Reproducibility of ResultsPolymerase Chain ReactionSensitivity and SpecificityBacteriaTime FactorsGram-Negative BacteriaGram-Positive BacteriaBacteria, AnaerobicRNA, Ribosomal, 16SMolecular Sequence DataDNA, BacterialBacteria, AerobicBacterial ProteinsPhylogenyDNA, RibosomalEscherichia coliSequence Analysis, DNAWater MicrobiologyColony Count, MicrobialSoil MicrobiologyBacterial Physiological PhenomenaGram-Negative Aerobic BacteriaGram-Negative Anaerobic BacteriaAnti-Bacterial AgentsRNA, BacterialTandem Mass SpectrometrySeawaterChromatography, LiquidCulture MediaGenes, BacterialSulfur-Reducing BacteriaGene Expression Regulation, BacterialAmino Acid SequenceReference StandardsLimit of DetectionBase SequenceMass SpectrometryChromatography, High Pressure LiquidGenes, rRNASpecies SpecificitySymbiosisGenome, BacterialAnaerobiosisCalibrationBiodegradation, EnvironmentalBase CompositionFresh WaterBacterial AdhesionPseudomonasBacteriological TechniquesEnterobacteriaceaeGeologic SedimentsBiofilmsBacterial LoadMicrobial Sensitivity TestsFermentationGammaproteobacteriaBacterial InfectionsBacteroidesTemperatureAerobiosisPseudomonas aeruginosaBacterial Typing TechniquesProteobacteriaFecesOxidation-ReductionIsotope LabelingHydrogen-Ion ConcentrationStaphylococcus aureusAlgorithmsDNA PrimersMicrobial ViabilityImage Processing, Computer-AssistedMutationVibrioPlasmidsModels, BiologicalStreptococcusFatty AcidsBetaproteobacteriaSpectrometry, Mass, Electrospray IonizationVirulenceCloning, MolecularArchaeaGas Chromatography-Mass SpectrometryCytophagaFungiImage Interpretation, Computer-AssistedBacillusReal-Time Polymerase Chain ReactionProteomicsEnvironmental MicrobiologyOrganic ChemicalsKineticsSalmonella typhimuriumReverse Transcriptase Polymerase Chain ReactionAir MicrobiologyPhenotypeIntestinesSequence Homology, Amino Acid