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Multifactorial resistance of Bacillus subtilis spores to low-pressure plasma sterilization

Authors
  • Muratov, Erika
  • Rosenbaum, Florian P.
  • Fuchs, Felix M.
  • Ulrich, Nikea J.
  • Awakowicz, Peter
  • Setlow, Peter
  • Moeller, Ralf
Type
Published Article
Journal
Applied and Environmental Microbiology
Publisher
American Society for Microbiology
Publication Date
Dec 19, 2023
Volume
90
Issue
1
Identifiers
DOI: 10.1128/aem.01329-23
Source
ASM Journals
Keywords
License
Yellow

Abstract

Surface-associated contamination by endospore-forming bacteria poses a major challenge in sterilization, since the omnipresence of these highly resistant spores throughout nature makes contamination unavoidable, especially in unprocessed foods. Common bactericidal agents such as heat, UV and γ radiation, and toxic chemicals such as strong oxidizers: (i) are often not sufficient to completely inactivate spores; (ii) can pose risks to the applicant; or (iii) can cause unintended damage to the materials to be sterilized. Cold low-pressure plasma (LPP) has been proposed as an additional method for spore eradication. However, efficient use of LPP in decontamination requires understanding of spores’ mechanisms of resistance to and protection against LPP.

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