Argon Humidification Exacerbates Antimicrobial and Anti-MRSA kINPen Plasma Activity

Area of Science:

• Medical technology
• Microbiology
• Plasma physics

Background:

• Medical gas plasma exhibits antimicrobial properties primarily through reactive oxygen species.
• Clinical application of gas plasma for bacterial reduction faces efficacy challenges.
• The specific reactive species profile of gas plasma jets influences antimicrobial effectiveness.

Purpose of the Study:

• To investigate the impact of various feed gas settings on the antimicrobial efficacy of gas plasma.
• To identify gas plasma conditions that maximize bacterial killing.
• To optimize medical gas plasma for enhanced clinical outcomes in wound management.

Main Methods:

• Screening of diverse feed gas compositions for gas plasma jets (kINPen).
• Antimicrobial efficacy assessed using single-cell analysis via flow cytometry.
• Validation of findings through inhibition zone analysis on microbial lawns.

Main Results:

• Humidified feed gas demonstrated significantly higher bacterial toxicity compared to dry argon.
• Several other gas plasma conditions showed varying levels of antimicrobial activity.
• Results were consistently observed across flow cytometry and agar plate assays.

Conclusions:

• Feed gas composition critically influences gas plasma's antimicrobial potency.
• Humidified gas plasma offers a promising strategy for enhanced bacterial eradication.
• Optimizing gas plasma settings has significant implications for improving clinical wound management and patient treatment outcomes.