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Int J Syst Evol Microbiol 54 (2004), 1753-1756; DOI  10.1099/ijs.0.63082-0
© 2004 International Union of Microbiological Societies

Streptococcus halichoeri sp. nov., isolated from grey seals (Halichoerus grypus)

Paul A. Lawson1, Geoffrey Foster2, Enevold Falsen3, Nick Davison4 and Matthew D. Collins1

1 School of Food Biosciences, University of Reading, Reading, UK
2 SAC Veterinary Services, Inverness, UK
3 Culture Collection, Department of Clinical Bacteriology, University of Göteborg, Sweden
4 VLA Truro, Polwhele, Truro, UK

Correspondence
Matthew D. Collins
m.d.collins{at}reading.ac.uk

Phenotypic and phylogenetic studies were performed on six unidentified, Gram-positive, catalase-negative, chain-forming Streptococcus-like organisms recovered from grey seals. Biochemically the six strains were highly related to each other, but they did not appear to correspond to any recognized species of the genus Streptococcus. Comparative 16S rRNA gene sequencing studies confirmed that phylogenetically the strains were members of the genus Streptococcus, but sequence divergence values of greater than 3 % compared with reference streptococcal species demonstrated that the organisms from seals represent a novel species. SDS-PAGE analysis of whole-cell proteins confirmed the phenotypic distinctiveness of the seal organisms. Based on biochemical criteria and molecular chemical and genetic evidence, it is proposed that the unknown organism from seals be classified as a novel species, Streptococcus halichoeri sp. nov., the type strain of which is CCUG 48324T (=CIP 108195T).

Abbreviations: CCUG, Culture Collection of the University of Göteborg, Sweden; CIP, Collection of Bacterial Strains of the Institute Pasteur, France

Published online ahead of print on 13 April 2004 as DOI 10.1099/ijs.0.63082-0.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain CCUG 48324T is AJ606046.




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