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Synergistic effect between Helichrysum italicum essential oil and cold nitrogen plasma against Staphylococcus aureus biofilms on different food‐contact surfaces
Author(s) -
Cui Haiying,
Li Wei,
Li Changzhu,
Lin Lin
Publication year - 2016
Publication title -
international journal of food science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.831
H-Index - 96
eISSN - 1365-2621
pISSN - 0950-5423
DOI - 10.1111/ijfs.13231
Subject(s) - biofilm , staphylococcus aureus , essential oil , population , microbiology and biotechnology , chemistry , food science , penicillium italicum , biology , bacteria , medicine , antifungal , genetics , environmental health
Summary Staphylococcus aureus is the most common pathogen in human, and the most diseases produced by S. aureus are associated with biofilms. Helichrysum italicum essential oil ( EO ), as a natural and safe spice, was employed to disperse S. aureus biofilm by cold nitrogen plasma ( CNP ) assist. After S. aureus biofilm formation on food container surfaces, they were exposed to CNP and then treated with Helichrysum italicum EO for biofilm dispersion. The population of S. aureus biofilm was approximately reduced by 2 logs after individual treatment of 0.5 mg mL −1 Helichrysum italicum EO or 400 W CNP . Interestingly, the combined treatment of Helichrysum italicum EO (0.5 mg mL −1 , 40 min) and CNP (400 W, 1 min) reduced the S. aureus viable count in biofilm below 2 logs CFU per cm 2 after 1‐day storage. Therefore, the synergetic treatment holds great promise to improve the current treatment systems of bacterial contamination on different food‐contact surfaces.