RT Journal Article SR Electronic(1) A1 Eeckhaut, Venessa A1 Van Immerseel, Filip A1 Pasmans, Frank A1 De Brandt, Evie A1 Haesebrouck, Freddy A1 Ducatelle, Richard A1 Vandamme, PeterYR 2010 T1 Anaerostipes butyraticus sp. nov., an anaerobic, butyrate-producing bacterium from Clostridium cluster XIVa isolated from broiler chicken caecal content, and emended description of the genus Anaerostipes JF International Journal of Systematic and Evolutionary Microbiology, VO 60 IS 5 SP 1108 OP 1112 DO https://doi.org/10.1099/ijs.0.015289-0 PB Microbiology Society, SN 1466-5034, AB Four butyrate-producing isolates were obtained from the caecal content of a 4-week-old broiler chicken. The 16S rRNA gene sequences were determined and confirmed the close relatedness of the four isolates, which suggested that they were derived from a single bacterial clone. Phylogenetic analysis based on 16S rRNA gene sequences showed that its closest relatives were members of cluster XIVa of the Clostridium subphylum of Gram-positive bacteria and that the closest related type strain was Anaerostipes caccae L1-92T (94.5 % similarity). Similarity levels of 96–98 % with sequences from uncultured bacteria from human stool samples were observed. On the basis of morphological, biochemical and phylogenetic characteristics, this strain is assigned to a novel species in the genus Anaerostipes, for which the name Anaerostipes butyraticus sp. nov. is proposed. The type strain is 35-7T (=LMG 24724T =DSM 22094T). An emended description of the genus Anaerostipes is also provided., UL https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/ijs.0.015289-0