Gammaproteobacteria Bacteria 12 Bacteria (microorganisms) 12 Betaproteobacteria 12 bacterium 12 Alphaproteobacteria 8 Argentina 8 RNA, Ribosomal, 16S 8 nonhuman 8 priority journal 8 Actinobacteria 6 Bacteroidetes 6 RNA 16S 6 Sewage 6 article 6 bacterium identification 6 genetics 6 microbiology 6 polymerase chain reaction 6 Acidobacteria 4 Activated sludge 4 Archaea 4 Article 4 Burkholderiales 4 CARD-FISH 4 DNA, Bacterial 4 DNA, Ribosomal 4 Ethylene Glycols 4 RNA 4 Soil Microbiology 4