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FEMS Immunol Med Microbiol. 1999 Jul;24(3):253-8.

Phylogenetic basis for a taxonomic dissection of the genus Clostridium.

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1
DSMZ-Deutsche Sammlung von Mikroorganismen und Zellkulturen, Braunschweig, Germany. erko@dsmz.de

Abstract

The 16S rDNA-based phylogenetic analysis of the genus Clostridium has been completed by determination of the phylogenetic position of the type strains of 15 species and two non-validated species. These strains are members of phylogenetic clusters I, III, IV, V, IX, XIVa and XVIII as defined previously by Collins et al. [Int. J. Syst. Bacteriol. 44 (1994) 812-826]. Members of the genus Clostridium span a large evolutionary distance and the genus is not a phylogenetically coherent taxon but is intermixed with members of different genera, exhibiting a combination of Clostridium- and non-Clostridium-type properties. Anaerobacter polyendosporus, Syntrophococcus sucromutans and Acetivibrio multivorans also cluster within the radiation of Clostridium species. Although several taxa have been described for former Clostridium species with distinct phenotypic properties, the majority of Clostridium species, which are not members of the core cluster I, can at present not be reclassified as long as taxon-specific, phenotypic properties are not available.

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