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Journal of Clinical Microbiology, July 1998, p. 1902-1906, Vol. 36, No. 7
0095-1137/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.

Identification and Molecular Characterization of Beta-Hemolytic Streptococci Isolated from Harbor Porpoises (Phocoena phocoena) of the North and Baltic Seas

M. Swenshon,1 C. Lämmler,1,* and U. Siebert2

Institut für Bakteriologie und Immunologie der Justus-Liebig-Universität Gießen, Gießen,1 and Forschungs- und Technologiezentrum Westküste, Christian-Albrechts Universität Kiel, Büsum,2 Germany

Received 23 October 1997/Returned for modification 30 January 1998/Accepted 26 March 1998

The present study was designed to identify and comparatively investigate 35 beta-hemolytic streptococci isolated from stranded harbor porpoises or from animals caught in fishing nets of the North and Baltic seas. According to biochemical and serological data and to lectin agglutination tests with the lectin of Arachis hypogaea, all 35 isolates could be classified in Lancefield's serological group L and could be identified as Streptococcus dysgalactiae subsp. dysgalactiae. All 35 group L streptococci were uniformly sensitive to most of the antibiotics tested. To further analyze the epidemiological relationship, the isolates were subjected to macrorestriction analysis of their chromosomal DNA by pulsed-field gel electrophoresis. Digestion of the chromosomal DNA with the restriction enzymes SmaI and ApaI revealed that most of the group L streptococci seemed to be apparently identical or related. These results indicate that one clone or at least related group L streptococcal clones play an important role for infections of harbor porpoises of the North and Baltic seas. This might possibly be caused by a direct transfer of the bacteria from animal to animal.

* Corresponding author. Mailing address: Institut für Bakteriologie und Immunologie, Justus-Liebig-Universität Gießen, Frankfurter Straße 107, D-35392 Gießen, Germany. Phone: 49-641-99-38383. Fax: 49-641-99-38389. E-mail: Christoph.Laemmler{at}vetmed.uni-giessen.de.

Journal of Clinical Microbiology, July 1998, p. 1902-1906, Vol. 36, No. 7
0095-1137/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.


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