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Journal of Clinical Microbiology, February 2006, p. 307-312, Vol. 44, No. 2
0095-1137/06/$08.00+0     doi:10.1128/JCM.44.2.307-312.2006
Copyright © 2006, American Society for Microbiology. All Rights Reserved.

Isolation of Corynebacterium tuscaniae sp. nov. from Blood Cultures of a Patient with Endocarditis

Philippe Riegel,^1, Roberta Creti,^2, Romano Mattei,³ Alfredo Nieri,⁴ and Christina von Hunolstein^2*

Institut de Bactériologie, Faculté de Médecine, Université Louis Pasteur, Hôpitaux Universitaires, 67000 Strasbourg, France,¹ Dipartimento di Malattie Infettive, Parassitarie ed Immunomediate, Istituto Superiore di Sanità, 00161 Rome, Italy,² Laboratorio Analisi Chimico-Cliniche e Microbiologiche, Ospedale Campo di Marte, 55100 Lucca, Italy,³ Dipartimento di Medicina Interna, Ospedale Campo di Marte, 55100 Lucca, Italy⁴

Received 9 May 2005/ Returned for modification 12 July 2005/ Accepted 28 October 2005

A strain of an unknown coryneform bacterium was repeatedly isolated in pure culture from the blood of a patient affected by endocarditis. Comparative 16S rRNA gene sequence analysis revealed that this isolate represented a new subline within the genus Corynebacterium. This new taxon can be identified by the presence of corynomycolic acids and its enzymatic activities and fermentation of sugars. Acid production from glucose and maltose, pyrazinamidase and alkaline phoshatase activities, and hippurate hydrolysis were the most characteristic phenotypic features of the bacterium. On the basis of both phenotypic and phylogenetic evidence, it is proposed that this isolate be classified as a novel species, Corynebacterium tuscaniae sp. nov. The type strain, ISS-5309, has been deposited in the American Type Culture Collection (ATCC BAA-1141) and in the Culture Collection of the University of Göteborg (CCUG 51321).

P.R. and R.C. contributed equally to this work.

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