Anaerofustis stercorihominis gen. nov., sp. nov., from human feces
2004
Abstract Phenotypic and phylogenetic studies were performed on an unidentified Gram-positive, strictly anaerobic, non-spore-forming, rod-shaped bacterium isolated from human feces. The organism was catalase-negative, resistant to 20% bile, produced acetic and butyric acids as end products of glucose metabolism, and possessed a G+C content of approximately 70 mol%. Comparative 16S rRNA gene sequencing demonstrated that the unidentified bacterium was a member of the Clostridium sub-phylum of the Gram-positive bacteria, and formed a loose association with rRNA cluster XV. Sequence divergence values of 12% or greater were observed between the unidentified bacterium and all other recognized species within this and related rRNA clusters. Treeing analysis showed the unknown anaerobe formed a deep line branching near to the base of rRNA cluster XV and phylogenetically represents a hitherto unknown taxon, distinct from Acetobacterium , Eubacterium sensu stricto, Pseudoramibacter and other related organisms. Based on both phylogenetic and phenotypic evidence, it is proposed that the unknown bacterium from feces be classified in a new genus Anaerofustis , as Anaerofustis stercorihominis sp. nov. The type strain of Anaerofustis stercorihominis is ATCC BAA-858 T =CCUG 47767 T .
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