BacteriaGram-Negative BacteriaGram-Positive BacteriaBacteria, AnaerobicRNA, Ribosomal, 16SDNA, BacterialBacteria, AerobicMolecular Sequence DataPhylogenyBacterial ProteinsSoil MicrobiologyWater MicrobiologyEscherichia coliFungiDNA, RibosomalSequence Analysis, DNAColony Count, MicrobialBacterial Physiological PhenomenaBiodegradation, EnvironmentalAnti-Bacterial AgentsCulture MediaSeawaterAir MicrobiologyBacteriological TechniquesGram-Negative Anaerobic BacteriaAnaerobiosisGenes, BacterialGram-Negative Aerobic BacteriaRNA, BacterialFermentationPseudomonasSymbiosisBacterial InfectionsGene Expression Regulation, BacterialGenome, BacterialSulfur-Reducing BacteriaFresh WaterGeologic SedimentsBiofilmsSpecies SpecificityEnterobacteriaceaeGenes, rRNAMicrobial Sensitivity TestsAmino Acid SequenceBacterial AdhesionBase SequenceArchaeaAerobiosisStaphylococcus aureusEnvironmental MicrobiologyMicrobial ViabilityProteobacteriaPseudomonas aeruginosaBacteroidesMicrobiological TechniquesBase CompositionStreptococcusBacillusMouthHydrogen-Ion ConcentrationGammaproteobacteriaAnti-Infective AgentsTemperatureFood MicrobiologyBacterial Typing TechniquesPolymerase Chain ReactionStaphylococcusMetagenomeOxidation-ReductionCorynebacteriumActinobacteriaEukaryotaEcosystemGram-Negative Bacterial InfectionsRumenBetaproteobacteriaMethaneDeltaproteobacteriaMicrococcusFecesMicrobiologyBacterial LoadBiodiversityAntibiosisCloning, MolecularProbioticsVibrioClostridiumActinomycetalesVirulenceBacillus subtilisIntestinesFatty AcidsDisinfectionDental PlaqueActinomycesGastrointestinal TractPhagocytosisWaste Disposal, FluidMicroscopy, Electron, Scanning