Two strains that were strongly able to degrade trichloroethylene were isolated from contaminated environmental samples. The isolates are non-motile, aerobic, non-spore-forming, gram-positive coccoid to short rods with cell-wall peptidoglycan containing meso-diaminopimelic acid. The major type of menaquinone is MK-8(H4). The polar lipids were diphosphatidylglycerol, phosphatidylglycerol and phosphatidylinositol. Mycolic acids were absent. The G+C content of the DNA was 72 mol%. Furthermore, comparison of 16S rDNA sequences shows that the isolates clearly belong to the genus Janibacter. The isolates differ from Janibacter limosus at the species level, as shown by the value for DNA-DNA hybridization. It is therefore proposed that the strains be assigned to the genus Janibacter as Janibacter brevis sp. nov.


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