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Journal of Clinical Microbiology, February 2008, p. 638-643, Vol. 46, No. 2
0095-1137/08/$08.00+0     doi:10.1128/JCM.01491-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.

Comprehensive Study of Corynebacterium freneyi Strains and Extended and Emended Description of Corynebacterium freneyi Renaud, Aubel, Riegel, Meugnier, and Bollet 2001{triangledown}

Guido Funke* and Reinhard Frodl

Department of Medical Microbiology and Hygiene, Gärtner & Colleagues Laboratories, Ravensburg, Germany

Received 25 July 2007/ Returned for modification 30 September 2007/ Accepted 4 December 2007

In 2001, Corynebacterium freneyi was described as a new fermentative, {alpha}-glucosidase-positive Corynebacterium species related to C. xerosis based on data from three strains. During a review of our extensive culture collection we encountered 18 additional C. freneyi strains and further characterized them in detail. Thirteen of the 18 strains were isolated from female genital tract specimens without any obvious disease association. Phenotypically, C. freneyi can be easily differentiated from C. xerosis by its distinct wrinkled colonies whereas nearly all other routinely applied phenotypic tests do not allow a unanimous separation of C. freneyi from C. xerosis. Restriction length polymorphism analysis using CfoI of the 16S-23S rRNA gene intragenic spacer definitively allows differentiation between the two species. Surprisingly, comparative 16S rRNA gene analysis does not discriminate between C. freneyi and C. xerosis because the designated type strain of C. freneyi is not the most representative strain for this species. The present report also includes detailed data on the antimicrobial susceptibility pattern of C. freneyi presented here for the first time. Based on the large number of additional C. freneyi strains from our culture collection, we provide an extended and emended species description of C. freneyi.

* Corresponding author. Mailing address: Department of Medical Microbiology and Hygiene, Gärtner & Colleagues Laboratories, Elisabethenstrasse 11, D-88212 Ravensburg, Germany. Phone: 49-751-502-230. Fax: 49-751-502-385. E-mail: ldg.funke{at}t-online.de

{triangledown} Published ahead of print on 12 December 2007.

Journal of Clinical Microbiology, February 2008, p. 638-643, Vol. 46, No. 2
0095-1137/08/$08.00+0     doi:10.1128/JCM.01491-07
Copyright © 2008, American Society for Microbiology. All Rights Reserved.



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