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Journal of Clinical Microbiology, April 2007, p. 1274-1277, Vol. 45, No. 4
0095-1137/07/$08.00+0     doi:10.1128/JCM.02224-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.

A New Phylogenetic Cluster of Cereulide-Producing Bacillus cereus Strains{triangledown}

Maria Vassileva,1 Keizo Torii,1 Megumi Oshimoto,1 Akira Okamoto,1 Norio Agata,2 Keiko Yamada,1 Tadao Hasegawa,3 and Michio Ohta1*

Department of Bacteriology, Nagoya University Graduate School of Medicine, Nagoya, Japan,1 Nagoya City Public Health Research Institute, Nagoya, Japan,2 Department of Microbiology, Nagoya City University, Nagoya, Japan3

Received 31 October 2006/ Returned for modification 18 December 2006/ Accepted 8 February 2007

Phenotypic and molecular studies have established that cereulide-producing strains of Bacillus cereus are a distinct and probably recently emerged clone within the Bacillus population. We analyzed a set of B. cereus strains, both cereulide producers and nonproducers, by multilocus sequence typing. Consistent with earlier reports, nonproducers demonstrated high heterogeneity. Most cereulide-producing strains and all flagellar antigen type H1 strains were allocated to the known sequence type of exclusively emetic B. cereus strains. Several cereulide-producing strains, however, were recovered at a new phylogenetic location, all of which were serotype H3 or H12. We hypothesize that the group of cereulide producers is diversifying progressively, probably by lateral transfer of the corresponding gene complex.

* Corresponding author. Mailing address: Department of Bacteriology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan. Phone: 81-52-744 2106. Fax: 81-52-744 2107. E-mail: mohta{at}med.nagoya-u.ac.jp

{triangledown} Published ahead of print on 21 February 2007.

Journal of Clinical Microbiology, April 2007, p. 1274-1277, Vol. 45, No. 4
0095-1137/07/$08.00+0     doi:10.1128/JCM.02224-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

  • Tourasse, N. J., Kolsto, A.-B. (2008). SuperCAT: a supertree database for combined and integrative multilocus sequence typing analysis of the Bacillus cereus group of bacteria (including B. cereus, B. anthracis and B. thuringiensis). Nucleic Acids Res 36: D461-D468 [Abstract] [Full Text]  


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