DetoxFungiV1, Main, Exploration, bibRecord, 000158

Inactivation Efficacies and Mechanisms of Gas Plasma and Plasma-Activated Water against Aspergillus flavus Spores and Biofilms: a Comparative Study.

Identifieur interne : 000158 ( Main/Exploration ); précédent : 000157; suivant : 000159

Inactivation Efficacies and Mechanisms of Gas Plasma and Plasma-Activated Water against Aspergillus flavus Spores and Biofilms: a Comparative Study.

Auteurs : Agata Los [Irlande (pays)] ; Dana Ziuzina [Irlande (pays)] ; Daniela Boehm [Irlande (pays)] ; Patrick J. Cullen [Irlande (pays), Australie] ; Paula Bourke [Irlande (pays), Royaume-Uni]

Source :

Applied and environmental microbiology [ 1098-5336 ] ; 2020.

RBID : pubmed:32086309

Descripteurs français

KwdFr :
- Antifongiques (pharmacologie), Aspergillus flavus (effets des médicaments et des substances chimiques), Aspergillus flavus (physiologie), Biofilms (effets des médicaments et des substances chimiques), Contamination des aliments (prévention et contrôle), Eau (pharmacologie), Gaz plasmas (pharmacologie), Numération de colonies microbiennes (MeSH), Spores fongiques (effets des médicaments et des substances chimiques), Spores fongiques (physiologie).
MESH :
- effets des médicaments et des substances chimiques : Aspergillus flavus, Biofilms, Spores fongiques.
- pharmacologie : Antifongiques, Eau, Gaz plasmas.
- physiologie : Aspergillus flavus, Spores fongiques.
- prévention et contrôle : Contamination des aliments.
- Numération de colonies microbiennes.

English descriptors

KwdEn :
- Antifungal Agents (pharmacology), Aspergillus flavus (drug effects), Aspergillus flavus (physiology), Biofilms (drug effects), Colony Count, Microbial (MeSH), Food Contamination (prevention & control), Plasma Gases (pharmacology), Spores, Fungal (drug effects), Spores, Fungal (physiology), Water (pharmacology).
MESH :
- chemical , pharmacology : Antifungal Agents, Plasma Gases, Water.
- drug effects : Aspergillus flavus, Biofilms, Spores, Fungal.
- physiology : Aspergillus flavus, Spores, Fungal.
- prevention & control : Food Contamination.
- Colony Count, Microbial.

Abstract

Atmospheric cold plasma (ACP) treatment is an emerging food technology for product safety and quality retention, shelf-life extension, and sustainable processing. The activated chemical species of ACP can act rapidly against microorganisms without leaving chemical residues on food surfaces. The main objectives of this study were to investigate the efficiency and mechanisms of inactivation of fungal spores and biofilms by ACP and to understand the effects of the gas-mediated and liquid-mediated modes of application against important fungal contaminants. Aspergillus flavus was selected as the model microorganism. A. flavus spores were exposed to either gas plasma (GP) or plasma-activated water (PAW), whereas gas plasma alone was used to treat A. flavus biofilms. This study demonstrated that both GP and PAW treatments independently resulted in significant decreases of A. flavus metabolic activity and spore counts, with maximal reductions of 2.2 and 0.6 log₁₀ units for GP and PAW, respectively. The characterization of the reactive oxygen and nitrogen species in PAW and spore suspensions indicated that the concentration of secondary reactive species was an important factor influencing the antimicrobial activity of the treatment. The biofilm study showed that GP had detrimental effects on biofilm structure; however, the initial inoculum concentration prior to biofilm formation can be a crucial factor influencing the fungicidal effects of ACP.IMPORTANCE The production of mycotoxin-free food remains a challenge in both human and animal food chains. A. flavus, a mycotoxin-producing contaminant of economically important crops, was selected as the model microorganism to investigate the efficiency and mechanisms of ACP technology against fungal contaminants of food. Our study directly compares the antifungal properties of gas plasma (GP) and plasma-activated water (PAW) against fungi as well as reporting the effects of ACP treatment on biofilms produced by A. flavus.

DOI: 10.1128/AEM.02619-19
PubMed: 32086309
PubMed Central: PMC7170485

Affiliations:

Links toward previous steps (curation, corpus...)

to stream Main, to step Corpus: 000195
to stream Main, to step Curation: 000195

Le document en format XML

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<term>Biofilms (drug effects)</term>
<term>Colony Count, Microbial (MeSH)</term>
<term>Food Contamination (prevention & control)</term>
<term>Plasma Gases (pharmacology)</term>
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<term>Gaz plasmas (pharmacologie)</term>
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<front><div type="abstract" xml:lang="en">Atmospheric cold plasma (ACP) treatment is an emerging food technology for product safety and quality retention, shelf-life extension, and sustainable processing. The activated chemical species of ACP can act rapidly against microorganisms without leaving chemical residues on food surfaces. The main objectives of this study were to investigate the efficiency and mechanisms of inactivation of fungal spores and biofilms by ACP and to understand the effects of the gas-mediated and liquid-mediated modes of application against important fungal contaminants. <i>Aspergillus flavus</i>
 was selected as the model microorganism. <i>A. flavus</i>
 spores were exposed to either gas plasma (GP) or plasma-activated water (PAW), whereas gas plasma alone was used to treat <i>A. flavus</i>
 biofilms. This study demonstrated that both GP and PAW treatments independently resulted in significant decreases of <i>A. flavus</i>
 metabolic activity and spore counts, with maximal reductions of 2.2 and 0.6 log<sub>10</sub>
 units for GP and PAW, respectively. The characterization of the reactive oxygen and nitrogen species in PAW and spore suspensions indicated that the concentration of secondary reactive species was an important factor influencing the antimicrobial activity of the treatment. The biofilm study showed that GP had detrimental effects on biofilm structure; however, the initial inoculum concentration prior to biofilm formation can be a crucial factor influencing the fungicidal effects of ACP.<b>IMPORTANCE</b>
 The production of mycotoxin-free food remains a challenge in both human and animal food chains. <i>A. flavus</i>
, a mycotoxin-producing contaminant of economically important crops, was selected as the model microorganism to investigate the efficiency and mechanisms of ACP technology against fungal contaminants of food. Our study directly compares the antifungal properties of gas plasma (GP) and plasma-activated water (PAW) against fungi as well as reporting the effects of ACP treatment on biofilms produced by <i>A. flavus</i>
.</div>
</front>
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<ArticleTitle>Inactivation Efficacies and Mechanisms of Gas Plasma and Plasma-Activated Water against Aspergillus flavus Spores and Biofilms: a Comparative Study.</ArticleTitle>
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<Abstract><AbstractText>Atmospheric cold plasma (ACP) treatment is an emerging food technology for product safety and quality retention, shelf-life extension, and sustainable processing. The activated chemical species of ACP can act rapidly against microorganisms without leaving chemical residues on food surfaces. The main objectives of this study were to investigate the efficiency and mechanisms of inactivation of fungal spores and biofilms by ACP and to understand the effects of the gas-mediated and liquid-mediated modes of application against important fungal contaminants. <i>Aspergillus flavus</i>
 was selected as the model microorganism. <i>A. flavus</i>
 spores were exposed to either gas plasma (GP) or plasma-activated water (PAW), whereas gas plasma alone was used to treat <i>A. flavus</i>
 biofilms. This study demonstrated that both GP and PAW treatments independently resulted in significant decreases of <i>A. flavus</i>
 metabolic activity and spore counts, with maximal reductions of 2.2 and 0.6 log<sub>10</sub>
 units for GP and PAW, respectively. The characterization of the reactive oxygen and nitrogen species in PAW and spore suspensions indicated that the concentration of secondary reactive species was an important factor influencing the antimicrobial activity of the treatment. The biofilm study showed that GP had detrimental effects on biofilm structure; however, the initial inoculum concentration prior to biofilm formation can be a crucial factor influencing the fungicidal effects of ACP.<b>IMPORTANCE</b>
 The production of mycotoxin-free food remains a challenge in both human and animal food chains. <i>A. flavus</i>
, a mycotoxin-producing contaminant of economically important crops, was selected as the model microorganism to investigate the efficiency and mechanisms of ACP technology against fungal contaminants of food. Our study directly compares the antifungal properties of gas plasma (GP) and plasma-activated water (PAW) against fungi as well as reporting the effects of ACP treatment on biofilms produced by <i>A. flavus</i>
.</AbstractText>
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</AffiliationInfo>
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</AffiliationInfo>
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</AffiliationInfo>
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</AffiliationInfo>
<AffiliationInfo><Affiliation>School of Biological Sciences, Institute for Global Food Security, Queens University Belfast, Belfast, United Kingdom.</Affiliation>
</AffiliationInfo>
<AffiliationInfo><Affiliation>Plasma Research Group, School of Biosystems and Food Engineering, University College Dublin, Belfield, Dublin, Ireland.</Affiliation>
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</MeshHeading>
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<Keyword MajorTopicYN="Y">grains</Keyword>
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<Month>11</Month>
<Day>19</Day>
</PubMedPubDate>
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Inactivation Efficacies and Mechanisms of Gas Plasma and Plasma-Activated Water against Aspergillus flavus Spores and Biofilms: a Comparative Study.

Inactivation Efficacies and Mechanisms of Gas Plasma and Plasma-Activated Water against Aspergillus flavus Spores and Biofilms: a Comparative Study.

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