The antimicrobial efficacy of remote cold atmospheric plasma effluent against single and mixed bacterial biofilms of varying age

Kadri, Hani El; Costello, Katherine M.; Thomas, P. R.; Wantock, Thomas; Sandison, Gavin; Harle, Thomas; Fabris, Andrea Lucca; Gutierrez-Merino, Jorge; Velliou, Eirini

doi:10.1016/j.foodres.2021.110126

Cited by 16 publications

(13 citation statements)

References 111 publications

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“…a treatment which damages the outer membrane followed by one which acts on internal components of the cell could result in enhanced inactivation [11] , [23] . However, both ultrasound and nisin treatments, alone or combined, like other minimal processing approaches, are milder than classical decontamination methods and may therefore present a mild, sublethal stress allowing for post-treatment survival and potential antimicrobial resistance (AMR) development [5] , [24] , [25] , [26] , [27] , [28] . This is especially concerning for pathogenic bacteria commonly associated with ready-to-eat food products such as Listeria spp.…”

Section: Introductionmentioning

confidence: 99%

The effect of ultrasound treatment in combination with nisin on the inactivation of Listeria innocua and Escherichia coli

Costello

Velliou

Gutierrez-Merino

et al. 2021

Ultrasonics Sonochemistry

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Highlights A multi-frequency study of ultrasound (US) and nisin for microbial inactivation. US impacts E. coli at 500 kHz only; L. innocua resists all frequencies studied. Nisin applied before US enhances inactivation of E. coli but not when applied after. Attributed to outer membrane destabilisation by US allowing nisin penetration. System structure (viscosity) reduces US inactivation efficacy.

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Section: Introductionmentioning

confidence: 99%

The effect of ultrasound treatment in combination with nisin on the inactivation of Listeria innocua and Escherichia coli

Costello

Velliou

Gutierrez-Merino

et al. 2021

Ultrasonics Sonochemistry

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“…Microbes reside in mixed-species BFs, in which organism growth and metabolism are different from those in monospecies BFs 20,21 . Increased quantity and diversity of the species present increase the complexity of mixed-species BFs and enhance antimicrobial resistance 22,23 . The treatment of mixed-species BFs is more difficult and challenging than that of monospecies BFs.…”

Section: Discussionmentioning

confidence: 99%

Effects of lipid emulsions on the formation of Escherichia coli–Candida albicans mixed-species biofilms on PVC

Duan

Lei

et al. 2021

Sci Rep

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Patients receiving lipid emulsions are at increased risk of contracting catheter-related bloodstream infections (CRBSIs) in the clinic. More than 15% of CRBSIs are polymicrobial. The objective of this study was to explore the effects of lipid emulsions on the formation of Escherichia coli (E. coli)–Candida albicans (C. albicans) mixed-species biofilms (BFs) on polyvinyl chloride (PVC) surfaces and the underlying mechanism. Mixed-species BFs were produced by coculturing E. coli and C. albicans with PVC in various concentrations of lipid emulsions. Crystal violet staining and XTT assays were performed to test the mixed-species BF biomass and the viability of microbes in the BFs. The microstructures of the BFs were observed by an approach that combined confocal laser scanning microscopy, fluorescence in situ hybridization, and scanning electron microscopy. The study found that lipid emulsions could promote the formation of E. coli–C. albicans mixed-species BFs, especially with 10% lipid emulsions. The mechanism by which lipid emulsions promote mixed-species BF formation may involve significant upregulation of the expression of the flhDC, iha, HTA1, and HWP1 genes, which are associated with bacterial motility, adhesion, and BF formation. The results derived from this study necessitate strict aseptic precautions when handling lipid emulsions and avoiding the use of high concentrations of lipid emulsions for as long as possible.

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“…60 Plasma treatment had little impact on biofilm removal. 64 Besides, high dosage of plasma treatment made protein denaturation leading to inhibition of thermophilic bacteria. 49 45 s plasma treatment significantly inactivated aerobic microorganisms on blueberries.…”

Section: Enterobacteriaceaementioning

confidence: 99%

Corona Discharge Power of Plasma Treatment Influence on the Physicochemical and Microbial Quality of Enoki Mushroom (Flammulina velutipes)

Minh¹

2022

J. Pure Appl. Microbiol.

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Plasma treatment was widely known as an effective technology applied for contact-surface decontamination. Enoki (Flammulina velutipes) was an edible-medicinal mushroom with different phytochemicals and bioactive components beneficial for human health. Enoki mushroom had high respiration rate therefore it was highly perishable after harvesting. Moreover, it was greatly susceptible to microbial contamination but it was not feasible to be decontaminated by normal water washing. It’s urgent to extend shelf-life and control microbial criteria on this mushroom in dry manner without aqueous treatment. Corona discharge plasma was among 4 kinds of diverse cold atmospheric pressure plasma sources widely applied in food industry. This study demonstrated the influence of corona discharge plasma power values (control, 120, 150, 180, 210 W) on the physicochemical and microbial characteristics of Enoki mushroom during 10 days of storage at ambient temperature. Results showed that Enoki mushroom should be treated at 150 W of corona discharge plasma power to retain weight loss, total soluble solid, vitamin C in acceptable values while reducing total Aerobic count, Coliform, Enterobacteriaceae as much as possible. At the 10th day of storage, the weight loss, total soluble solid, vitamin C, total Aerobic count, Coliform, Enterobacteriaceae were recorded at 3.35±0.07%, 6.98±0.03 oBrix, 14.81±0.04 mg/100 g, 4.71±0.05 log CFU/g, 3.17±0.02 log CFU/g, 2.13±0.01 CFU/g, respectively. Findings of this research proved that corona discharge plasma pretreatment would be appropriate to maintain physicochemical properties and retard microbial loads on Enoki mushroom during preservation.

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The antimicrobial efficacy of remote cold atmospheric plasma effluent against single and mixed bacterial biofilms of varying age

Cited by 16 publications

References 111 publications

The effect of ultrasound treatment in combination with nisin on the inactivation of Listeria innocua and Escherichia coli

The effect of ultrasound treatment in combination with nisin on the inactivation of Listeria innocua and Escherichia coli

Effects of lipid emulsions on the formation of Escherichia coli–Candida albicans mixed-species biofilms on PVC

Corona Discharge Power of Plasma Treatment Influence on the Physicochemical and Microbial Quality of Enoki Mushroom (Flammulina velutipes)

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