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1Department of Medical Microbiology, University of Zurich, 8028 Zurich, Switzerland
2Department of Microbiology, BBSRC Institute of Food Research, Reading RG6 6BZ, UK
3Department of Laboratory Medicine, Microbiology Laboratory, Kantonsspital Basle, 4031 Basle, Switzerland
4Institut de Bactériologie, Faculté de Médecine, Université Louis Pasteur Hopitaux Universitaires, 67000 Strasbourg, France
5Tel: +41 1 634 2701. Fax: +41 1 634 4906. e-mail: funke{at}immv.unizh.ch
ABSTRACT
Three strains of a previously unknown coryneform bacterium were isolated from two patients with foot infections and from a blood culture of a third patient. The three non-lipophilic strains exhibited very slow fermentative acid production from glucose but not from maltose or sucrose, nitrate reductase activity, no tyrosinase activity and the presence of small amounts of tuberculostearic acid as the most significant phenotypic features. Differentiation of these strains from all other presently defined coryneform bacteria was readily achieved. Chemotaxonomic investigations revealed that the three strains unambiguously belonged to the genus Corynebacterium. Comparative 16S rRNA gene sequence analysis demonstrated that the isolates were almost identical and represented a new subline within the genus Corynebacterium, for which the designation Corynebacterium confusum sp. nov. is proposed. The type strain of Corynebacterium confusum is CCUG 38267T.
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