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Archives of Microbiology

, Volume 182, Issue 1, pp 90–95 | Cite as

Anaerobiosis and low specific growth rates enhance hemolysin BL production by Bacillus cereus F4430/73

  • Catherine Duport
  • Séverine Thomassin
  • Gérald Bourel
  • Philippe Schmitt
Short Communication

Abstract

Bacillus cereus F4430/73 produced the highest levels of hemolysin BL (HBL) when grown under anaerobiosis in MOD medium. Anaerobic cells grown in a chemostat at low specific growth rate (0.1–0.2 h−1) expressed up to sevenfold more HBL than did cells held at a faster growth rate. At 0.2 h−1, the presence of 90 mM glucose resulted in inhibition of HBL production. Glucose was found to repress HBL induction at the mRNA level, indicating the potential involvement of catabolite repression in the regulation of HBL. Based on these data, it is suggested that growth rate could be an effector of catabolite regulation of HBL.

Keywords

Chemostat RT-PCR Bacillus cereus Enterotoxin Anaerobiosis Growth rate Glucose repression 

Notes

Acknowledgments

We would like to thank Dr R. Dietrich for kindly supplying the anti-L2 antibodies. This work was supported by the French Research Ministry Graduate Fellowship (S. Thomassin).

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Copyright information

© Springer-Verlag 2004

Authors and Affiliations

  • Catherine Duport
    • 1
  • Séverine Thomassin
    • 1
  • Gérald Bourel
    • 1
  • Philippe Schmitt
    • 1
  1. 1.UMR A408 Sécurité et Qualité des Produits d’Origine Végétale, INRA/Université d’AvignonAvignon cedex 9France

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