Virucidal effect of cold atmospheric gaseous plasma on feline calicivirus, a surrogate for human norovirus

Applied and Environmental Microbiology
Hamada A AboubakrSagar M Goyal

Abstract

Minimal food-processing methods are not effective against foodborne viruses, such as human norovirus (NV). It is important, therefore, to explore novel nonthermal technologies for decontamination of foods eaten fresh, minimally processed and ready-to-eat foods, and food contact surfaces. We studied the in vitro virucidal activity of cold atmospheric gaseous plasma (CGP) against feline calicivirus (FCV), a surrogate of NV. Factors affecting the virucidal activity of CGP (a so-called radio frequency atmospheric pressure plasma jet) were the plasma generation power, the exposure time and distance, the plasma feed gas mixture, and the virus suspension medium. Exposure to 2.5-W argon (Ar) plasma caused a 5.55 log10 unit reduction in the FCV titer within 120 s. The reduction in the virus titer increased with increasing exposure time and decreasing exposure distance. Of the four plasma gas mixtures studied (Ar, Ar plus 1% O2, Ar plus 1% dry air, and Ar plus 0.27% water), Ar plus 1% O2 plasma treatment had the highest virucidal effect: more than 6.0 log10 units of the virus after 15 s of exposure. The lowest virus reduction was observed with Ar plus 0.27% water plasma treatment (5 log10 unit reduction after 120 s). The highest reductio...Continue Reading

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Citations

Oct 4, 2016·Journal of Medical Virology·M WeissM B Stope
Feb 25, 2018·Applied and Environmental Microbiology·Xia SuJing Fang
Jun 20, 2018·Applied and Environmental Microbiology·Li GuoMichael G Kong
Aug 16, 2016·Applied and Environmental Microbiology·Miyu FuzawaThanh H Nguyen
Mar 3, 2020·Frontiers in Plant Science·Bhawana AdhikariGyungsoon Park
Oct 30, 2020·Foods·Andreana Pexara, Alexander Govaris
Mar 16, 2021·Journal of Pharmaceutical Analysis·Lingge GaoXili Wu

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