1
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Kim SH, Roy PK, Park SY. Synergistic Effects of Combined Flavourzyme and Floating Electrode-Dielectric Barrier Discharge Plasma on Reduction of Escherichia coli Biofilms in Squid ( Todarodes pacificus). Microorganisms 2024; 12:1188. [PMID: 38930569 PMCID: PMC11205502 DOI: 10.3390/microorganisms12061188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Revised: 06/04/2024] [Accepted: 06/07/2024] [Indexed: 06/28/2024] Open
Abstract
This study investigated the synergistic effect of combining flavourzyme, a natural enzyme, and floating electrode-dielectric barrier discharge (FE-DBD) plasma (1.1 kV, 43 kHz, N2 1.5 m/s) treatment, a non-thermal decontamination technology, against Escherichia coli biofilms in squid. E. coli (ATCC 35150 and ATCC 14301) biofilms were formed on the surface of squid and treated with different minimum inhibitory concentrations (MICs) of flavourzyme (1/8; 31.25 μL/mL, 1/4; 62.5 μL/mL, 2/4; 125 μL/mL, and 3/4 MIC; 250 μL/mL) and FE-DBD plasma (5, 10, 30, and 60 min). Independently, flavourzyme and FE-DBD plasma treatment decreased by 0.26-1.71 and 0.19-1.03 log CFU/cm2, respectively. The most effective synergistic combination against E. coli biofilms was observed at 3/4 MIC flavourzyme + 60 min FE-DBD plasma exposure, resulting in a reduction of 1.55 log CFU/cm2. Furthermore, the combined treatment exhibited higher efficacy in E. coli biofilm inactivation in squid compared to individual treatments. The pH values of the synergistic combinations were not significantly different from those of the untreated samples. The outcomes indicate that the combined treatment with flavourzyme and FE-DBD plasma can effectively provide effective control of E. coli biofilms without causing pH changes in squid. Therefore, our study suggests a new microbial control method for microbial safety in the seafood industry.
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Affiliation(s)
| | - Pantu Kumar Roy
- Department of Seafood Science and Technology, Institute of Marine Industry, Gyeongsang National University, Tongyeong 53064, Republic of Korea;
| | - Shin Young Park
- Department of Seafood Science and Technology, Institute of Marine Industry, Gyeongsang National University, Tongyeong 53064, Republic of Korea;
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2
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Sahraeian S, Rashidinejad A, Niakousari M. Enhanced properties of non-starch polysaccharide and protein hydrocolloids through plasma treatment: A review. Int J Biol Macromol 2023; 249:126098. [PMID: 37543265 DOI: 10.1016/j.ijbiomac.2023.126098] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 07/10/2023] [Accepted: 07/24/2023] [Indexed: 08/07/2023]
Abstract
Hydrocolloids are important ingredients in food formulations and their modification can lead to novel ingredients with unique functionalities beyond their nutritional value. Cold plasma is a promising technology for the modification of food biopolymers due to its non-toxic and eco-friendly nature. This review discusses the recent published studies on the effects of cold plasma treatment on non-starch hydrocolloids and their derivatives. It covers the common phenomena that occur during plasma treatment, including ionization, etching effect, surface modification, and ashing effect, and how they contribute to various changes in food biopolymers. The effects of plasma treatment on important properties such as color, crystallinity, chemical structure, rheological behavior, and thermal properties of non-starch hydrocolloids and their derivatives are also discussed. In addition, this review highlights the potential of cold plasma treatment to enhance the functionality of food biopolymers and improve the quality of food products. The mechanisms underlying the effects of plasma treatment on food biopolymers, which can be useful for future research in this area, are also discussed. Overall, this review paper presents a comprehensive overview of the current knowledge in the field of cold plasma treatment of non-starch hydrocolloids and their derivatives and highlights the areas that require further investigation.
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Affiliation(s)
- Shahriyar Sahraeian
- Department of Food Science and Technology, College of Agriculture, Shiraz University, Shiraz, Iran
| | - Ali Rashidinejad
- Riddet Institute, Massey University, Private Bag 11222, Palmerston North 4442, New Zealand.
| | - Mehrdad Niakousari
- Department of Food Science and Technology, College of Agriculture, Shiraz University, Shiraz, Iran
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3
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Cui H, Wang Q, Rai R, Salvi D, Nitin N. DNA-based surrogates for the validation of microbial inactivation using cold atmospheric pressure plasma and plasma-activated water processing. J FOOD ENG 2023. [DOI: 10.1016/j.jfoodeng.2022.111267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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4
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Wang Q, Lavoine N, Salvi D. Cold atmospheric pressure plasma for the sanitation of conveyor belt materials: Decontamination efficacy against adherent bacteria and biofilms of Escherichia coli and effect on surface properties. INNOV FOOD SCI EMERG 2022. [DOI: 10.1016/j.ifset.2022.103260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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5
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Han J, Dong P, Holman BWB, Yang H, Chen X, Zhu L, Luo X, Mao Y, Zhang Y. Processing interventions for enhanced microbiological safety of beef carcasses and beef products: A review. Crit Rev Food Sci Nutr 2022; 64:2105-2129. [PMID: 36148812 DOI: 10.1080/10408398.2022.2121258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Chilled beef is inevitably contaminated with microorganisms, starting from the very beginning of the slaughter line. A lot of studies have aimed to improve meat safety and extend the shelf life of chilled beef, of which some have focused on improving the decontamination effects using traditional decontamination interventions, and others have investigated newer technologies and methods, that offer greater energy efficiency, lower environmental impacts, and better assurances for the decontamination of beef carcasses and cuts. To inform industry, there is an urgent need to review these interventions, analyze the merits and demerits of each technology, and provide insight into 'best practice' to preserve microbial safety and beef quality. In this review, the strategies and procedures used to inhibit the growth of microorganisms on beef, from slaughter to storage, have been critiqued. Critical aspects, where there is a lack of data, have been highlighted to help guide future research. It is also acknowledge that different intervention programs for microbiological safety have different applications, dependent on the initial microbial load, the type of infrastructures, and different stages of beef processing.
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Affiliation(s)
- Jina Han
- Lab of Beef Processing and Quality Control, College of Food Science and Engineering, Shandong Agricultural University, Taian, Shandong, P. R. China
- National R&D Center for Beef Processing Technology, Tai'an, Shandong, P. R. China
| | - Pengcheng Dong
- Lab of Beef Processing and Quality Control, College of Food Science and Engineering, Shandong Agricultural University, Taian, Shandong, P. R. China
- National R&D Center for Beef Processing Technology, Tai'an, Shandong, P. R. China
| | - Benjamin W B Holman
- Centre for Red Meat and Sheep Development, NSW Department of Primary Industries, Cowra, New South Wales, Australia
| | - Huixuan Yang
- Lab of Beef Processing and Quality Control, College of Food Science and Engineering, Shandong Agricultural University, Taian, Shandong, P. R. China
- National R&D Center for Beef Processing Technology, Tai'an, Shandong, P. R. China
| | - Xue Chen
- Lab of Beef Processing and Quality Control, College of Food Science and Engineering, Shandong Agricultural University, Taian, Shandong, P. R. China
- National R&D Center for Beef Processing Technology, Tai'an, Shandong, P. R. China
| | - Lixian Zhu
- Lab of Beef Processing and Quality Control, College of Food Science and Engineering, Shandong Agricultural University, Taian, Shandong, P. R. China
- National R&D Center for Beef Processing Technology, Tai'an, Shandong, P. R. China
| | - Xin Luo
- Lab of Beef Processing and Quality Control, College of Food Science and Engineering, Shandong Agricultural University, Taian, Shandong, P. R. China
- National R&D Center for Beef Processing Technology, Tai'an, Shandong, P. R. China
| | - Yanwei Mao
- Lab of Beef Processing and Quality Control, College of Food Science and Engineering, Shandong Agricultural University, Taian, Shandong, P. R. China
- National R&D Center for Beef Processing Technology, Tai'an, Shandong, P. R. China
| | - Yimin Zhang
- Lab of Beef Processing and Quality Control, College of Food Science and Engineering, Shandong Agricultural University, Taian, Shandong, P. R. China
- National R&D Center for Beef Processing Technology, Tai'an, Shandong, P. R. China
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6
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Jenns K, Sassi HP, Zhou R, Cullen PJ, Carter D, Mai-Prochnow A. Inactivation of foodborne viruses: Opportunities for cold atmospheric plasma. Trends Food Sci Technol 2022. [DOI: 10.1016/j.tifs.2022.04.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Zhai SY, Kong MG, Xia YM. Cold Atmospheric Plasma Ameliorates Skin Diseases Involving Reactive Oxygen/Nitrogen Species-Mediated Functions. Front Immunol 2022; 13:868386. [PMID: 35720416 PMCID: PMC9204314 DOI: 10.3389/fimmu.2022.868386] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 05/09/2022] [Indexed: 11/13/2022] Open
Abstract
Skin diseases are mainly divided into infectious diseases, non-infectious inflammatory diseases, cancers, and wounds. The pathogenesis might include microbial infections, autoimmune responses, aberrant cellular proliferation or differentiation, and the overproduction of inflammatory factors. The traditional therapies for skin diseases, such as oral or topical drugs, have still been unsatisfactory, partly due to systematic side effects and reappearance. Cold atmospheric plasma (CAP), as an innovative and non-invasive therapeutic approach, has demonstrated its safe and effective functions in dermatology. With its generation of reactive oxygen species and reactive nitrogen species, CAP exhibits significant efficacies in inhibiting bacterial, viral, and fungal infections, facilitating wound healing, restraining the proliferation of cancers, and ameliorating psoriatic or vitiligous lesions. This review summarizes recent advances in CAP therapies for various skin diseases and implicates future strategies for increasing effectiveness or broadening clinical indications.
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Affiliation(s)
- Si-yue Zhai
- Department of Dermatology, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
- Center of Plasma Biomedicine, State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an, China
| | - Michael G. Kong
- Center of Plasma Biomedicine, State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an, China
- School of Electrical Engineering, Xi’an Jiaotong University, Xi’an, China
| | - Yu-min Xia
- Department of Dermatology, The Second Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
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8
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Asl PJ, Rajulapati V, Gavahian M, Kapusta I, Putnik P, Mousavi Khaneghah A, Marszałek K. Non-thermal plasma technique for preservation of fresh foods: A review. Food Control 2022. [DOI: 10.1016/j.foodcont.2021.108560] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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9
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Govaert M, Smet C, Acquah C, Walsh JL, Van Impe JFM. Behavior of the Surviving Population of Listeria monocytogenes and Salmonella Typhimurium Biofilms Following a Direct Helium-Based Cold Atmospheric Plasma Treatment. Front Microbiol 2022; 13:831434. [PMID: 35401458 PMCID: PMC8988229 DOI: 10.3389/fmicb.2022.831434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 03/07/2022] [Indexed: 12/04/2022] Open
Abstract
Although the Cold Atmospheric Plasma (CAP) technology proved promising for inactivation of biofilms present on abiotic food contact surfaces, more research is required to examine the behavior of the CAP surviving biofilm-associated cells. It was therefore examined whether (i) CAP treated (Listeria monocytogenes and Salmonella Typhimurium) biofilm-associated cells were able to further colonize the already established biofilms during a subsequent incubation period and (ii) isolates of the surviving population became less susceptible toward CAP when the number of biofilm development—CAP treatment cycles increased. For this purpose, a direct treatment was applied using a helium-based Dielectric Barrier Discharge electrode configuration. Results indicated that the surviving population was able to further colonize the already established biofilms, since the cell density of the CAP treated + incubated biofilms equaled the initial density of the untreated biofilms. For the L. monocytogenes biofilms, also the total biomass proved to further increase, which might result in an even further increased resistance. The susceptibility of the biofilm-associated cells proved to be influenced by the specific number of CAP treatment cycles, which might potentially result in an overestimation of the CAP treatment efficacy and, consequently, an increased risk of food contamination.
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Affiliation(s)
- Marlies Govaert
- CPMF2 - Flemish Cluster Predictive Microbiology in Foods, Ghent, Belgium
- OPTEC - Optimization in Engineering Center-of-Excellence, KU Leuven, Ghent, Belgium
- BioTeC+ - Chemical and Biochemical Process Technology and Control, Department of Chemical Engineering, KU Leuven, Ghent, Belgium
| | - Cindy Smet
- CPMF2 - Flemish Cluster Predictive Microbiology in Foods, Ghent, Belgium
- OPTEC - Optimization in Engineering Center-of-Excellence, KU Leuven, Ghent, Belgium
- BioTeC+ - Chemical and Biochemical Process Technology and Control, Department of Chemical Engineering, KU Leuven, Ghent, Belgium
| | - Cyril Acquah
- BioTeC+ - Chemical and Biochemical Process Technology and Control, Department of Chemical Engineering, KU Leuven, Ghent, Belgium
| | - James L. Walsh
- Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool, United Kingdom
| | - Jan F. M. Van Impe
- CPMF2 - Flemish Cluster Predictive Microbiology in Foods, Ghent, Belgium
- OPTEC - Optimization in Engineering Center-of-Excellence, KU Leuven, Ghent, Belgium
- BioTeC+ - Chemical and Biochemical Process Technology and Control, Department of Chemical Engineering, KU Leuven, Ghent, Belgium
- *Correspondence: Jan F. M. Van Impe,
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10
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Abstract
Cold atmospheric plasma (CAP) is a tunable source of reactive species and other physical factors. It exerts luxuriant biochemical effects on diverse cells, including bacterial cells, mammalian cells, and plant cells. Over the past decade, CAP has shown promising application in modern agriculture. Here, we focused on the state of the art of plasma agriculture, particularly the improvement of seed germination rates. Typical plasma sources, underlying physical principles, and the chemical and cellular mechanism of plasma’s effect on plants seeds have been discussed in depth.
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11
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Katsigiannis AS, Bayliss DL, Walsh JL. Cold plasma for the disinfection of industrial food‐contact surfaces: An overview of current status and opportunities. Compr Rev Food Sci Food Saf 2022; 21:1086-1124. [DOI: 10.1111/1541-4337.12885] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 10/26/2021] [Accepted: 11/16/2021] [Indexed: 12/14/2022]
Affiliation(s)
| | - Danny L. Bayliss
- Processing & Production Research Department Campden BRI Gloucestershire UK
| | - James L. Walsh
- Department of Electrical Engineering & Electronics University of Liverpool Liverpool UK
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12
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Dhivya R, Rajakrishnapriya VC, Sruthi K, Chidanand DV, Sunil CK, Rawson A. Biofilm combating in the food industry: Overview, non‐thermal approaches, and mechanisms. J FOOD PROCESS PRES 2022. [DOI: 10.1111/jfpp.16282] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- R. Dhivya
- Industry Academia Cell National Institute of Food Technology, Entrepreneurship and Management (NIFTEM) ‐ Thanjavur Thanjavur India
| | - V. C. Rajakrishnapriya
- Industry Academia Cell National Institute of Food Technology, Entrepreneurship and Management (NIFTEM) ‐ Thanjavur Thanjavur India
| | - K. Sruthi
- Industry Academia Cell National Institute of Food Technology, Entrepreneurship and Management (NIFTEM) ‐ Thanjavur Thanjavur India
| | - D. V. Chidanand
- Industry Academia Cell National Institute of Food Technology, Entrepreneurship and Management (NIFTEM) ‐ Thanjavur Thanjavur India
| | - C. K. Sunil
- Department of Food Engineering National Institute of Food Technology, Entrepreneurship and Management (NIFTEM) ‐ Thanjavur Thanjavur India
| | - Ashish Rawson
- Department of Food Safety and Quality Testing National Institute of Food Technology, Entrepreneurship and Management (NIFTEM) ‐ Thanjavur Thanjavur India
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13
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Wang S, Liu Y, Zhang Y, Lü X, Zhao L, Song Y, Zhang L, Jiang H, Zhang J, Ge W. Processing sheep milk by cold plasma technology: Impacts on the microbial inactivation, physicochemical characteristics, and protein structure. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2021.112573] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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14
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Sharma S, Jaiswal S, Duffy B, Jaiswal AK. Advances in emerging technologies for the decontamination of the food contact surfaces. Food Res Int 2022; 151:110865. [PMID: 34980401 DOI: 10.1016/j.foodres.2021.110865] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 11/13/2021] [Accepted: 12/02/2021] [Indexed: 11/18/2022]
Abstract
Foodborne pathogens could be transferred to food from food contact surfaces contaminated by poor hygiene or biofilm formation. The food processing industry has various conditions favouring microbes' adherence, such as moisture, nutrients, and the microbial inoculums obtained from the raw material. The function of the ideal antimicrobial surface is preventing initial attachment of the microbes, killing the microbes or/and removing the dead bacteria. This review article provides detail about the challenges food industries are facing with respect to food contact materials. It also summarises the merits and demerits of several sanitizing methods developed for industrial use. Furthermore, it reviews the new and emerging techniques that enhance the efficiency of reducing microbial contamination. Techniques such as surface functionalisation, high-intensity ultrasound, cold plasma technologies etc. which have high potential to be used for the decontamination of food contact surfaces are discussed. The emerging designs of antibacterial surfaces provide the opportunity to reduce or eradicate the adhesion of microorganisms. The most important purpose of these surfaces is to prevent the attachment of bacteria and to kill the bacteria that come in contact. These emerging technologies have a high potential for developing safe and inert food contact materials for the food industry.
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Affiliation(s)
- Shubham Sharma
- School of Food Science and Environmental Health, College of Sciences and Health, Technological University Dublin - City Campus, Central Quad, Grangegorman, Dublin D07 ADY7, Ireland; Environmental Sustainability and Health Institute, Technological University Dublin - City Campus, Grangegorman, Dublin D07 H6K8, Ireland; Centre for Research in Engineering and Surface Technology (CREST-Gateway), FOCAS Institute, Technological University Dublin - City Campus, Kevin Street, Dublin D08 CKP1, Ireland
| | - Swarna Jaiswal
- School of Food Science and Environmental Health, College of Sciences and Health, Technological University Dublin - City Campus, Central Quad, Grangegorman, Dublin D07 ADY7, Ireland; Environmental Sustainability and Health Institute, Technological University Dublin - City Campus, Grangegorman, Dublin D07 H6K8, Ireland.
| | - Brendan Duffy
- Centre for Research in Engineering and Surface Technology (CREST-Gateway), FOCAS Institute, Technological University Dublin - City Campus, Kevin Street, Dublin D08 CKP1, Ireland
| | - Amit K Jaiswal
- School of Food Science and Environmental Health, College of Sciences and Health, Technological University Dublin - City Campus, Central Quad, Grangegorman, Dublin D07 ADY7, Ireland; Environmental Sustainability and Health Institute, Technological University Dublin - City Campus, Grangegorman, Dublin D07 H6K8, Ireland
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15
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Olatunde OO, Chantakun K, Benjakul S. Microbial, chemical qualities and shelf-life of blue swimming crab (Portunus armatus) lump meat as influenced by in-package high voltage cold plasma treatment. FOOD BIOSCI 2021. [DOI: 10.1016/j.fbio.2021.101274] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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16
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Starič P, Grobelnik Mlakar S, Junkar I. Response of Two Different Wheat Varieties to Glow and Afterglow Oxygen Plasma. PLANTS (BASEL, SWITZERLAND) 2021; 10:plants10081728. [PMID: 34451772 PMCID: PMC8398593 DOI: 10.3390/plants10081728] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 08/17/2021] [Accepted: 08/18/2021] [Indexed: 06/13/2023]
Abstract
Cold plasma technology has received significant attention in agriculture due to its effect on the seeds and plants of important cultivars, such as wheat. Due to climate change, wherein increasing temperatures and droughts are frequent, it is important to consider novel approaches to agricultural production. As increased dormancy levels in wheat are correlated with high temperatures and drought, improving the germination and root growth of wheat seeds could offer new possibilities for seed sowing. The main objective of this study was to evaluate the influence of direct (glow) and indirect (afterglow) radio-frequency (RF) oxygen plasma treatments on the germination of two winter wheat varieties: Apache and Bezostaya 1. The influence of plasma treatment on seed surface morphology was studied using scanning electron microscopy, and it was observed that direct plasma treatment resulted in a high etching and nanostructuring of the seed surface. The effect of plasma treatment on germination was evaluated by measuring the germination rate, counting the number of roots and the length of the root system, and the fresh weight of seedlings. The results of this study indicate that the response of seeds to direct and indirect plasma treatment may be variety-dependent, as differences between the two wheat varieties were observed.
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Affiliation(s)
- Pia Starič
- Jožef Stefan Institute, Jamova Cesta 39, 1000 Ljubljana, Slovenia;
| | - Silva Grobelnik Mlakar
- Faculty of Agriculture and Life Sciences, University of Maribor, Pivola 10, 2311 Hoče, Slovenia;
| | - Ita Junkar
- Jožef Stefan Institute, Jamova Cesta 39, 1000 Ljubljana, Slovenia;
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17
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Tan J, Karwe MV. Inactivation and removal of Enterobacter aerogenes biofilm in a model piping system using plasma-activated water (PAW). INNOV FOOD SCI EMERG 2021. [DOI: 10.1016/j.ifset.2021.102664] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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18
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Cold plasma decontamination of stainless steel food processing surfaces assessed using an industrial disinfection protocol. Food Control 2021. [DOI: 10.1016/j.foodcont.2020.107543] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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19
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Mai-Prochnow A, Zhou R, Zhang T, Ostrikov K(K, Mugunthan S, Rice SA, Cullen PJ. Interactions of plasma-activated water with biofilms: inactivation, dispersal effects and mechanisms of action. NPJ Biofilms Microbiomes 2021; 7:11. [PMID: 33504802 PMCID: PMC7841176 DOI: 10.1038/s41522-020-00180-6] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 12/11/2020] [Indexed: 01/30/2023] Open
Abstract
Biofilms have several characteristics that ensure their survival in a range of adverse environmental conditions, including high cell numbers, close cell proximity to allow easy genetic exchange (e.g., for resistance genes), cell communication and protection through the production of an exopolysaccharide matrix. Together, these characteristics make it difficult to kill undesirable biofilms, despite the many studies aimed at improving the removal of biofilms. An elimination method that is safe, easy to deliver in physically complex environments and not prone to microbial resistance is highly desired. Cold atmospheric plasma, a lightning-like state generated from air or other gases with a high voltage can be used to make plasma-activated water (PAW) that contains many active species and radicals that have antimicrobial activity. Recent studies have shown the potential for PAW to be used for biofilm elimination without causing the bacteria to develop significant resistance. However, the precise mode of action is still the subject of debate. This review discusses the formation of PAW generated species and their impacts on biofilms. A focus is placed on the diffusion of reactive species into biofilms, the formation of gradients and the resulting interaction with the biofilm matrix and specific biofilm components. Such an understanding will provide significant benefits for tackling the ubiquitous problem of biofilm contamination in food, water and medical areas.
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Affiliation(s)
- Anne Mai-Prochnow
- grid.1013.30000 0004 1936 834XSchool of Chemical and Biomolecular Engineering, The University of Sydney, Darlington, NSW 2006 Australia
| | - Renwu Zhou
- grid.1013.30000 0004 1936 834XSchool of Chemical and Biomolecular Engineering, The University of Sydney, Darlington, NSW 2006 Australia
| | - Tianqi Zhang
- grid.1013.30000 0004 1936 834XSchool of Chemical and Biomolecular Engineering, The University of Sydney, Darlington, NSW 2006 Australia
| | - Kostya (Ken) Ostrikov
- grid.1024.70000000089150953School of Chemistry and Physics, Queensland University of Technology, Brisbane, QLD 4000 Australia
| | - Sudarsan Mugunthan
- grid.59025.3b0000 0001 2224 0361The Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, 639798 Singapore
| | - Scott A. Rice
- grid.59025.3b0000 0001 2224 0361The Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University, Singapore, 639798 Singapore ,grid.59025.3b0000 0001 2224 0361The School of Biological Sciences, Nanyang Technological University, Singapore, 639798 Singapore ,grid.117476.20000 0004 1936 7611The ithree Institute, The University of Technology Sydney, Sydney, NSW 2007 Australia
| | - Patrick J. Cullen
- grid.1013.30000 0004 1936 834XSchool of Chemical and Biomolecular Engineering, The University of Sydney, Darlington, NSW 2006 Australia
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20
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Liu D, Huang Q, Gu W, Zeng XA. A review of bacterial biofilm control by physical strategies. Crit Rev Food Sci Nutr 2021; 62:3453-3470. [PMID: 33393810 DOI: 10.1080/10408398.2020.1865872] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Biofilms are multicellular communities of microorganisms held together by a self-produced extracellular matrix, which contribute to hygiene problems in the food and medical fields. Both spoilage and pathogenic bacteria that grow in the complex structure of biofilm are more resistant to harsh environmental conditions and conventional antimicrobial agents. Therefore, it is important to develop eco-friendly preventive methodologies to eliminate biofilms from foods and food contact equipment. The present paper gives an overview of the current physical methods for biofilm control and removal. Current physical strategies adopted for the anti-biofilm treatment mainly focused on use of ultrasound power, electric or magnetic field, plasma, and irradiation. Furthermore, the mechanisms of anti-biofilm action and application of different physical methods are discussed. Physical strategies make it possible to combat biofilm without the use of biocidal agents. The remarkable microbiocidal properties of physical strategies are promising tools for antimicrobial applications.
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Affiliation(s)
- Dan Liu
- Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, Guangdong, PR China
| | - Quanfeng Huang
- Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, Guangdong, PR China
| | - Weiming Gu
- Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, Guangdong, PR China
| | - Xin-An Zeng
- School of Food Science & Engineering, South China University of Technology, Guangzhou, Guangdong, PR China
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21
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Effects of Nonthermal Plasma on Morphology, Genetics and Physiology of Seeds: A Review. PLANTS 2020; 9:plants9121736. [PMID: 33316909 PMCID: PMC7764006 DOI: 10.3390/plants9121736] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 12/03/2020] [Accepted: 12/07/2020] [Indexed: 01/20/2023]
Abstract
Nonthermal plasma (NTP), or cold plasma, has shown many advantages in the agriculture sector as it enables removal of pesticides and contaminants from the seed surface, increases shelf life of crops, improves germination and resistance to abiotic stress. Recent studies show that plasma treatment indeed offers unique and environmentally friendly processing of different seeds, such as wheat, beans, corn, soybeans, barley, peanuts, rice and Arabidopsis thaliana, which could reduce the use of agricultural chemicals and has a high potential in ecological farming. This review covers the main concepts and underlying principles of plasma treatment techniques and their interaction with seeds. Different plasma generation methods and setups are presented and the influence of plasma treatment on DNA damage, gene expression, enzymatic activity, morphological and chemical changes, germination and resistance to stress, is explained. Important plasma treatment parameters and interactions of plasma species with the seed surface are presented and critically discussed in correlation with recent advances in this field. Although plasma agriculture is a relatively new field of research, and the complex mechanisms of interactions are not fully understood, it holds great promise for the future. This overview aims to present the advantages and limitations of different nonthermal plasma setups and discuss their possible future applications.
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22
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Kang JW, Lee HY, Kang DH. Synergistic bactericidal effect of hot water with citric acid against Escherichia coli O157:H7 biofilm formed on stainless steel. Food Microbiol 2020; 95:103676. [PMID: 33397610 DOI: 10.1016/j.fm.2020.103676] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 10/29/2020] [Accepted: 11/03/2020] [Indexed: 11/16/2022]
Abstract
This study investigated the antimicrobial effect of hot water with citric acid against Escherichia coli O157:H7 biofilm on stainless steel (SS). Hot water (50, 60, or 70 °C) with 2% citric acid exhibited a synergistic bactericidal effect on the pathogen biofilm. It was revealed that hot water and citric acid combination induced sub-lethally injured cells. Additionally, mechanisms of the synergistic bactericidal effects of hot water with citric acid were identified through several approaches. In terms of biofilm matrix, hot water removes exopolysaccharides, a major component of extracellular polymeric substances (EPS), thereby increasing contact between surface cells and citric acid, resulting in a synergistic bactericidal effect. In terms of the cell itself, increased permeability of citric acid through cell membranes destructed by hot water promotes the inactivation of superoxide dismutase (SOD) in E. coli O157:H7, which induce synergistic generation of reactive oxygen species (ROS) which promote inactivation of cell by activating lipid peroxidation, resulting in destruction of the cell membrane. Therefore, it is interpreted that when hot water with citric acid is applied to E. coli O157:H7 biofilm, synergy effects on the biofilm matrix and cell itself have a complex interaction with each other, thus causing a dramatic synergistic bactericidal effect.
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Affiliation(s)
- Jun-Won Kang
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, Research Institute for Agricultural and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea; Institutes of Green Bio Science & Technology, Seoul National University, Pyeongchang-gun, Gangwon-do, 25354, Republic of Korea
| | - Hae-Yeon Lee
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, Research Institute for Agricultural and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea; Institutes of Green Bio Science & Technology, Seoul National University, Pyeongchang-gun, Gangwon-do, 25354, Republic of Korea
| | - Dong-Hyun Kang
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, Research Institute for Agricultural and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea; Institutes of Green Bio Science & Technology, Seoul National University, Pyeongchang-gun, Gangwon-do, 25354, Republic of Korea.
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23
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Influence of Plasma Characteristics on the Inactivation Mechanism of Cold Atmospheric Plasma (CAP) for Listeria monocytogenes and Salmonella Typhimurium Biofilms. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10093198] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This research aimed to take a next step towards unravelling the CAP inactivation mechanism for mature (Listeria monocytogenes (Gram positive) and Salmonella Typhimurium (Gram negative)) model biofilms, which will support the further optimization this novel technology. More specifically, we examined how the inactivation mechanism was influenced by the applied processing conditions, i.e., by the electrode configuration, the composition of the gas flow, and the power of the discharge. For each combination of plasma characteristics, we examined if the applied CAP treatment had an effect on (i) the cell membrane, (ii) the intracellular DNA, and (iii) the EPS matrix. In addition, we assessed which (reactive) CAP species were responsible for this lethal/damaging effect and whether these species were able to diffuse into the deeper layers of the biofilms. The results indicated that the inactivation mechanism was indeed influenced by the applied processing conditions. Nevertheless, the bactericidal effect of CAP was always a combination of both damage to the membrane and the DNA, caused by (i) the generation of (intracellular) ROS and RNS, (ii) a drop in pH, and/or (iii) the potential generation of a small amount of UV photons. Moreover, the plasma species were able to penetrate into the deeper layers of the model biofilms and some treatment conditions resulted in an increased biofilm porosity.
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24
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Craighead S, Hertrich S, Boyd G, Sites J, Niemira BA, Kniel KE. Cold Atmospheric Plasma Jet Inactivates Cryptosporidium parvum Oocysts on Cilantro. J Food Prot 2020; 83:794-800. [PMID: 32318724 DOI: 10.4315/0362-028x.jfp-19-442] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Accepted: 12/14/2019] [Indexed: 11/11/2022]
Abstract
ABSTRACT Cilantro was recently identified as a vehicle for protozoan illness. Current postharvest practices are not sufficient to inactivate protozoa on cilantro. Cold plasma is an emerging nonthermal waterless technology with potential applications in food processing that are currently being investigated to enhance the safety of herbs. The purpose of this study was to determine the impact of cold atmospheric plasma (CP) on the viability of Cryptosporidium parvum oocysts on cilantro. C. parvum oocysts were inoculated onto cilantro and treated with a CP jet for 0, 30, 90, and 180 s at a working distance of 10 cm with a flow of 1.42 × 10-3 m3/s. Oocyst viability was determined using HCT-8 cell culture infectivity assays. Overall, each treatment significantly reduced oocyst infectivity compared with the 0-s treatment control (P ≤ 0.02). Log inactivations of oocysts observed on cilantro were 0.84, 1.23, and 2.03 for the 30-, 90-, and 180-s treatment times, respectively. Drying and darkening of cilantro leaves was observed with treatments longer than 30 s. CP can reduce C. parvum infectivity on cilantro. With further research and optimization, this treatment technology has potential applications in postharvest processing of cilantro. HIGHLIGHTS
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Affiliation(s)
- Shani Craighead
- Department of Animal and Food Sciences, University of Delaware, Newark, Delaware 19716; and
| | - Sarah Hertrich
- U.S. Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, Wyndmoor, Pennsylvania 19038, USA
| | - Glenn Boyd
- U.S. Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, Wyndmoor, Pennsylvania 19038, USA
| | - Joseph Sites
- U.S. Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, Wyndmoor, Pennsylvania 19038, USA
| | - Brendan A Niemira
- U.S. Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, Wyndmoor, Pennsylvania 19038, USA
| | - Kalmia E Kniel
- Department of Animal and Food Sciences, University of Delaware, Newark, Delaware 19716; and
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25
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Towards the Next-Generation Disinfectant: Composition, Storability and Preservation Potential of Plasma Activated Water on Baby Spinach Leaves. Foods 2019; 8:foods8120692. [PMID: 31861243 PMCID: PMC6963327 DOI: 10.3390/foods8120692] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 12/09/2019] [Accepted: 12/12/2019] [Indexed: 11/16/2022] Open
Abstract
Plasma activated water (PAW) has rapidly emerged as a promising alternative to traditional sanitizers applied in the fresh produce industry. In the present study, PAW chemistry and storage stability were assessed as a function of plasma operating conditions. Increasing plasma exposure time (5, 12.5, 20 min) and power (16, 26, 36 W) led to a significant drop in pH (2.4) and higher nitrates and nitrites levels (320 and 7.2 mg/L, respectively) in the PAW. Non-detectable hydrogen peroxide concentration, irrespective of the treatment conditions, was attributed to its instability in acidic environments and the remote PAW generation mode. pH, nitrates and nitrites levels in the PAW remained unaffected after two weeks at 4 °C. The potential of PAW for microbial inactivation and quality retention was demonstrated on baby spinach leaves. Rinsing steps influenced colour development during chilled storage to a greater extent than PAW treatment itself. About 1 log reduction in total bacterial counts (5 log CFU/g) was achieved through PAW rinsing, with no variability after eight days at 4 °C (typical shelf-life at retailers). Moreover, microbial levels on PAW-treated samples after storage were significantly lower than those on control samples, thus contributing to extended product shelf-life and reduced food waste generation.
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26
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Current status of emerging food processing technologies in Latin America: Novel non-thermal processing. INNOV FOOD SCI EMERG 2019. [DOI: 10.1016/j.ifset.2019.102233] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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27
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Govaert M, Smet C, Walsh JL, Van Impe JFM. Dual-Species Model Biofilm Consisting of Listeria monocytogenes and Salmonella Typhimurium: Development and Inactivation With Cold Atmospheric Plasma (CAP). Front Microbiol 2019; 10:2524. [PMID: 31787943 PMCID: PMC6854999 DOI: 10.3389/fmicb.2019.02524] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Accepted: 10/21/2019] [Indexed: 12/17/2022] Open
Abstract
Most environmental biofilms contain a variety of species. These species can establish cooperative and competitive interactions, possibly resulting in an increase or a decrease in antimicrobial resistance. Therefore, results obtained following inactivation of single-species biofilms by means of different technologies (e.g., Cold Atmospheric Plasma, CAP) should be validated for multi-species biofilms. First, a strongly adherent and mature Listeria monocytogenes and S. Typhimurium dual-species biofilm was developed by altering different incubation conditions, i.e., growth medium, incubation temperature, inoculum ratio of L. monocytogenes and S. Typhimurium cells, and incubation time. Adherence and maturity were quantified by means of optical density measurements and viable plate counts, respectively. Secondly, both the (1 day old) reference biofilm and a more mature 7 days old biofilm were treated for different CAP treatment times (0-30 min). Viable plate counts were again used to determine the (remaining) cell density. For both the biofilm development and inactivation, predictive models were applied to describe the growth/inactivation kinetics. Finally, the kinetics of the [1 and 7 day(s) old] dual-species biofilms were compared with those obtained for the corresponding single-species biofilms. Results implied that a strongly adherent and mature reference dual-species biofilm was obtained following 24 h of incubation at 25°C using 20-fold diluted TSB and an inoculum ratio of 1:1. Main observations regarding CAP inactivation were: (i) the dual-species biofilm age had no influence on the CAP efficacy, although a longer treatment time was required for the oldest biofilm, (ii) for the 1 day old biofilms, CAP treatment became less efficient for S. Typhimurium inactivation when this species was part of the dual-species biofilm, while L. monocytogenes inactivation was not influenced by the biofilm type, and (iii) for the 7 days old biofilms, CAP inactivation of both species became more efficient when they were part of the dual-species biofilms. It can be concluded that the efficacy of the CAP treatment is altered when cells become part of a dual-species biofilm, which is quite important with respect to a possible application of CAP for biofilm inactivation within the food industry.
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Affiliation(s)
- Marlies Govaert
- CPMF2, Flemish Cluster Predictive Microbiology in Foods, Ghent, Belgium.,OPTEC, Optimization in Engineering Center-of-Excellence, KU Leuven, Ghent, Belgium.,BioTeC, Chemical and Biochemical Process Technology and Control, Department of Chemical Engineering, KU Leuven, Ghent, Belgium
| | - Cindy Smet
- CPMF2, Flemish Cluster Predictive Microbiology in Foods, Ghent, Belgium.,OPTEC, Optimization in Engineering Center-of-Excellence, KU Leuven, Ghent, Belgium.,BioTeC, Chemical and Biochemical Process Technology and Control, Department of Chemical Engineering, KU Leuven, Ghent, Belgium
| | - James L Walsh
- Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool, United Kingdom
| | - Jan F M Van Impe
- CPMF2, Flemish Cluster Predictive Microbiology in Foods, Ghent, Belgium.,OPTEC, Optimization in Engineering Center-of-Excellence, KU Leuven, Ghent, Belgium.,BioTeC, Chemical and Biochemical Process Technology and Control, Department of Chemical Engineering, KU Leuven, Ghent, Belgium
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28
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Sakudo A, Yagyu Y, Onodera T. Disinfection and Sterilization Using Plasma Technology: Fundamentals and Future Perspectives for Biological Applications. Int J Mol Sci 2019; 20:ijms20205216. [PMID: 31640211 PMCID: PMC6834201 DOI: 10.3390/ijms20205216] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Revised: 10/19/2019] [Accepted: 10/21/2019] [Indexed: 02/07/2023] Open
Abstract
Recent studies have shown that plasma can efficiently inactivate microbial pathogens such as bacteria, fungi, and viruses in addition to degrading toxins. Moreover, this technology is effective at inactivating pathogens on the surface of medical and dental devices, as well as agricultural products. The current practical applications of plasma technology range from sterilizing therapeutic medical devices to improving crop yields, as well as the area of food preservation. This review introduces recent advances and future perspectives in plasma technology, especially in applications related to disinfection and sterilization. We also introduce the latest studies, mainly focusing on the potential applications of plasma technology for the inactivation of microorganisms and the degradation of toxins.
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Affiliation(s)
- Akikazu Sakudo
- Faculty of Veterinary Medicine, Okayama University of Science, Imabari, Ehime 794-8555, Japan.
| | - Yoshihito Yagyu
- Department of Electrical and Electric Engineering, National Institute of Technology Sasebo College, Nagasaki 857-1193, Japan.
| | - Takashi Onodera
- Research Center for Food Safety, Graduate School of Agricultural and Life Sciences, the University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan.
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29
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Torres Dominguez E, Nguyen PH, Hunt HK, Mustapha A. Antimicrobial Coatings for Food Contact Surfaces: Legal Framework, Mechanical Properties, and Potential Applications. Compr Rev Food Sci Food Saf 2019; 18:1825-1858. [PMID: 33336965 DOI: 10.1111/1541-4337.12502] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2019] [Revised: 07/20/2019] [Accepted: 08/29/2019] [Indexed: 01/09/2023]
Abstract
Food contact surfaces (FCS) in food processing facilities may become contaminated with a number of unwanted microorganisms, such as Listeria monocytogenes, Escherichia coli O157:H7, and Staphylococcus aureus. To reduce contamination and the spread of disease, these surfaces may be treated with sanitizers or have active antimicrobial components adhered to them. Although significant efforts have been devoted to the development of coatings that improve the antimicrobial effectiveness of FCS, other important coating considerations, such as hardness, adhesion to a substrate, and migration of the antimicrobial substance into the food matrix, have largely been disregarded to the detriment of their translation into practical application. To address this gap, this review examines the mechanical properties of antimicrobial coatings (AMC) applied to FCS and their interplay with their antimicrobial properties within the framework of relevant regulatory constraints that would apply if these were used in real-world applications. This review also explores the various assessment techniques for examining these properties, the effects of the deposition methods on coating properties, and the potential applications of such coatings for FCS. Overall, this review attempts to provide a holistic perspective. Evaluation of the current literature urges a compromise between antimicrobial effectiveness and mechanical stability in order to adhere to various regulatory frameworks as the next step toward improving the industrial feasibility of AMC for FCS applications.
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Affiliation(s)
- Eduardo Torres Dominguez
- Dept. of Biomedical, Biological & Chemical Engineering, Univ. of Missouri, Columbia, MO, 65211, U.S.A
| | - Phong H Nguyen
- Dept. of Biomedical, Biological & Chemical Engineering, Univ. of Missouri, Columbia, MO, 65211, U.S.A
| | - Heather K Hunt
- Dept. of Biomedical, Biological & Chemical Engineering, Univ. of Missouri, Columbia, MO, 65211, U.S.A
| | - Azlin Mustapha
- Food Science Program, Univ. of Missouri, Columbia, MO, 65211, U.S.A
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30
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Thomas-Popo E, Mendonça A, Misra N, Little A, Wan Z, Moutiq R, Coleman S, Keener K. Inactivation of Shiga-toxin-producing Escherichia coli, Salmonella enterica and natural microflora on tempered wheat grains by atmospheric cold plasma. Food Control 2019. [DOI: 10.1016/j.foodcont.2019.04.025] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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31
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Kim SH, Park SH, Kim SS, Kang DH. Inactivation of Staphylococcus aureus Biofilms on Food Contact Surfaces by Superheated Steam Treatment. J Food Prot 2019; 82:1496-1500. [PMID: 31411506 DOI: 10.4315/0362-028x.jfp-18-572] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The objective of this study was to compare the inactivation efficacy of saturated steam (SS) and superheated steam (SHS) on Staphylococcus aureus biofilms on food contact surfaces, including type 304 stainless steel coupons with No. 4 finish (STS No. 4), type 304 stainless steel coupons with 2B finish (STS 2B), high-density polyethylene (HDPE), and polypropylene (PP). In addition, the effects of the surface characteristics on the inactivation efficacy were evaluated. Biofilms were formed on each food contact coupon surface using a three-strain cocktail of S. aureus. Five-day-old biofilms on STS No. 4, STS 2B, HDPE, and PP coupons were treated with SS at 100°C and SHS at 125 and 150°C for 2, 4, 7, 10, 15, and 20 s. Among all coupon types, SHS was more effective than SS in inactivating the S. aureus biofilms. S. aureus biofilms on steel coupons were more susceptible to most SS and SHS treatments than the biofilms on plastic coupons. S. aureus biofilms on HDPE and PP coupons were reduced by 4.00 and 5.22 log CFU per coupon, respectively, after SS treatment (100°C) for 20 s. SS treatment for 20 s reduced the amount of S. aureus biofilm on STS No. 4 and STS 2B coupons to below the detection limit. With SHS treatment (150°C), S. aureus biofilms on HDPE and PP needed 15 s to be inactivated to below the detection limit, while steel coupons only needed 10 s. The results of this study suggest that SHS treatment has potential as a biofilm control intervention for the food industry.
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Affiliation(s)
- Soo-Hwan Kim
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea
| | - Sang-Hyun Park
- Department of Food Science and Technology, Kongju National University, Yesan, Chungnam 32439, Republic of Korea
| | - Sang-Soon Kim
- Department of Food Engineering, Dankook University, Cheonan, Chungnam 31116, Republic of Korea
| | - Dong-Hyun Kang
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence and Research Institute for Agriculture and Life Sciences, Seoul National University, Seoul 151-921, Republic of Korea
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32
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Gavahian M, Chu Y, Jo C. Prospective Applications of Cold Plasma for Processing Poultry Products: Benefits, Effects on Quality Attributes, and Limitations. Compr Rev Food Sci Food Saf 2019; 18:1292-1309. [DOI: 10.1111/1541-4337.12460] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 05/07/2019] [Accepted: 05/12/2019] [Indexed: 12/20/2022]
Affiliation(s)
- Mohsen Gavahian
- Product and Process Research CenterFood Industry Research and Development Inst. No. 331 Shih‐Pin Rd. Hsinchu 30062 Taiwan Republic of China
| | - Yan‐Hwa Chu
- Product and Process Research CenterFood Industry Research and Development Inst. No. 331 Shih‐Pin Rd. Hsinchu 30062 Taiwan Republic of China
| | - Cheorun Jo
- Dept. of Agricultural Biotechnology, Center for Food and Bioconvergence, Research Inst. of Agriculture and Life ScienceSeoul National Univ. Seoul 08826 South Korea
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33
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Olatunde OO, Benjakul S, Vongkamjan K. High voltage cold atmospheric plasma: Antibacterial properties and its effect on quality of Asian sea bass slices. INNOV FOOD SCI EMERG 2019. [DOI: 10.1016/j.ifset.2019.01.011] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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34
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Alvarez-Ordóñez A, Coughlan LM, Briandet R, Cotter PD. Biofilms in Food Processing Environments: Challenges and Opportunities. Annu Rev Food Sci Technol 2019; 10:173-195. [PMID: 30653351 DOI: 10.1146/annurev-food-032818-121805] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This review examines the impact of microbial communities colonizing food processing environments in the form of biofilms on food safety and food quality. The focus is both on biofilms formed by pathogenic and spoilage microorganisms and on those formed by harmless or beneficial microbes, which are of particular relevance in the processing of fermented foods. Information is presented on intraspecies variability in biofilm formation, interspecies relationships of cooperativism or competition within biofilms, the factors influencing biofilm ecology and architecture, and how these factors may influence removal. The effect on the biofilm formation ability of particular food components and different environmental conditions that commonly prevail during food processing is discussed. Available tools for the in situ monitoring and characterization of wild microbial biofilms in food processing facilities are explored. Finally, research on novel agents or strategies for the control of biofilm formation or removal is summarized.
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Affiliation(s)
- Avelino Alvarez-Ordóñez
- Department of Food Hygiene and Technology and Institute of Food Science and Technology, Universidad de León, 24071 León, Spain;
| | - Laura M Coughlan
- Teagasc Food Research Centre, Moorepark, Fermoy, County Cork, Ireland.,School of Microbiology, University College Cork, County Cork, Ireland
| | - Romain Briandet
- Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, 78350 France
| | - Paul D Cotter
- Teagasc Food Research Centre, Moorepark, Fermoy, County Cork, Ireland.,APC Microbiome Ireland, Cork, County Cork, Ireland
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35
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Chen J, Wang SZ, Chen JY, Chen DZ, Deng SG, Xu B. Effect of cold plasma on maintaining the quality of chub mackerel (Scomber japonicus): biochemical and sensory attributes. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2019; 99:39-46. [PMID: 29786860 DOI: 10.1002/jsfa.9138] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 05/12/2018] [Accepted: 05/16/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Atmospheric cold plasma (ACP) has emerged as a potential alternative to traditional methods for non-thermal food decontamination. However, few data are available about ACP treatment for seafood. In this study, dielectric barrier discharge (DBD) was applied to generate CP, and the aim of the study was to investigate the effectiveness of DBD-ACP on improving the quality of chub mackerel on the basis of chemical, microbial and sensory characteristics. RESULTS The effect of DBD-ACP on the quality of chub mackerel (Scomber japonicus) during storage was examined. Results revealed that the optimal voltage level and exposure time of this treatment were 60 kV and 60 s respectively, and such conditions exhibited excellent inactivation efficacy and weak influence on proximate chemical compositions. Variations in total viable count (TVC), sensory scores and total volatile basic nitrogen (TVB-N) indicated that ACP treatment extended the shelf life of chub mackerel to 14 days, whereas samples without this treatment exceeded the limits of the three parameters after 6 days. The slow development rates of peroxide value (PV) and thiobarbituric acid (TBA) value implied that lipid oxidation was also effectively retarded by ACP exposure. Scanning electron microscopy confirmed that CP could effectively delay the degradation of myofibrillar proteins and enhance the stability of tissue structures. CONCLUSION The excellent antimicrobial efficacy of ACP treatment makes it a potential and promising alternative to other seafood preservation technology. This is the first report on the application of ACP to seafood, which is essential to perishable food storage. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Jing Chen
- School of Food and Pharmacy, Zhejiang Ocean University, Zhoushan, China
| | - Sheng-Zhe Wang
- School of Food and Pharmacy, Zhejiang Ocean University, Zhoushan, China
| | - Jun-Yu Chen
- School of Food and Pharmacy, Zhejiang Ocean University, Zhoushan, China
| | - Dong-Zhi Chen
- College of Environment, Zhejiang University of Technology, Hangzhou, China
| | - Shang-Gui Deng
- School of Food and Pharmacy, Zhejiang Ocean University, Zhoushan, China
| | - Bin Xu
- School of Food and Pharmacy, Zhejiang Ocean University, Zhoushan, China
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36
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Kilonzo-Nthenge A, Liu S, Yannam S, Patras A. Atmospheric Cold Plasma Inactivation of Salmonella and Escherichia coli on the Surface of Golden Delicious Apples. Front Nutr 2018; 5:120. [PMID: 30619867 PMCID: PMC6297369 DOI: 10.3389/fnut.2018.00120] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 11/19/2018] [Indexed: 11/13/2022] Open
Abstract
The contamination of fruits with human pathogens is a reoccurring concern in the fresh produce industry. Atmospheric cold plasma (ACP) is a potential alternate to customary approaches for non-thermal decontamination of foods. In this study, the efficacy of a dielectric barrier discharge ACP system against Salmonella (Salmonella Typhimurium, ATCC 13311; Salmonella Choleraesuis, ATCC 10708) and Escherichia coli (ATCC 25922, ATCC 11775) was explored. For each bacteria, a two-strain mixture at 8 log10 CFU/ml was spot inoculated on the surface of Golden Delicious apples, air dried, and exposed to ACP at a fixed distance of 35 mm, input power of 200 W for 30, 60, 120, 180, and 240 s. Bacterial inactivation was achieved in all treatment times with highest reduction of 5.3 log10 CFU/cm2 for Salmonella and 5.5 log10 CFU/cm2 for E. coli. Our results showed that reductions were interrelated to exposure time and ranged from 1.3 to 5.3 and 0.6 to 5.5 log10 CFU/cm2 for Salmonella and E. coli, respectively. Salmonella and E. coli significantly decreased (>5.0 log) at 180 and 240 s as compared to 30, 60, and 120 s exposure. Microbial inactivation data was modeled by using Weibull distribution. These findings demonstrate the potential of ACP as a postharvest technology to effectively reduce pathogens on apples, with reference to Salmonella and E. coli.
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Affiliation(s)
- Agnes Kilonzo-Nthenge
- Department of Human Sciences, Tennessee State University, Nashville, TN, United States
| | - Siqin Liu
- Department of Agricultural and Environmental Sciences, College of Agriculture, Tennessee State University, Nashville, TN, United States
| | - Sudheer Yannam
- Department of Agricultural and Environmental Sciences, College of Agriculture, Tennessee State University, Nashville, TN, United States
| | - Ankit Patras
- Department of Agricultural and Environmental Sciences, College of Agriculture, Tennessee State University, Nashville, TN, United States
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Niemira BA, Boyd G, Sites J. Cold Plasma Inactivation of Escherichia coli O157:H7 Biofilms. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2018. [DOI: 10.3389/fsufs.2018.00047] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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Los A, Ziuzina D, Bourke P. Current and Future Technologies for Microbiological Decontamination of Cereal Grains. J Food Sci 2018; 83:1484-1493. [PMID: 29799123 DOI: 10.1111/1750-3841.14181] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 04/07/2018] [Accepted: 04/10/2018] [Indexed: 11/26/2022]
Abstract
Cereal grains are the most important staple foods for mankind worldwide. The constantly increasing annual production and yield is matched by demand for cereals, which is expected to increase drastically along with the global population growth. A critical food safety and quality issue is to minimize the microbiological contamination of grains as it affects cereals both quantitatively and qualitatively. Microorganisms present in cereals can affect the safety, quality, and functional properties of grains. Some molds have the potential to produce harmful mycotoxins and pose a serious health risk for consumers. Therefore, it is essential to reduce cereal grain contamination to the minimum to ensure safety both for human and animal consumption. Current production of cereals relies heavily on pesticides input, however, numerous harmful effects on human health and on the environment highlight the need for more sustainable pest management and agricultural methods. This review evaluates microbiological risks, as well as currently used and potential technologies for microbiological decontamination of cereal grains.
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Affiliation(s)
- Agata Los
- Food and Health Research Centre, School of Food Science and Environmental Health, Dublin Inst. of Technology, Dublin 1, Ireland
| | - Dana Ziuzina
- Food and Health Research Centre, School of Food Science and Environmental Health, Dublin Inst. of Technology, Dublin 1, Ireland
| | - Paula Bourke
- Food and Health Research Centre, School of Food Science and Environmental Health, Dublin Inst. of Technology, Dublin 1, Ireland
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Elimination of Salmonella enterica on common stainless steel food contact surfaces using UV-C and atmospheric pressure plasma jet. Food Control 2018. [DOI: 10.1016/j.foodcont.2017.11.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Sarangapani C, Patange A, Bourke P, Keener K, Cullen P. Recent Advances in the Application of Cold Plasma Technology in Foods. Annu Rev Food Sci Technol 2018; 9:609-629. [DOI: 10.1146/annurev-food-030117-012517] [Citation(s) in RCA: 94] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Apurva Patange
- BioPlasma Research Group, Dublin Institute of Technology, Dublin, Ireland
| | - Paula Bourke
- BioPlasma Research Group, Dublin Institute of Technology, Dublin, Ireland
| | - Kevin Keener
- Center for Crop Utilization Research, Iowa State University, Ames, Iowa 50011, USA
| | - P.J. Cullen
- BioPlasma Research Group, Dublin Institute of Technology, Dublin, Ireland
- Department of Chemical and Environmental Engineering, University of Nottingham, Nottingham, NG7 2RD, United Kingdom
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Cold atmospheric pressure plasma causes protein denaturation and endoplasmic reticulum stress in Saccharomyces cerevisiae. Appl Microbiol Biotechnol 2018; 102:2279-2288. [PMID: 29356871 DOI: 10.1007/s00253-018-8758-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 12/11/2017] [Accepted: 12/17/2017] [Indexed: 12/14/2022]
Abstract
Cold atmospheric pressure plasma (CAP) does not cause thermal damage or generate toxic residues; hence, it is projected as an alternative agent for sterilization in food and pharmaceutical industries. The fungicidal effects of CAP have not yet been investigated as extensively as its bactericidal effects. We herein examined the effects of CAP on yeast proteins using a new CAP system with an improved processing capacity. We demonstrated that protein ubiquitination and the formation of protein aggregates were induced in the cytoplasm of yeast cells by the CAP treatment. GFP-tagged Tsa1 and Ssa1, an H2O2-responsive molecular chaperone and constitutively expressed Hsp70, respectively, formed cytoplasmic foci in CAP-treated cells. Furthermore, Tsa1 was essential for the formation of Ssa1-GFP foci. These results indicate that the denaturation of yeast proteins was caused by CAP, at least partially, in a H2O2-dependent manner. Furthermore, misfolded protein levels in the endoplasmic reticulum (ER) and the oligomerization of Ire1, a key sensor of ER stress, were enhanced by the treatment with CAP, indicating that CAP causes ER stress in yeast cells as a specific phenomenon to eukaryotic cells. The pretreatment of yeast cells at 37 °C significantly alleviated cell death caused by CAP. Our results strongly suggest that the induction of protein denaturation is a primary mechanism of the fungicidal effects of CAP.
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Controlling Brochothrix thermosphacta as a spoilage risk using in-package atmospheric cold plasma. Food Microbiol 2017; 66:48-54. [DOI: 10.1016/j.fm.2017.04.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Revised: 02/21/2017] [Accepted: 04/02/2017] [Indexed: 11/18/2022]
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Tracking the Penetration of Plasma Reactive Species in Tissue Models. Trends Biotechnol 2017; 36:594-602. [PMID: 28843839 DOI: 10.1016/j.tibtech.2017.07.012] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 07/27/2017] [Accepted: 07/31/2017] [Indexed: 01/01/2023]
Abstract
Electrically generated cold atmospheric plasma is being intensively researched for novel applications in biology and medicine. Significant attention is being given to reactive oxygen and nitrogen species (RONS), initially generated upon plasma-air interactions, and subsequently delivered to biological systems. Effects of plasma exposure are observed to millimeter depths within tissue. However, the exact nature of the initial plasma-tissue interactions remains unknown, including RONS speciation and delivery depth, or how plasma-derived RONS intervene in biological processes. Herein, we focus on current research using tissue and cell models to learn more about the plasma delivery of RONS into biological environments. We argue that this research is vital in underpinning the knowledge required to realize the full potential of plasma in biology and medicine.
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Bourke P, Ziuzina D, Han L, Cullen PJ, Gilmore BF. Microbiological interactions with cold plasma. J Appl Microbiol 2017; 123:308-324. [PMID: 28245092 DOI: 10.1111/jam.13429] [Citation(s) in RCA: 188] [Impact Index Per Article: 26.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 01/31/2017] [Accepted: 02/13/2017] [Indexed: 11/30/2022]
Abstract
There is a diverse range of microbiological challenges facing the food, healthcare and clinical sectors. The increasing and pervasive resistance to broad-spectrum antibiotics and health-related concerns with many biocidal agents drives research for novel and complementary antimicrobial approaches. Biofilms display increased mechanical and antimicrobial stability and are the subject of extensive research. Cold plasmas (CP) have rapidly evolved as a technology for microbial decontamination, wound healing and cancer treatment, owing to the chemical and bio-active radicals generated known collectively as reactive oxygen and nitrogen species. This review outlines the basics of CP technology and discusses the interactions with a range of microbiological targets. Advances in mechanistic insights are presented and applications to food and clinical issues are discussed. The possibility of tailoring CP to control specific microbiological challenges is apparent. This review focuses on microbiological issues in relation to food- and healthcare-associated human infections, the role of CP in their elimination and the current status of plasma mechanisms of action.
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Affiliation(s)
- P Bourke
- Plasma Research Group, School of Food Science and Environmental Health, Dublin Institute of Technology, Dublin 1, Ireland
| | - D Ziuzina
- Plasma Research Group, School of Food Science and Environmental Health, Dublin Institute of Technology, Dublin 1, Ireland
| | - L Han
- Plasma Research Group, School of Food Science and Environmental Health, Dublin Institute of Technology, Dublin 1, Ireland
| | - P J Cullen
- Plasma Research Group, School of Food Science and Environmental Health, Dublin Institute of Technology, Dublin 1, Ireland.,School of Chemical Engineering, UNSW, Sydney, NSW, Australia
| | - B F Gilmore
- School of Pharmacy, Queen's University Belfast, Medical Biology Centre, Belfast, UK
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Misra N, Jo C. Applications of cold plasma technology for microbiological safety in meat industry. Trends Food Sci Technol 2017. [DOI: 10.1016/j.tifs.2017.04.005] [Citation(s) in RCA: 105] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Itooka K, Takahashi K, Izawa S. Fluorescence microscopic analysis of antifungal effects of cold atmospheric pressure plasma in Saccharomyces cerevisiae. Appl Microbiol Biotechnol 2016; 100:9295-9304. [PMID: 27544759 DOI: 10.1007/s00253-016-7783-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2016] [Revised: 07/24/2016] [Accepted: 08/03/2016] [Indexed: 01/08/2023]
Abstract
Cold atmospheric pressure plasma (CAP) has potential to be utilized as an alternative method for sterilization in food industries without thermal damage or toxic residues. In contrast to the bactericidal effects of CAP, information regarding the efficacy of CAP against eukaryotic microorganisms is very limited. Therefore, herein we investigated the effects of CAP on the budding yeast Saccharomyces cerevisiae, with a focus on the cellular response to CAP. The CAP treatment caused oxidative stress responses including the nuclear accumulation of the oxidative stress responsive transcription factor Yap1, mitochondrial fragmentation, and enhanced intracellular oxidation. Yeast cells also induced the expression of heat shock protein (HSP) genes and formation of Hsp104 aggregates when treated with CAP, suggesting that CAP denatures proteins. As phenomena unique to eukaryotic cells, the formation of cytoplasmic mRNP granules such as processing bodies and stress granules and changes in the intracellular localization of Ire1 were caused by the treatment with CAP, indicating that translational repression and endoplasmic reticulum (ER) stress were induced by the CAP treatment. These results suggest that the fungicidal effects of CAP are attributed to the multiple severe stresses.
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Affiliation(s)
- Koki Itooka
- Laboratory of Microbial Technology, Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Kyoto, 606-8585, Japan
| | - Kazuo Takahashi
- Electronic Material Science Laboratory, Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Kyoto, 606-8585, Japan
| | - Shingo Izawa
- Laboratory of Microbial Technology, Graduate School of Science and Technology, Kyoto Institute of Technology, Matsugasaki, Kyoto, 606-8585, Japan.
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Han L, Ziuzina D, Heslin C, Boehm D, Patange A, Sango DM, Valdramidis VP, Cullen PJ, Bourke P. Controlling Microbial Safety Challenges of Meat Using High Voltage Atmospheric Cold Plasma. Front Microbiol 2016; 7:977. [PMID: 27446018 PMCID: PMC4916165 DOI: 10.3389/fmicb.2016.00977] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Accepted: 06/06/2016] [Indexed: 12/22/2022] Open
Abstract
Atmospheric cold plasma (ACP) is a non-thermal technology, effective against a wide range of pathogenic microorganisms. Inactivation efficacy results from plasma generated reactive species. These may interact with any organic components in a test matrix including the target microorganism, thus food components may exert a protective effect against the antimicrobial mode of action. The effect of an in-package high voltage ACP process applied in conjunction with common meat processing MAP gas compositions as well as bacteria type and meat model media composition have been investigated to determine the applicability of this technology for decontamination of safety challenges associated with meat products. E. coli, L. monocytogenes, and S. aureus in PBS were undetectable after 60 s of treatment at 80 kVRMS in air, while ACP treatment of the contaminated meat model required post-treatment refrigeration to retain antimicrobial effect. The nutritive components in the meat model exerted a protective effect during treatment, where 300 s ACP exposure yielded a maximum reduction of 1.5 log using a high oxygen atmosphere, whilst using air and high nitrogen atmospheres yielded lower antimicrobial efficacy. Furthermore, an ROS assay was performed to understand the protective effects observed using the meat model. This revealed that nutritive components inhibited penetration of ROS into bacterial cells. This knowledge can assist the optimization of meat decontamination using ACP technology where interactions with all components of the food matrix require evaluation.
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Affiliation(s)
- Lu Han
- School of Food Science and Environmental Health, Dublin Institute of Technology Dublin, Ireland
| | - Dana Ziuzina
- School of Food Science and Environmental Health, Dublin Institute of Technology Dublin, Ireland
| | - Caitlin Heslin
- School of Food Science and Environmental Health, Dublin Institute of Technology Dublin, Ireland
| | - Daniela Boehm
- School of Food Science and Environmental Health, Dublin Institute of Technology Dublin, Ireland
| | - Apurva Patange
- School of Food Science and Environmental Health, Dublin Institute of Technology Dublin, Ireland
| | - David M Sango
- Department of Food Studies and Environmental Health, Faculty of Health Sciences, University of Malta Msida, Malta
| | - Vasilis P Valdramidis
- Department of Food Studies and Environmental Health, Faculty of Health Sciences, University of Malta Msida, Malta
| | - Patrick J Cullen
- School of Food Science and Environmental Health, Dublin Institute of TechnologyDublin, Ireland; School of Chemical Engineering, University of New South WalesSydney, NSW, Australia
| | - Paula Bourke
- School of Food Science and Environmental Health, Dublin Institute of Technology Dublin, Ireland
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Scholtz V, Pazlarova J, Souskova H, Khun J, Julak J. Nonthermal plasma--A tool for decontamination and disinfection. Biotechnol Adv 2015; 33:1108-19. [PMID: 25595663 DOI: 10.1016/j.biotechadv.2015.01.002] [Citation(s) in RCA: 286] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Revised: 12/29/2014] [Accepted: 01/07/2015] [Indexed: 02/07/2023]
Abstract
By definition, the nonthermal plasma (NTP) is partially ionized gas where the energy is stored mostly in the free electrons and the overall temperature remains low. NTP is widely used for many years in various applications such as low-temperature plasma chemistry, removal of gaseous pollutants, in gas-discharge lamps or surface modification. However, during the last ten years, NTP usage expanded to new biological areas of application like plasma microorganisms' inactivation, ready-to-eat food preparation, biofilm degradation or in healthcare, where it seems to be important for the treatment of cancer cells and in the initiation of apoptosis, prion inactivation, prevention of nosocomial infections or in the therapy of infected wounds. These areas are presented and documented in this paper as a review of representative publications.
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Affiliation(s)
- Vladimir Scholtz
- Department of Physics and Measurements, University of Chemistry and Technology, Prague, Czech Republic.
| | - Jarmila Pazlarova
- Department of Biochemistry and Microbiology, University of Chemistry and Technology, Prague, Czech Republic
| | - Hana Souskova
- Department of Computing and Control Engineering, University of Chemistry and Technology, Prague, Czech Republic
| | - Josef Khun
- Department of Physics and Measurements, University of Chemistry and Technology, Prague, Czech Republic
| | - Jaroslav Julak
- Institute of Immunology and Microbiology, 1st Faculty of Medicine, Charles University in Prague, Czech Republic
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