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Int J Syst Bacteriol. 1996 Oct;46(4):1083-7.

Phylogenetic relationships of the genera Acetobacterium and Eubacterium sensu stricto and reclassification of Eubacterium alactolyticum as Pseudoramibacter alactolyticus gen. nov., comb. nov.

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Department of Microbiology, Reading Laboratory, United Kingdom.


16S rRNA gene sequences of the type strains of the seven previously described Acetobacterium species were determined. The Acetobacterium species were found to form a tight phylogenetic cluster within the Clostridium subphylum of the gram-positive bacteria. Within this subphylum these organisms belong to cluster XV as defined by Collins et al. (M.D. Collins, P.A. Lawson, A. Willems, J.J. Cordoba, J. Fernandez-Garayzabal, P. Garcia, J. Cai, H. Hippe, and J. A. E. Farrow, Int. J. Syst. Bacteriol. 44:812-826, 1994) together with Eubacterium alactolyticum barkeri, Eubacterium callanderi, and Eubacterium limosum. Our data indicate that Clostridium cluster XV consists of at least the following three genera: the genus Acetobacterium, the genus Eubacterium sensu stricto (comprising E. limosum, E. barkeri, and E. callanderi), and the genus Pseudoramibacter gen. nov., which is created for E. alactolyticum, which we reclassify as Pseudoramibacter alactolyticus comb. nov.

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