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Reclassification of Clostridium coccoides, Ruminococcus hansenii, Ruminococcus hydrogenotrophicus, Ruminococcus luti, Ruminococcus productus and Ruminococcus schinkii as Blautia coccoides gen. nov., comb. nov., Blautia hansenii comb. nov., Blautia hydrogenotrophica comb. nov., Blautia luti comb. nov., Blautia producta comb. nov., Blautia schinkii comb. nov. and description of Blautia wexlerae sp. nov., isolated from human faeces.

TLDR
Phenotypic and phylogenetic studies were performed on 15 isolates of an unidentified Gram-positive, anaerobic, non-sporulating coccobacillus-shaped bacterium isolated from human faeces, and it is suggested that a novel genus, Blautia gen. nov., is proposed.
Abstract
Phenotypic and phylogenetic studies were performed on 15 isolates of an unidentified Gram-positive, anaerobic, non-sporulating coccobacillus-shaped bacterium isolated from human faeces. The novel organisms were catalase-negative, indole-negative and produced acetate and succinate as end products of metabolism. Comparative 16S rRNA gene sequencing demonstrated that the 15 isolates were highly related to each other and formed a hitherto unknown subline within the clostridial rRNA cluster XIVa. The novel isolates formed a robust phylogenetic group with a number of organisms which included Clostridium coccoides, Ruminococcus luti, Ruminococcus obeum and a number of other misclassified ruminococci. On the basis of these studies, a novel genus, Blautia gen. nov., is proposed. It is suggested that Clostridium coccoides, Ruminococcus hansenii, Ruminococcus hydrogenotrophicus, Ruminococcus luti, Ruminococcus productus, and Ruminococcus schinkii are transferred to this genus as Blautia coccoides gen. nov., comb. nov., Blautia hansenii comb. nov., Blautia hydrogenotrophica comb. nov., Blautia luti comb. nov., Blautia producta comb. nov. and Blautia schinkii comb. nov. One of the new isolates, the hitherto unknown coccus-shaped bacterial strain WAL 14507T (=ATCC BAA-1564T=DSM 19850T) is proposed as representing the type strain of a novel species, Blautia wexlerae sp. nov.

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Global and Deep Molecular Analysis of Microbiota Signatures in Fecal Samples From Patients With Irritable Bowel Syndrome

TL;DR: Global and deep molecular analysis of fecal samples indicates that patients with IBS have a different composition of microbiota, and correlation analysis of the microbial groups indicated the involvement of several groups of Firmicutes and Proteobacteria in the pathogenesis of IBS.
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The first 1000 cultured species of the human gastrointestinal microbiota

TL;DR: This review provides a systematic overview and detailed references of the total of 1057 intestinal species of Eukarya, Archaea and Bacteria based on the phylogenetic framework of their small subunit ribosomal RNA gene sequences and unifies knowledge about the prevalence, abundance, stability, physiology, genetics and the association with human health of these gastrointestinal microorganisms.
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Phylogenetic distribution of three pathways for propionate production within the human gut microbiota

TL;DR: A better understanding of the microbial ecology of short-chain fatty acid formation may allow modulation of propionate formation by the human gut microbiota.
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Bile acid is a host factor that regulates the composition of the cecal microbiota in rats

TL;DR: Cholic acid regulates the composition of gut microbiota in rats, inducing similar changes to those induced by high-fat diets, and these findings improve the understanding of the relationship between metabolic diseases andThe composition of the gastrointestinal microbiota.
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Macronutrient metabolism by the human gut microbiome: major fermentation by-products and their impact on host health

TL;DR: Current knowledge of how macronutrient metabolism by the gut microbiome influences human health is summarized and knowledge gaps that could contribute to the understanding of overall human wellness will be identified.
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