Inactivation Effects of Non-Thermal Atmospheric-Pressure Helium Plasma Jet on Staphylococcus aureus Biofilms

被引：61

作者：

Xu, Zimu ^{[1
,2
]}

Shen, Jie ^{[3
]}

Zhang, Zelong ^{[1
]}

Ma, Jie ^{[4
]}

Ma, Ronghua ^{[2
]}

Zhao, Ying ^{[3
]}

Sun, Qiang ^{[1
]}

Qian, Shulou ^{[1
]}

Zhang, Hao ^{[2
]}

Ding, Lili ^{[2
]}

Cheng, Cheng ^{[3
,4
,5
]}

Chu, Paul K. ^{[5
]}

Xia, Weidong ^{[1
,2
,4
]}

机构：

[1] Univ Sci & Technol China, Dept Thermal Sci & Energy Engn, Hefei 230026, Anhui, Peoples R China

[2] Univ Sci & Technol China, Sch Life Sci, Hefei 230026, Anhui, Peoples R China

[3] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China

[4] Chinese Acad Sci, Hefei Inst Phys Sci, Ctr Med Phys & Technol, Hefei 230031, Peoples R China

[5] City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China

来源：

PLASMA PROCESSES AND POLYMERS | 2015年 / 12卷 / 08期

基金：

中国国家自然科学基金;

关键词：

microbial biofilm; non-thermal plasma; plasma jet; reactive oxygen species; sterilization/decontamination; PSEUDOMONAS-AERUGINOSA; ANTIMICROBIAL EFFICACY; DISCHARGE PLASMA; REACTIVE OXYGEN; IN-VITRO; BACTERIA; DAMAGE;

D O I：

10.1002/ppap.201500006

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The antimicrobial effects and mechanism of helium atmospheric-pressure plasma jet (APPJ) treatment on Staphylococcus aureus biofilms are evaluated in vitro. The S. aureus biofilms are more resistant to the plasma treatment than adherent bacteria. The APPJ-treated S. aureus biofilms disclose a depth/layer-related intra-bacterial ROS accumulation effect. Plasma exposure may induce bacterial oxidative stress and trigger the production of intracellular reactive oxygen species (ROS) in the biofilms, which possibly contributes to bacteria death in addition to direct etching from the exterior of bacteria. The findings provide insights into the mechanism of biofilm inactivation by plasma reactive species and plasma-induced intracellular ROS.

引用

页码：827 / 835

页数：9

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