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Pseudobutyrivibrio ruminis gen. nov., sp. nov., a Butyrate-Producing Bacterium from the Rumen That Closely Resembles Butyrivibrio fibrisolvens in Phenotype

¹ Department of Animal Nutrition and Management, Swedish University of Agricultural Sciences, Kungsängen Research Centre, S-75323 Uppsala, Sweden
² Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, D-38124 Braunschweig, Germany

^* Corresponding author. Mailing address: Department of Animal Nutrition and Management, Swedish University of Agricultural Sciences, Kungsängen Research Centre, S-75323 Uppsala, Sweden. Fax: (46) 18 67 29 46.

ABSTRACT

A gram-negative, anaerobic, non-spore-forming bacterium which is a curved rod and motile by means of a single polar or subpolar flagellum was isolated from the rumen of a cow on pasture. The bacterium fermented a range of carbohydrates. Glucose was fermented to formate, butyrate, and lactate. The composition of cellular fatty acids was determined. The DNA base composition was 40 to 41 mol% G+C. The complete 16S rRNA sequence (EMBL accession number, X95893) was obtained, and the phylogenetic relationships were determined. The most closely related taxa were Roseburia cecicola, Eubacterium rectale, and Lachnospira pectinoschiza. The name proposed for this bacterium is Pseudobutyrivibrio ruminis gen. nov., the type strain is A12-1 (DSM 9787).

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