Lethal and Sublethal Effect of a Dielectric Barrier Discharge Atmospheric Cold Plasma on Staphylococcus aureus

被引：53

作者：

Liao, Xinyu ^{[1
]}

Xiang, Qisen ^{[2
]}

Liu, Donghong ^{[1
]}

Chen, Shiguo ^{[1
]}

Ye, Xingqian ^{[1
]}

Ding, Tian ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Food Sci & Nutr, Zhejiang Key Lab Agrofood Proc, Hangzhou 310058, Zhejiang, Peoples R China

[2] Zhengzhou Univ Light Ind, Coll Food & Biol Engn, Zhengzhou 450002, Peoples R China

来源：

JOURNAL OF FOOD PROTECTION | 2017年 / 80卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Cold plasma; Staphylococcus aureus; Sublethal injury; ENTERICA SEROVAR TYPHIMURIUM; ESCHERICHIA-COLI; SALMONELLA-ENTERICA; MICROBIAL INACTIVATION; LISTERIA-MONOCYTOGENES; FOODBORNE PATHOGENS; NONTHERMAL PLASMA; FRESH PRODUCE; STERILIZATION; PRESSURE;

D O I：

10.4315/0362-028X.JFP-16-499

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

The lethal and sublethal effect of a dielectric bather discharge atmospheric cold plasma on Staphylococcus aureus were investigated by nonselective and selective media. The inactivation level and sublethally injured proportions of S. aureus cells by dielectric bather discharge atmospheric cold plasma depended on the treatment times (0, 5, 15, and 45 s), applied input powers (40, 50, and 60 W), and gap distances (2, 4, and 6 mm). Under weak conditions (e.g., 5 s, 40 W, and 6 mm), the occurrence of inactivation and sublethal injury of S. aureus showed a relatively low level. Strong treatment (e.g., 45 s, 60 W, and 2 mm) resulted in highly an inactivated rate, but with small fractions of sublethally injured S. aureus cells. Mild action of cold plasma induced both a large inactivation and a sublethal injury of S. aureus. Therefore, it is significant to optimize the processing of cold plasma sterilization in practice to ensure food safety.

引用

页码：928 / 932

页数：5

共 28 条

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