African Journal of
Bacteriology Research

  • Abbreviation: J. Bacteriol. Res.
  • Language: English
  • ISSN: 2006-9871
  • DOI: 10.5897/JBR
  • Start Year: 2009
  • Published Articles: 116

Full Length Research Paper

Effects of Mn2+ levels on the resistance properties of Bacillus cereus spores

  Lawrence A. Klobutcher1, Elena Gaidamakova2, Michael J. Daly2, Barbara Setlow1, and Peter Setlow1*  
  1Department of Molecular, Microbial and Structural Biology, University of Connecticut Health Center, Farmington, CT 06030-3305, USA. 2Department of Pathology, School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA.
Email: [email protected]

  •  Accepted: 03 January 2012
  •  Published: 31 January 2013



In some Bacillus species, manganese levels influence the resistance properties of spores. To determine if this was true for Bacillus cereus, bacteria were sporulated with different MnCl2 concentrations resulting in spores with 30-fold differences in core Mn2+ levels. Spores with different Mn2+ levels displayed no differences in resistance to dry heat, UV radiation, g-radiation, or hydrogen peroxide. However, spores with the lowest Mn2+ level were less resistant to wet heat. Overall, Mn2+levels were not a major factor in B. cereus spore resistance, and this suggests that this will also be true for the closely related B. anthracis spores.


Key words: Manganese (Mn2+), spores, spore resistance, g-radiation, Bacillus,Deinococcus.