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Journal of Clinical Microbiology, December 1998, p. 3698-3702, Vol. 36, No. 12
0095-1137/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Differentiation of Corynebacterium amycolatum, C. minutissimum, and C. striatum by Carbon Substrate Assimilation Tests

François N. R. Renaud,1,2,* Marianne Dutaur,3 Salah Daoud,1 Dominique Aubel,2 Philippe Riegel,4 Daniel Monget,5 and Jean Freney1,3

DERBA UPRES EA 1655, Faculté de Médecine RTH Laennec, 69372 Lyon,1 Institut des Sciences Pharmaceutiques et Biologiques (ISPB), 69373 Lyon,3 IUT A Lyon 1, 69622 Villeurbanne Cedex,2 Institut de Bactériologie, Université Louis Pasteur, 67000 Strasbourg,4 and bioMérieux, 38390 La Balme les Grottes,5 France

Received 21 May 1998/Returned for modification 2 July 1998/Accepted 10 September 1998

We tested the carbon substrate assimilation patterns of 40 Corynebacterium amycolatum strains, 19 C. minutissimum strains, 50 C. striatum strains, and 1 C. xerosis strain with the Biotype 100 system (bioMérieux, Marcy-l'Étoile, France). Twelve carbon substrates of 99 allowed discrimination among the species tested. Additionally, assimilation of 3 of these 12 carbon substrates (maltose, N-acetyl-D-glucosamine, and phenylacetate) was tested with the API 20 NE identification system (bioMérieux). Since concordant results were observed with the two systems for these three carbon substrates, either identification system can be used as a supplementary tool to achieve phenotypic differential identification of C. amycolatum, C. minutissimum, and C. striatum in the clinical microbiology laboratory.

* Corresponding author. Mailing address: DERBA UPRES EA 1655, Faculté de Médecine RTH Laennec, Laboratoire de Bactériologie, rue Guillaume Paradin, 69372 Lyon Cedex 08, France. Phone: 33 4 78 77 86 57. Fax: 33 4 78 77 86 58. E-mail: renaud{at}cimac-res.univ-lyon1.fr.

Journal of Clinical Microbiology, December 1998, p. 3698-3702, Vol. 36, No. 12
0095-1137/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.


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