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Int J Syst Evol Microbiol 55 (2005), 853-858; DOI  10.1099/ijs.0.63327-0
© 2005 International Union of Microbiological Societies

Fastidiosipila sanguinis gen. nov., sp. nov., a new Gram-positive, coccus-shaped organism from human blood

Enevold Falsen1, Matthew D. Collins2, Christina Welinder-Olsson1, Yuli Song3, Sydney M. Finegold3,4 and Paul A. Lawson2

1 Culture Collection, Department of Clinical Bacteriology, University of Göteborg, Sweden
2 School of Food Biosciences, University of Reading, Reading, UK
3 Infectious Diseases Section, VA Medical Center, West Los Angeles, CA 90073, USA
4 Department of Medicine, UCLA School of Medicine, CA 90073, USA

Correspondence
Paul A. Lawson
p.a.lawson{at}reading.ac.uk

Phenotypic and phylogenetic studies were performed on two strains of an unidentified Gram-positive, fastidious, non-spore-forming, coccus-shaped bacterium recovered from human blood. The organism was catalase-negative and grew under strictly anaerobic conditions and in the presence of 2 and 6 % O2. Comparative 16S rRNA gene sequencing demonstrated that the unidentified bacterium was, phylogenetically, far removed from peptostreptococci and related Gram-positive coccus-shaped organisms, but exhibited a phylogenetic association with Clostridium rRNA cluster III [as defined by Collins et al., Int J Syst Bacteriol 44 (1994), 812–826]. Sequence divergence values of 15 % or more were observed between the unidentified bacterium and all other recognized species within this and related rRNA clostridial clusters. Treeing analysis showed that the unknown bacterium formed a deep line branching at the periphery of rRNA cluster III and represents a hitherto unknown genus within this supra-generic grouping. On the basis of both phylogenetic and phenotypic evidence, it is proposed that the unknown bacterium from blood be classified in a new genus, Fastidiosipila gen. nov., as Fastidiosipila sanguinis sp. nov. The type strain of Fastidiosipila sanguinis is CCUG 47711T (=CIP 108292T).

Published online ahead of print on 29 October 2004 as DOI 10.1099/ijs.0.63327-0.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain CCUG 47711T is AJ575187.






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