1887

Abstract

Two strains (RW43-9 and RW17-10) recovered from secondary treated wastewater from the Wastewater Treatment Plant (WWTP) in Reus (Spain) were characterized by a polyphasic taxonomic study, showing evidence that they represented two novel species. Based on the 16S rRNA gene for strain RW43-9, the closest relative was LMG 10828 (99.9 % similarity), while for strain RW17-10 it was CECT 7836 (99.4 %). Additionally, multilocus phylogenetic analysis of five concatenated housekeeping genes (, , , and ) showed that the two strains formed separate branches that are different from known species. Whole genome sequences of the two strains (RW43-9 and RW17-10) were obtained and they were compared with those of the type strains of their nearest species. Using average nucleotide identity and DNA–DNA hybridization gave values that were below 96 and 70 %, respectively. These results clearly confirm that they represent novel species. Additionally, the phenotypic characterization of the strains allowed their differentiation from other species. Therefore, the strains are proposed as representing two novel species with the names sp. nov. (type strain RW43-9=CECT 8994=LMG 29062) and sp. nov. (type strain RW17-10=CECT 9140=LMG 29151).

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2019-11-01
2020-01-29
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