Cold atmospheric plasma disinfection of cut fruit surfaces contaminated with migrating microorganisms

Journal of Food Protection
Stefano PerniM G Kong

Abstract

The efficacy of cold atmospheric gas plasmas against Escherichia coli type 1, Saccharomyces cerevisiae, Gluconobacter liquefaciens, and Listeria monocytogenes Scott A was examined on inoculated membrane filters and inoculated fruit surfaces. Inoculated samples were exposed to a cold atmospheric plasma plume generated by an AC voltage of 8 kV at 30 kHz. The cold atmospheric plasma used in this study was very efficient in reducing the microbial load on the surfaces of filter membranes. However, its efficacy was markedly reduced for microorganisms on the cut surfaces. This lack of effect was not the result of quenching of reactive plasma species responsible for microbial inactivation but principally the result of the migration of microorganisms from the exterior of the fruit tissue to its interior. The velocity of migration through melon tissues was estimated to be around 300 microm min(-1) for E. coli and S. cerevisiae and through mango tissues to be 75 to 150 microm min(-1). These data can serve as operational targets for optimizing the performance of gas plasma inactivation processes. The current capabilities of cold atmospheric plasmas are reviewed and ways to improve their bactericidal efficacy are identified and discussed. C...Continue Reading

References

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Mar 11, 2008·Journal of Food Protection·Stefano PerniMichael G Kong

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Citations

Mar 14, 2013·Molecular Nutrition & Food Research·Oliver SchlüterGerhard Eisenbrand
Apr 25, 2018·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Yan SunShiqing Wang
Mar 18, 2015·Biointerphases·Alex ShawFelipe Iza
Feb 6, 2017·Journal of Applied Microbiology·C PignataG Gilli
May 6, 2017·International Journal of Environmental Research and Public Health·Xuewen JiangJiyoung Lee
May 9, 2012·Annual Review of Biomedical Engineering·N De Geyter, R Morent
Aug 18, 2021·Comprehensive Reviews in Food Science and Food Safety·Małgorzata NowackaEmilia Janiszewska-Turak
Aug 18, 2021·Food Research International·Abdullahi M AdamM S Roopesh
Dec 17, 2021·Comprehensive Reviews in Food Science and Food Safety·Nanna AbelJørgen Lerfall

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