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Actinomyces europaeus sp. nov., Isolated from Human Clinical Specimens

¹Department of Medical Microbiology, University of Zürich, CH-8028 Zürich, Switzerl
²Department of Microbiology, BBSRC Institute of Food Research, Reading Laboratory, Reading RG6 6BZ, United Kingdom
³Culture Collection, Department of Clinical Bacteriology, University of Göteborg, S-41346 Göteborg, Sweden
⁴Stichting Streeklaboratorium ‘Zeeland,’ NL-4460 AA Goes, The Netherlands
⁵National Institute of Public Health and Environmental Protection, NL-3720 BA Bilthoven, The Netherlands
⁶German Collection of Microorganisms and Cell Cultures, D-38124 Braunschweig, Germany

^* Corresponding author. Mailing address: Department of Medical Microbiology, University of Zürich, Gloriastrasse 32, CH-8028 Zürich, Switzerland. Phone: 41-1-257-2700. Fax: 41-1-252-8107. E-mail: funke{at}immv.unizh.ch.

ABSTRACT

Ten strains of a hitherto undescribed catalase-negative, facultatively anaerobic, coryneform bacterium were isolated or collected by workers at three European clinical bacteriology laboratories or reference centers. These strains were isolated from humans, and most came from abscess material. Biochemical and chemotaxonomic characterization revealed that the strains belonged to the genus Actinomyces. The phenotypic features of the 10 strains were incompatible with the descriptions of the previously established Actinomyces species. A comparative 16S rRNA gene sequence analysis demonstrated that the previously undescribed strains constitute a new line in the genus Actinomyces. The name Actinomyces europaeus sp. nov. is proposed for these clinical isolates. The type strain is CCUG 32789A.

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