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Cloacibacterium caeni sp. nov., isolated from activated sludge
- Authors: Byung Hee Chun1, Yunhee Lee2, Hyun Mi Jin3, Che Ok Jeon4
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1 1Chung-Ang University 2 2Chung-Ang University 3 3Nakdonggang National Institute of Biological Resources 4 4Chung-Ang University
- First Published Online: 01 February 2017, International Journal of Systematic and Evolutionary Microbiology doi: 10.1099/ijsem.0.001841
- Issue Published:
A Gram-stain-negative, facultative anaerobic bacterium, designated B6T, was isolated from activated sludge of a wastewater treatment plant in South Korea. Cells were oxidase- and catalase-positive and non-motile rods producing yellow carotenoid-type pigments. Growth of strain B6T was observed at 20-40 C (optimum, 37 C) and pH 6.6-8.2 (optimum, pH 7.0) and in R2A broth supplemented with 0-1 % (w/v) NaCl (optimum, 0 %). Strain B6T contained iso-C15:0 as the major fatty acid. Menaquinone-6 was detected as the sole respiratory quinone. The G+C content of the genomic DNA in strain B6T was 31.5 mol%. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain B6T formed a tight phylogenic lineage with members of the genus Cloacibacterium. Strain B6T was most closely related to Cloacibacterium rupense R2A-16T (99.0 %), Cloacibacterium normanense NRS1T (98.7 %) and Cloacibacterium haliotis WB5T (97.4 %), but their DNA-DNA related levels were less than 42.0 %. On the basis of phenotypic, chemotaxonomic and molecular properties, it is clear that strain B6T represents a novel species of the genus Cloacibacterium, for which the name Cloacibacterium caeni sp. nov. is proposed. The type strain is B6T (=KACC 18988T =JCM 31714T).
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