A Gram-positive, aerobic, non-motile, endospore-forming rod, designated DS22(T), was isolated from a drinking-water treatment plant. Cells were catalase- and oxidase-positive. Growth occurred at 15-37 degrees C, at pH 7-10 and with <8% (w/v) NaCl (optimum growth: 30 degrees C, pH 7-8 and 1-3% NaCl). The major respiratory quinone was menaquinone 7, the G + C content of the genomic DNA was 36.5 mol% and the cell ...