Disease ReservoirsBacteriaGram-Negative BacteriaGram-Positive BacteriaBacteria, AnaerobicRNA, Ribosomal, 16SPhylogenyDNA, BacterialMolecular Sequence DataBacterial ProteinsBacteria, AerobicWater MicrobiologySequence Analysis, DNADNA, RibosomalEscherichia coliFresh WaterAnti-Bacterial AgentsBacterial Physiological PhenomenaSoil MicrobiologyGram-Negative Aerobic BacteriaColony Count, MicrobialGram-Negative Anaerobic BacteriaGenes, BacterialSeawaterRNA, BacterialCulture MediaSulfur-Reducing BacteriaGene Expression Regulation, BacterialSpecies SpecificityGenes, rRNAGenome, BacterialAnaerobiosisBase SequenceGeologic SedimentsSymbiosisBiodegradation, EnvironmentalAmino Acid SequencePolymerase Chain ReactionBase CompositionEnterobacteriaceaeBacterial AdhesionFecesBacterial Typing TechniquesPseudomonasMicrobial Sensitivity TestsZoonosesRodentiaBiofilmsBacteriological TechniquesPhytoplanktonProteobacteriaAnimals, WildEutrophicationBacterial InfectionsEcosystemRiversGammaproteobacteriaFermentationAerobiosisPseudomonas aeruginosaBacteroidesStaphylococcus aureusBiodiversityVirulenceMicrobial ViabilityPetroleumEnvironmental MicrobiologyBetaproteobacteriaTemperatureCladoceraVirus LatencyWater SupplyStreptococcusVibrioArchaeaPlasmidsHydrogen-Ion ConcentrationSeasonsFood MicrobiologyCloning, MolecularFatty AcidsMutationRodent DiseasesCytophagaBacillusDrug Resistance, BacterialSalmonella typhimuriumOxidation-ReductionFungiHost-Pathogen InteractionsCluster AnalysisZooplanktonGram-Negative Bacterial InfectionsAntibiosisMouthGene Transfer, HorizontalSequence Homology, Amino AcidBacterial LoadGastrointestinal TractBrazil