%0 Journal Article %A Hatayama, Kouta %A Kuno, Teruaki %T Spirosoma fluviale sp. nov., isolated from river water %D 2015 %J International Journal of Systematic and Evolutionary Microbiology, %V 65 %N Pt_10 %P 3447-3450 %@ 1466-5034 %R https://doi.org/10.1099/ijsem.0.000433 %I Microbiology Society, %X A bacterial strain, designated MSd3T, was isolated from a freshwater sample collected from the Hosoda River in Japan. The cells of strain MSd3T were Gram-stain-negative, non-spore-forming, aerobic, non-motile, curved rods forming rings, coils and undulating filaments. The 16S rRNA gene sequence of strain MSd3T showed closest similarity to that of Spirosoma linguale DSM 74T (97.6 % similarity) and similarity to other members of the genus Spirosoma ranged from 90.3 to 95.9 %. Strain MSd3T contained menaquinone 7 as the sole respiratory quinone. The major cellular fatty acids were summed feature 3 (C16 : 1ω6c and/or C16 : 1ω7c) and C16 : 1ω5c. The polar lipids were phosphatidylethanolamine, three unidentified aminophospholipids and three unidentified polar lipids. The DNA G+C content was 53.3 mol%. The DNA–DNA relatedness between strain MSd3T and S. linguale DSM 74T was 19 % or 25 % (reciprocal value). From the chemotaxonomic and physiological data and the levels of DNA–DNA relatedness, strain MSd3T should be classified as the representative of a novel species of the genus Spirosoma, for which the name Spirosoma fluviale sp. nov. (type strain MSd3T = JCM 30659T = DSM 29961T) is proposed. %U https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/ijsem.0.000433