesBacteroidaceaePseudomonas aeruginosaProteobacteriaGeologic SedimentsStaphylococcus aureusVaginaGammaproteobacteriaPeptostreptococcusCorynebacteriumFungiProbioticsFood MicrobiologyBacteroidesVibrioHydrogen-Ion ConcentrationBacillusDigestive SystemPolymerase Chain ReactionMicrobial ViabilityDrug Resistance, MicrobialGram-Negative Bacterial InfectionsVirulenceKlebsiellaMetagenomeBetaproteobacteriaTemperatureFatty AcidsEcosystemCytophagaSalmonella typhimuriumProteusOxidation-ReductionPlasmidsDental PlaqueActinobacteriaGram-Positive CocciMutationCloning, MolecularDrug Resistance, BacterialIntestinal Mucosa