Valid publication of the names Caecibacterium and Caecibacterium sporoformans.

Descriptions of the genus Caecibacterium and its proposed type species Caecibacterium sporoformans were published in the IJSEM by Onrust et al. (Int J Syst Evol Microbiol 2017;67:4589-4594). The type strain was deposited as LMG 27730 and DSM 26959.

Caecibacterium sporoformans gen. nov., sp. nov., an anaerobic, butyrate-producing, spore-forming bacterium isolated from chicken caecum.

Strains of a Gram-stain-negative, rod-shaped and immotile bacterium were isolated from broiler chicken caecal content. The isolates required strict anaerobic conditions for growth, formed spores, were catalase-positive and oxidase-negative. They produced butyrate as the major metabolic end product in reinforced clostridial medium broth.

Harryflintia acetispora gen. nov., sp. nov., isolated from chicken caecum.

More than 100 isolates of a Gram-stain-negative, curved rod-shaped, so far uncultured bacterium were isolated from chicken caecal content. The strains were obligate anaerobes which formed endospores. They were catalase-positive, cytochrome-oxidase-negative and did not hydrolyse aesculin.