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Lactobacillus curvatus subsp. melibiosus is a later synonym of Lactobacillus sakei subsp. carnosus

¹ Department of Food and Environmental Hygiene, Faculty of Veterinary Medicine, University of Helsinki, 00014 Helsinki, Finland
² Laboratory of Microbiology, University of Ghent, 9000 Ghent, Belgium
³ Institute for Hygiene and Toxicology, Federal Research Centre for Nutrition, 76131 Karlsruhe, Germany

Correspondence
Joanna Koort
joanna.koort{at}helsinki.fi

On the basis of phenotypic and DNA–DNA reassociation studies, strain CCUG 34545^T has been considered to represent a distinct Lactobacillus curvatus subspecies, Lactobacillus curvatus subsp. melibiosus. However, in several independent studies dealing with Lactobacillus sakei and L. curvatus strains, the subspecies division of L. curvatus has been found to be controversial. The original study distinguishing the two subspecies within both L. curvatus and L. sakei also lacked 16S rRNA gene sequence analyses. Therefore, the taxonomic position of L. curvatus subsp. melibiosus CCUG 34545^T was re-evaluated in a polyphasic taxonomy study that included 16S rRNA gene sequence analysis, DNA–DNA reassociation, DNA G+C content determination, numerical analysis of ribotypes and whole-cell protein patterns and the examination of some fundamental phenotypic properties. The results obtained indicate that strain CCUG 34545^T and its duplicate, CCUG 41580^T, are Lactobacillus sakei subsp. carnosus strains and that L. curvatus subsp. melibiosus is a later synonym of L. sakei subsp. carnosus.

Published online ahead of print on 19 March 2004 as DOI 10.1099/ijs.0.63164-0.

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences obtained in this study are AY204889–AY204898.

Dendrograms and banding patterns associated with EcoRI and HindIII ribotypes and a dendrogram obtained by combining the equally weighted pattern information of both EcoRI and HindIII ribotypes into one numerical analysis are available, together with the complete DNA–DNA reassociation results, as supplementary material in IJSEM Online.

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