Abstract

On the basis of the results of a numerical analysis in which 112 characters were used, strains ATCC 271T (T = type strain) and ATCC 4004, which were previously classified as Rhodococcus roseus by Tsukamura but were not included on the 1980 Approved Lists of Bacterial Names, were differentiated from all previously described species of the genus Rhodococcus. The mycolic acids of these strains contained 36 to 46 carbon atoms, and the number of double bonds was zero or one. The predominant menaquinone was MK-8(H2), and the moles percent guanine plus cytosine was 67.5. We propose that the species Rhodococcus roseus be revived as a new species of the genus Rhodococcus. The type strain is strain ATCC 271.

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