Cold plasma for sustainable control of hygienically relevant biofilms : the interaction of plasma distance and exposure time

Dahle, Sebastian (author), Žigon, Jure (author), Fink, Rok (author)

This study aimed to analyse the efficacy of a new cold plasma device adapted for treatment with a low power consumption. We tested the reduction of bacterial cells in biofilms of E. coli, S. aureus and P. aeruginosa. The results show significant differences between bacterial cells, suggesting that Gramme-positive S. aureus is less susceptible to plasma treatment than Gramme-negative E. coli and P. aeruginosa. Increasing the exposure time and decreasing the distance decreases the number of cells in the biofilm. However, the combination of close distance and long exposure time resulted in synergistic effects. We demonstrated a reduction of up to 6.6 log CFU cm$^2$ for E. coli at 1 mm and an exposure time of 60 seconds. All these indicate that the new cold plasma jet device can be an important key to ensuring hygiene and numerous applications in medicine and engineering are possible.

• Language: English
• Keywords: cold plasma, biofilms, bacterial reduction, treatment time and distance
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: BF - Biotechnical Faculty; ZF - Faculty of Health Sciences
• Publication status: Published
• Publication version: Version of Record
• Year: 2024
• Number of pages: Str. 340–354
• Numbering: Vol. 34, no. 1
• PID: 20.500.12556/RUL-154083
• UDC: 613
• ISSN on article: 1369-1619
• DOI: 10.1080/09603123.2022.2149710
• COBISS.SI-ID: 131261699
• Publication date in RUL: 24.01.2024

Record is a part of a journal

• Title: International journal of environmental health research
• Shortened title: Int. j. environ. health res.
• Publisher: Taylor and Francis, Carfax
• ISSN: 1369-1619
• COBISS.SI-ID: 521341209

Licences

• License: CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
• Link: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Description: The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.

Secondary language

• Language: Slovenian
• Keywords: hladna plazma, biofilmi, redukcija bakterij, čas obdelave in razdalja

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P4-0015
• Name: Les in lignocelulozni kompoziti

• Funder: ARRS - Slovenian Research Agency
• Project number: P4-0430
• Name: Gozdno-lesna veriga in podnebne spremembe: prehod v krožno biogospodarstvo