International Journal of Systematic and Evolutionary Microbiology, Vol 50, 1767-1774, Copyright © 2000 by Society for General Microbiology

Emendation of genus Collinsella and proposal of Collinsella stercoris sp. nov. and Collinsella intestinalis sp. nov

A Kageyama and Y Benno
Japan Collection of Microorganisms, The Institute of Physical and Chemical Research (RIKEN), Wako, Saitama 351-0198, Japan

Collinsella aerofaciens-like strains isolated from human faeces were characterized by biochemical tests, cell wall murein analysis and 16S rDNA analysis. The results indicated that these strains are phylogenetically a member of the family Coriobacteriaceae and close to the genus Collinsella. Their phenotypic characters resembled those of Collinsella aerofaciens. Determination of DNA--DNA relatedness showed that these strains could be divided into two groups (groups 1 and 2). Collinsella aerofaciens and both new groups have A4-type cell wall murein. Based on their phenotypic and phylogenetic characters, two new species of the genus Collinsella are proposed for the isolated strains: Collinsella stercoris for group 1 and Collinsella intestinalis for group 2. Species-specific PCR primer sets for these two species were also constructed. Using these primer sets, Collinsella stercoris and Collinsella intestinalis can be identified easily and rapidly.

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