Contact-free cold atmospheric plasma treatment of Deinococcus radiodurans.

Journal of Industrial Microbiology & Biotechnology
Tim MaischJulia L Zimmermann

Abstract

In this study we investigated the sensitivity of Deinococcus radiodurans to contact-free cold atmospheric plasma treatment as part of a project to establish new efficient procedures for disinfection of inanimate surfaces. The Gram-positive D. radiodurans is one of the most resistant microorganisms worldwide. Stationary phases of D. radiodurans were exposed to cold atmospheric plasma for different time intervals or to ultraviolet C (UVC) radiation at dose rates of 0.001-0.0656 J cm⁻², respectively. A methicillin-resistant Staphylococcus aureus strain (MRSA) served as control for Gram-positive bacteria. The surface microdischarge plasma technology was used for generation of cold atmospheric plasma. A plasma discharge was ignited using ambient air. Surprisingly, D. radiodurans was sensitive to the cold atmospheric plasma treatment in the same range as the MRSA strain. Survival of both bacteria decreased with increasing plasma exposure times up to 6 log₁₀ cycles (>99.999 %) within 20 s of plasma treatment. In contrast, UVC radiation of both bacteria demonstrated that D. radiodurans was more resistant to UVC treatment than MRSA. Cold atmospheric plasma seems to be a promising tool for industrial and clinical purposes where time-savi...Continue Reading

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Citations

May 21, 2014·Applied Microbiology and Biotechnology·Jan-Wilm Lackmann, Julia Elisabeth Bandow
Jan 30, 2013·Biotechnology and Bioengineering·S Reed PlimptonMartin Voskuil
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May 4, 2020·Journal of Industrial Microbiology & Biotechnology·Simeng ZhengJingjing Chen
Jul 30, 2021·Comprehensive Reviews in Food Science and Food Safety·Surabhi WasonJeyamkondan Subbiah

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