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Nogueira R, Cabo ML, García-Sanmartín L, Sánchez-Ruiloba L, Rodríguez-Herrera JJ. Risk factor-based clustering of Listeria monocytogenes in food processing environments using principal component analysis. Food Res Int 2023; 170:112989. [PMID: 37316020 DOI: 10.1016/j.foodres.2023.112989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 05/11/2023] [Accepted: 05/15/2023] [Indexed: 06/16/2023]
Abstract
Listeria monocytogenes has a range of strategies that allow it to persist as biofilms in food processing environments (FPE), making it a pathogen of concern to the food industry. The properties of these biofilms are highly variable among strains, and this significantly affects the risk of food contamination. The present study therefore aims to conduct a proof-of-concept study to cluster strains of L. monocytogenes by risk potential using principal component analysis, a multivariate approach. A set of 22 strains, isolated from food processing environments, were typed by serogrouping and pulsed-field gel electrophoresis, showing a relatively high diversity. They were characterized in terms of several biofilm properties that might pose a potential risk of food contamination. The properties studied were tolerance to benzalkonium chloride (BAC), the structural parameters of biofilms (biomass, surface area, maximum and average thickness, surface to biovolume ratio and roughness coefficient) measured by confocal laser scanning microscopy and (3) transfer of biofilm cells to smoked salmon. The PCA correlation circle revealed that the tolerance of biofilms to BAC was positively correlated with roughness, but negatively with biomass parameters. On the contrary, cell transfers were not related to three-dimensional structural parameters, which suggests the role of other variables yet unexplored. Additionally, hierarchical clustering grouped strains into three different clusters. One of them included the strains with high tolerance to BAC and roughness. Another one consisted of strains with enhanced transfer ability, whereas the third cluster contained those that stood out for the thickness of biofilms. The present study represents a novel and effective way to classify L. monocytogenes strains according to biofilm properties that condition the potential risk of reaching the consumer through food contamination. It would thus allow the selection of strains representative of different worst-case scenarios for future studies in support of QMRA and decision-making analysis.
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Affiliation(s)
- Raquel Nogueira
- Laboratory of Microbiology and Technology of Marine Products (MICROTEC), Instituto de Investigaciones Marinas (IIM), CSIC, Eduardo Cabello 6, 36208 Vigo, Spain
| | - Marta López Cabo
- Laboratory of Microbiology and Technology of Marine Products (MICROTEC), Instituto de Investigaciones Marinas (IIM), CSIC, Eduardo Cabello 6, 36208 Vigo, Spain
| | - Lucía García-Sanmartín
- Laboratory of Microbiology and Technology of Marine Products (MICROTEC), Instituto de Investigaciones Marinas (IIM), CSIC, Eduardo Cabello 6, 36208 Vigo, Spain
| | - Lucía Sánchez-Ruiloba
- Optical Microscopy and Image Analysis Facility, Scientific-Technical Support Unit, Instituto de Investigaciones Marinas (IIM), CSIC, Eduardo Cabello 6, 36208 Vigo, Spain
| | - Juan José Rodríguez-Herrera
- Laboratory of Microbiology and Technology of Marine Products (MICROTEC), Instituto de Investigaciones Marinas (IIM), CSIC, Eduardo Cabello 6, 36208 Vigo, Spain.
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He J, Gao X, Huang H, Hao J. Proposal and Verification of the Theory of Layer-by-Layer Elimination of Biofilm in Listeria monocytogenes. Foods 2023; 12:foods12071361. [PMID: 37048183 PMCID: PMC10093742 DOI: 10.3390/foods12071361] [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: 03/11/2023] [Accepted: 03/21/2023] [Indexed: 04/14/2023] Open
Abstract
Biofilms are microbial communities that represent a high abundance of microbial life forms on Earth. Within biofilms, structural changes during clearance processes occur in three spatial and temporal dimensions; therefore, microscopy and quantitative image analysis are essential in elucidating their function. Here, we present confocal laser scanning microscopy (CLSM) in conjunction with ISA-2 software analysis for the automated and high-throughput quantification, analysis, and visualisation of biofilm interiors and overall biofilm properties in three spatial and temporal dimensions. This paper discusses the removal process of Listeria monocytogenes (LM) biofilms using slightly acidic electrolytic water, non-electrolytic hypochlorite water, and alternating the use of strongly acidic and strongly alkaline electrolytic water. The results show that the biofilm gradually thins and gutters from the initial viscous dense and thick morphology under the action of either biocide. This process is consistent with first-level kinetics. After CLSM filming to observe the biofilm structure, analysis software was used to process and quantify the biovolume, average biofilm thickness, biofilm roughness and other indicators; fluorescence enzyme markers were used to verify the remaining amount of extracellular nucleic acid. In this study, we proposed and validated the theory of layer-by-layer elimination of LM biofilm.
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Affiliation(s)
- Jialin He
- College of Food Science and Biology, Hebei University of Science and Technology, No. 26 Yuxiang Street, Shijiazhuang 050018, China
| | - Xiangyu Gao
- College of Food Science and Biology, Hebei University of Science and Technology, No. 26 Yuxiang Street, Shijiazhuang 050018, China
| | - Hanbing Huang
- College of Food Science and Biology, Hebei University of Science and Technology, No. 26 Yuxiang Street, Shijiazhuang 050018, China
| | - Jianxiong Hao
- College of Food Science and Biology, Hebei University of Science and Technology, No. 26 Yuxiang Street, Shijiazhuang 050018, China
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3
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Mazaheri T, Cervantes-Huamán B, Turitich L, Ripolles-Avila C, Rodríguez-Jerez J. Removal of Listeria monocytogenes biofilms on stainless steel surfaces through conventional and alternative cleaning solutions. Int J Food Microbiol 2022; 381:109888. [DOI: 10.1016/j.ijfoodmicro.2022.109888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 08/16/2022] [Accepted: 08/22/2022] [Indexed: 10/31/2022]
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Wang Z, Ma Y, Li Z, Wang Y, Liu Y, Dong Q. Characterization of Listeria monocytogenes biofilm formation kinetics and biofilm transfer to cantaloupe surfaces. Food Res Int 2022; 161:111839. [DOI: 10.1016/j.foodres.2022.111839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 08/16/2022] [Accepted: 08/21/2022] [Indexed: 11/30/2022]
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Rodríguez-López P, Rodríguez-Herrera JJ, López Cabo M. Architectural Features and Resistance to Food-Grade Disinfectants in Listeria monocytogenes- Pseudomonas spp. Dual-Species Biofilms. Front Microbiol 2022; 13:917964. [PMID: 35756028 PMCID: PMC9218357 DOI: 10.3389/fmicb.2022.917964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Accepted: 05/04/2022] [Indexed: 11/13/2022] Open
Abstract
Listeria monocytogenes is considered a foodborne pathogen of serious concern capable of forming multispecies biofilms with other bacterial species, such as Pseudomonas spp., adhered onto stainless steel (SS) surfaces. In an attempt to link the biofilms' morphology and resistance to biocides, dual-species biofilms of L. monocytogenes, in co-culture with either Pseudomonas aeruginosa, Pseudomonas fluorescens, or Pseudomonas putida, were assayed to ascertain their morphological characteristics and resistance toward benzalkonium chloride (BAC) and neutral electrolyzed water (NEW). Epifluorescence microscopy analysis revealed that each dual-species biofilm was distributed differently over the SS surface and that these differences were attributable to the presence of Pseudomonas spp. Confocal laser scanning microscopy (CLSM) assays demonstrated that despite these differences in distribution, all biofilms had similar maximum thicknesses. Along with this, colocalization analyses showed a strong trend of L. monocytogenes to share location within the biofilm with all Pseudomonas assayed whilst the latter distributed throughout the surface independently of the presence of L. monocytogenes, a fact that was especially evident in those biofilms in which cell clusters were present. Finally, a modified Gompertz equation was used to fit biofilms' BAC and NEW dose-response data. Outcomes demonstrated that L. monocytogenes was less susceptible to BAC when co-cultured with P. aeruginosa or P. fluorescens, whereas susceptibility to NEW was reduced in all three dual-species biofilms, which can be attributable to both the mechanism of action of the biocide and the architectural features of each biofilm. Therefore, the results herein provided can be used to optimize already existing and develop novel target-specific sanitation treatments based on the mechanism of action of the biocide and the biofilms' species composition and structure.
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Affiliation(s)
- Pedro Rodríguez-López
- Laboratory of Microbiology and Technology of Marine Products (MICROTEC), Instituto de Investigacións Mariñas (IIM-CSIC), Vigo, Spain
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Xu JG, Hu HX, Han BZ, Chen JY. Interactions between Salmonella Enteritidis and food processing facility isolate Bacillus paramycoides B5 in dual-species biofilms. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2021.113053] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Rodríguez-López P, Barrenengoa AE, Pascual-Sáez S, Cabo ML. Efficacy of Synthetic Furanones on Listeria monocytogenes Biofilm Formation. Foods 2019; 8:E647. [PMID: 31817522 PMCID: PMC6963563 DOI: 10.3390/foods8120647] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 12/02/2019] [Accepted: 12/04/2019] [Indexed: 02/07/2023] Open
Abstract
Furanones are analogues of acylated homoserine lactones with proven antifouling activity in both Gram-positive and Gram-negative bacteria though the interference of various quorum sensing pathways. In an attempt to find new strategies to prevent and control Listeria monocytogenes biofilm formation on stainless steel (SS) surfaces, different concentrations of six synthetic furanones were applied on biofilms formed by strains isolated from food, environmental, and clinical sources grown onto AISI 316 SS coupons. Among the furanones tested, (Z-)-4-Bromo-5-(bromomethylene)-2(5H)-furanone and 3,4-Dichloro-2(5H)-furanone significantly (p < 0.05) reduced the adhesion capacity (>1 log CFU cm-2) in 24 h treated biofilms. Moreover, individually conducted experiments demonstrated that (Z-)-4-Bromo-5-(bromomethylene)-2(5H)-furanone was able to not only significantly (p < 0.05) prevent L. monocytogenes adhesion but also to reduce the growth rate of planktonic cells up to 48 h in a dose-dependent manner. LIVE/DEAD staining followed by epifluorescence microscopy visualisation confirmed these results show an alteration of the structure of the biofilm in furanone-treated samples. Additionally, it was demonstrated that 20 µmol L-1 of 3,4-Dichloro-2(5H)-furanone dosed at 0, 24 and 96 h was able to maintain a lower level of adhered cells (>1 log CFU cm-2; p < 0.05). Since furanones do not pose a selective pressure on bacteria, these results represent an appealing novel strategy for the prevention of L. monocytogenes biofilm grown onto SS.
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Affiliation(s)
- Pedro Rodríguez-López
- Laboratory of Microbiology and Technology of Marine Products (MICROTEC), Instituto de Investigaciones Marinas (IIM-CSIC), C/Eduardo Cabello 6, 36208 Vigo, Spain; (P.R.-L.); (A.E.B.); (S.P.-S.)
- Department of Food and Drug, Università di Parma, Strada del Taglio 10, 43126 Parma, Italy
| | - Andrea Emparanza Barrenengoa
- Laboratory of Microbiology and Technology of Marine Products (MICROTEC), Instituto de Investigaciones Marinas (IIM-CSIC), C/Eduardo Cabello 6, 36208 Vigo, Spain; (P.R.-L.); (A.E.B.); (S.P.-S.)
| | - Sergio Pascual-Sáez
- Laboratory of Microbiology and Technology of Marine Products (MICROTEC), Instituto de Investigaciones Marinas (IIM-CSIC), C/Eduardo Cabello 6, 36208 Vigo, Spain; (P.R.-L.); (A.E.B.); (S.P.-S.)
| | - Marta López Cabo
- Laboratory of Microbiology and Technology of Marine Products (MICROTEC), Instituto de Investigaciones Marinas (IIM-CSIC), C/Eduardo Cabello 6, 36208 Vigo, Spain; (P.R.-L.); (A.E.B.); (S.P.-S.)
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8
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Vazquez-Armenta FJ, Hernandez-Oñate MA, Martinez-Tellez MA, Lopez-Zavala AA, Gonzalez-Aguilar GA, Gutierrez-Pacheco MM, Ayala-Zavala JF. Quercetin repressed the stress response factor (sigB) and virulence genes (prfA, actA, inlA, and inlC), lower the adhesion, and biofilm development of L. monocytogenes. Food Microbiol 2019; 87:103377. [PMID: 31948618 DOI: 10.1016/j.fm.2019.103377] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 10/18/2019] [Accepted: 11/12/2019] [Indexed: 02/06/2023]
Abstract
The present study explored the effect of quercetin on the expression of virulence genes actA, inlA, inlC, and their regulatory components, sigB and prfA, in L. monocytogenes. Furthermore, the physicochemical changes on the surface, membrane permeability, and biofilm formation of quercetin-treated bacteria were evaluated. An inhibitory dose-dependent effect of quercetin (0.1-0.8 mM) was observed on the cell attachment on stainless steel at 2 and 6 h at 37 °C. Quercetin at 0.8 mM prevented the biofilm formation on stainless steel surfaces after 6 h of incubation at 37 °C, while the untreated bacteria formed biofilms with a cell density of 5.1 Log CFU/cm2. The microscopic analysis evidenced that quercetin at 0.2 mM decreased the biovolume and covered area of the attached micro-colonies. Also, sigB, prfA, inlA, inlC, and actA genes were downregulated by 7-29 times lower compared to untreated bacteria. In addition, quercetin decreased the superficial cell charge, increased the membrane permeability, and its surface hydrophobicity. These results demonstrated that quercetin prevented biofilm formation, repressed the genes of stress and virulence of L. monocytogenes and also altered the physicochemical cell properties.
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Affiliation(s)
- F J Vazquez-Armenta
- Centro de Investigacion en Alimentacion y Desarrollo, A.C. Carretera Gustavo Enrique Astiazarán Rosas, No. 46 Col. La Victoria, Hermosillo, Sonora, 83304, Mexico
| | - M A Hernandez-Oñate
- CONACYT - Centro de Investigacion en Alimentacion y Desarrollo, A.C. Carretera Gustavo Enrique Astiazarán Rosas, No. 46 Col. La Victoria, Hermosillo, Sonora, 83304, Mexico
| | - M A Martinez-Tellez
- Centro de Investigacion en Alimentacion y Desarrollo, A.C. Carretera Gustavo Enrique Astiazarán Rosas, No. 46 Col. La Victoria, Hermosillo, Sonora, 83304, Mexico
| | - A A Lopez-Zavala
- Departamento de Ciencias Quimico Biologicas, Universidad de Sonora, Blvd. Rosales y Luis Encinas, Hermosillo, Sonora, 83000, Mexico
| | - G A Gonzalez-Aguilar
- Centro de Investigacion en Alimentacion y Desarrollo, A.C. Carretera Gustavo Enrique Astiazarán Rosas, No. 46 Col. La Victoria, Hermosillo, Sonora, 83304, Mexico
| | - M M Gutierrez-Pacheco
- Centro de Investigacion en Alimentacion y Desarrollo, A.C. Carretera Gustavo Enrique Astiazarán Rosas, No. 46 Col. La Victoria, Hermosillo, Sonora, 83304, Mexico
| | - J F Ayala-Zavala
- Centro de Investigacion en Alimentacion y Desarrollo, A.C. Carretera Gustavo Enrique Astiazarán Rosas, No. 46 Col. La Victoria, Hermosillo, Sonora, 83304, Mexico.
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9
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Rodríguez-Melcón C, Riesco-Peláez F, García-Fernández C, Alonso-Calleja C, Capita R. Susceptibility of Listeria monocytogenes planktonic cultures and biofilms to sodium hypochlorite and benzalkonium chloride. Food Microbiol 2019; 82:533-540. [PMID: 31027816 DOI: 10.1016/j.fm.2019.03.020] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 01/07/2019] [Accepted: 03/17/2019] [Indexed: 12/27/2022]
Abstract
The susceptibility of four L. monocytogenes isolates from pork to sodium hypochlorite (SHY) and benzalkonium chloride (BZK) was tested. Minimum inhibitory concentration (MIC) values of 3500 ppm (SHY), or between 3 ppm and 13 ppm (BZK), were found. Minimum bactericidal concentration (MBC) values ranged from 3500 ppm to 4500 ppm (SHY), and from 3 ppm to 14 ppm (BZK). The effect of SHY and BZK on the architecture and cellular viability of 24-h-old biofilms formed by such strains on polystyrene was determined through confocal laser scanning microscopy (CLSM) in conjunction with fluorescent dyes for live cells (SYTO 9) and dead cells (propidium iodide). Strains were able to form biofilm (biovolume values in the observation field of 14,161 μm2 ranged between 103,928.3 ± 6730.2 μm3 and 276,030.9 ± 42,291.9 μm3). Treatment of biofilms for 10 min with SHY (1MIC or 1.5MIC) or BZK (0.5MIC, 1MIC or 1.5MIC) decreased the biovolume of live (potentially dangerous) cells. SHY reduced the cellular viability of biofilms by more than 90%. On the other hand, BZK was able to remove most biofilm mass (live and dead cells), but decreased cellular viability only to a lesser extent, this suggesting strong biofilm detachment and dissemination of live cells.
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Affiliation(s)
- Cristina Rodríguez-Melcón
- Department of Food Hygiene and Technology, Veterinary Faculty, University of León, E-24071, León, Spain; Institute of Food Science and Technology, University of León, E-24071, León, Spain
| | - Félix Riesco-Peláez
- Department of Electrical Engineering and Systems Engineering and Automatic Control, University of León, E-24071, León, Spain
| | - Camino García-Fernández
- Department of Food Hygiene and Technology, Veterinary Faculty, University of León, E-24071, León, Spain; Institute of Food Science and Technology, University of León, E-24071, León, Spain
| | - Carlos Alonso-Calleja
- Department of Food Hygiene and Technology, Veterinary Faculty, University of León, E-24071, León, Spain; Institute of Food Science and Technology, University of León, E-24071, León, Spain
| | - Rosa Capita
- Department of Food Hygiene and Technology, Veterinary Faculty, University of León, E-24071, León, Spain; Institute of Food Science and Technology, University of León, E-24071, León, Spain.
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10
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Rodríguez-Melcón C, Riesco-Peláez F, Carballo J, García-Fernández C, Capita R, Alonso-Calleja C. Structure and viability of 24- and 72-h-old biofilms formed by four pathogenic bacteria on polystyrene and glass contact surfaces. Food Microbiol 2018; 76:513-517. [DOI: 10.1016/j.fm.2018.06.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Revised: 04/25/2018] [Accepted: 06/24/2018] [Indexed: 01/07/2023]
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11
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Keeney K, Trmcic A, Zhu Z, Delaquis P, Wang S. Stress survival islet 1 contributes to serotype-specific differences in biofilm formation in Listeria monocytogenes. Lett Appl Microbiol 2018; 67:530-536. [DOI: 10.1111/lam.13072] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 09/02/2018] [Accepted: 09/09/2018] [Indexed: 01/11/2023]
Affiliation(s)
- K. Keeney
- Food, Nutrition and Health; Faculty of Land and Food Systems; The University of British Columbia; Vancouver BC Canada
| | - A. Trmcic
- Food, Nutrition and Health; Faculty of Land and Food Systems; The University of British Columbia; Vancouver BC Canada
| | - Z. Zhu
- Food, Nutrition and Health; Faculty of Land and Food Systems; The University of British Columbia; Vancouver BC Canada
| | - P. Delaquis
- Agriculture and Agri-Food Canada; Summerland Research and Development Centre; Summerland BC Canada
| | - S. Wang
- Food, Nutrition and Health; Faculty of Land and Food Systems; The University of British Columbia; Vancouver BC Canada
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12
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Tan L, Zhao F, Han Q, Zhao A, Malakar PK, Liu H, Pan Y, Zhao Y. High Correlation Between Structure Development and Chemical Variation During Biofilm Formation by Vibrio parahaemolyticus. Front Microbiol 2018; 9:1881. [PMID: 30154782 PMCID: PMC6102384 DOI: 10.3389/fmicb.2018.01881] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Accepted: 07/26/2018] [Indexed: 01/10/2023] Open
Abstract
The complex three-dimensional structure of biofilms is supported by extracellular polymeric substances (EPSs) and additional insight on chemical variations in EPS and biofilm structure development will inform strategies for control of biofilms. Vibrio parahaemolyticus VPS36 biofilm development was studied using confocal laser scanning microscopy (CLSM) and Raman spectroscopy (RM). The structural parameters of the biofilm (biovolume, mean thickness, and porosity) were characterized by CLSM and the results showed that VPS36 biofilm formed dense structures after 48 h incubation. There were concurrent variations in carbohydrates and nucleic acids contents in the EPS as evidenced by RM. The Raman intensities of the chemical component in EPS, measured using Pearson's correlation coefficient, were positively correlated with biovolume and mean thickness, and negatively correlated with porosity. The Raman intensity for carbohydrates correlated closely with mean thickness (p-value < 0.01) and the Raman intensity for nucleic acid correlated closely with porosity (p-value < 0.01). Additional evidence for these correlations were confirmed using scanning electron microscopic (SEM) and crystal violet staining.
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Affiliation(s)
- Ling Tan
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, China
| | - Fei Zhao
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, China
| | - Qiao Han
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, China
| | - Aijing Zhao
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, China
| | - Pradeep K. Malakar
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, China
| | - Haiquan Liu
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, China
- Laboratory of Quality and Safety Risk Assessment for Aquatic Products on Storage and Preservation, Ministry of Agriculture, Shanghai, China
- Shanghai Engineering Research Center of Aquatic-Product Processing and Preservation, Shanghai, China
- Engineering Research Center of Food Thermal-Processing Technology, Shanghai Ocean University, Shanghai, China
| | - Yingjie Pan
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, China
- Laboratory of Quality and Safety Risk Assessment for Aquatic Products on Storage and Preservation, Ministry of Agriculture, Shanghai, China
- Shanghai Engineering Research Center of Aquatic-Product Processing and Preservation, Shanghai, China
| | - Yong Zhao
- College of Food Science and Technology, Shanghai Ocean University, Shanghai, China
- Laboratory of Quality and Safety Risk Assessment for Aquatic Products on Storage and Preservation, Ministry of Agriculture, Shanghai, China
- Shanghai Engineering Research Center of Aquatic-Product Processing and Preservation, Shanghai, China
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13
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Quercetin reduces adhesion and inhibits biofilm development by Listeria monocytogenes by reducing the amount of extracellular proteins. Food Control 2018. [DOI: 10.1016/j.foodcont.2018.02.041] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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14
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Balsa-Canto E, Vilas C, López-Núñez A, Mosquera-Fernández M, Briandet R, Cabo ML, Vázquez C. Modeling Reveals the Role of Aging and Glucose Uptake Impairment in L1A1 Listeria monocytogenes Biofilm Life Cycle. Front Microbiol 2017; 8:2118. [PMID: 29163410 PMCID: PMC5671982 DOI: 10.3389/fmicb.2017.02118] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 10/18/2017] [Indexed: 12/17/2022] Open
Abstract
Listeria monocytogenes is a food-borne pathogen that can persist in food processing plants by forming biofilms on abiotic surfaces. The benefits that bacteria can gain from living in a biofilm, i.e., protection from environmental factors and tolerance to biocides, have been linked to the biofilm structure. Different L. monocytogenes strains build biofilms with diverse structures, and the underlying mechanisms for that diversity are not yet fully known. This work combines quantitative image analysis, cell counts, nutrient uptake data and mathematical modeling to provide a mechanistic insight into the dynamics of the structure of biofilms formed by L. monocytogenes L1A1 (serotype 1/2a) strain. Confocal laser scanning microscopy (CLSM) and quantitative image analysis were used to characterize the structure of L1A1 biofilms throughout time. L1A1 forms flat, thick structures; damaged or dead cells start appearing early in deep layers of the biofilm and rapidly and massively loss biomass after 4 days. We proposed several reaction-diffusion models to explain the system dynamics. Model candidates describe biomass and nutrients evolution including mechanisms of growth and cell spreading, nutrients diffusion and uptake and biofilm decay. Data fitting was used to estimate unknown model parameters and to choose the most appropriate candidate model. Remarkably, standard reaction-diffusion models could not describe the biofilm dynamics. The selected model reveals that biofilm aging and glucose impaired uptake play a critical role in L1A1 L. monocytogenes biofilm life cycle.
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Affiliation(s)
- Eva Balsa-Canto
- (Bio)Process Engineering Group, IIM-CSIC Spanish National Research Council, Vigo, Spain
| | - Carlos Vilas
- (Bio)Process Engineering Group, IIM-CSIC Spanish National Research Council, Vigo, Spain
| | | | - Maruxa Mosquera-Fernández
- (Bio)Process Engineering Group, IIM-CSIC Spanish National Research Council, Vigo, Spain
- Microbiology Group, IIM-CSIC Spanish National Research Council, Vigo, Spain
| | - Romain Briandet
- Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, Massy, France
| | - Marta L. Cabo
- Microbiology Group, IIM-CSIC Spanish National Research Council, Vigo, Spain
| | - Carlos Vázquez
- Mathematics Department, ITMATI, CITIC, University of A Coruña, A Coruña, Spain
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