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Muro-Fraguas I, Fernández-Gómez P, Múgica-Vidal R, Sainz-García A, Sainz-García E, Oliveira M, González-Raurich M, López M, Rojo-Bezares B, López M, Alba-Elías F. Durability Assessment of a Plasma-Polymerized Coating with Anti-Biofilm Activity against L. monocytogenes Subjected to Repeated Sanitization. Foods 2021; 10:2849. [PMID: 34829129 PMCID: PMC8625322 DOI: 10.3390/foods10112849] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 11/12/2021] [Accepted: 11/16/2021] [Indexed: 12/25/2022] Open
Abstract
Biofilm formation on food-contact surfaces is a matter of major concern causing food safety and spoilage issues to this sector. The aim of this study was to assess the durability of the anti-biofilm capacity of a plasma-polymerized coating composed of a base coating of (3-aminopropyl)triethoxysilane (APTES) and a functional coating of acrylic acid (AcAc). Coated and uncoated AISI 316 stainless steel (SS) plates were subjected to five sanitization cycles with sodium hypochlorite (0.05%) and peracetic acid (0.5%). The effectiveness of the coating for the inhibition of multi-strain Listeria monocytogenes biofilm formation was confirmed using a three-strain cocktail, which was grown on the SS plates at 12 °C for 6 days. Compared to the uncoated SS, relative biofilm productions of 14.6% on the non-sanitized coating, 27.9% on the coating after sanitization with sodium hypochlorite, and 82.3% on the coating after sanitization with peracetic acid were obtained. Morphological and physicochemical characterization of the coatings suggested that the greater anti-biofilm effectiveness after sanitization with sodium hypochlorite was due to the high pH of this solution, which caused a deprotonation of the carboxylic acid groups of the functional coating. This fact conferred it a strong hydrophilicity and negatively charged its surface, which was favorable for preventing bacterial attachment and biofilm formation.
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Affiliation(s)
- Ignacio Muro-Fraguas
- Department of Mechanical Engineering, University of La Rioja, C/San José de Calasanz 31, 26004 Logroño, Spain; (I.M.-F.); (A.S.-G.); (E.S.-G.); (F.A.-E.)
| | - Paula Fernández-Gómez
- Department of Food Hygiene and Technology, Institute of Food Science and Technology, Campus de Vegazana s/n, Universidad de León, 24071 León, Spain; (P.F.-G.); (M.O.); (M.G.-R.); (M.L.)
| | - Rodolfo Múgica-Vidal
- Department of Mechanical Engineering, University of La Rioja, C/San José de Calasanz 31, 26004 Logroño, Spain; (I.M.-F.); (A.S.-G.); (E.S.-G.); (F.A.-E.)
| | - Ana Sainz-García
- Department of Mechanical Engineering, University of La Rioja, C/San José de Calasanz 31, 26004 Logroño, Spain; (I.M.-F.); (A.S.-G.); (E.S.-G.); (F.A.-E.)
| | - Elisa Sainz-García
- Department of Mechanical Engineering, University of La Rioja, C/San José de Calasanz 31, 26004 Logroño, Spain; (I.M.-F.); (A.S.-G.); (E.S.-G.); (F.A.-E.)
| | - Márcia Oliveira
- Department of Food Hygiene and Technology, Institute of Food Science and Technology, Campus de Vegazana s/n, Universidad de León, 24071 León, Spain; (P.F.-G.); (M.O.); (M.G.-R.); (M.L.)
| | - Montserrat González-Raurich
- Department of Food Hygiene and Technology, Institute of Food Science and Technology, Campus de Vegazana s/n, Universidad de León, 24071 León, Spain; (P.F.-G.); (M.O.); (M.G.-R.); (M.L.)
| | - María López
- Molecular Microbiology Area, Center for Biomedical Research of La Rioja (CIBIR), C/Piqueras 98, 26006 Logroño, Spain; (M.L.); (B.R.-B.)
| | - Beatriz Rojo-Bezares
- Molecular Microbiology Area, Center for Biomedical Research of La Rioja (CIBIR), C/Piqueras 98, 26006 Logroño, Spain; (M.L.); (B.R.-B.)
| | - Mercedes López
- Department of Food Hygiene and Technology, Institute of Food Science and Technology, Campus de Vegazana s/n, Universidad de León, 24071 León, Spain; (P.F.-G.); (M.O.); (M.G.-R.); (M.L.)
| | - Fernando Alba-Elías
- Department of Mechanical Engineering, University of La Rioja, C/San José de Calasanz 31, 26004 Logroño, Spain; (I.M.-F.); (A.S.-G.); (E.S.-G.); (F.A.-E.)
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Zhang J, Wang D, Sun J, Sun Z, Liu F, Du L, Wang D. Synergistic Antibiofilm Effects of Ultrasound and Phenyllactic Acid against Staphylococcus aureus and Salmonella enteritidis. Foods 2021; 10:foods10092171. [PMID: 34574281 PMCID: PMC8466041 DOI: 10.3390/foods10092171] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/23/2021] [Accepted: 08/30/2021] [Indexed: 11/21/2022] Open
Abstract
This study evaluated the effect of the combination of ultrasound and phenyllactic acid (PLA) on inactivating Staphylococcus aureus and Salmonella enteritidis biofilm cells and determined the possible antibiofilm mechanism. S. aureus and S. enteritidis biofilm cells were separately treated with ultrasound (US, 270 W), phenyllactic acid (PLA, 0.5% and 1%), and their combination (US + 0.5% PLA, and US + 1% PLA) for 5, 10, 20, 30, and 60 min. Biofilm inactivation, polysaccharide, and respiratory chain dehydrogenase assays were conducted. US and PLA had a synergistic effect on inactivating bacterial cells in S. aureus and S. enteritidis biofilms. The combination of US and PLA significantly decreased the contents of soluble and insoluble polysaccharides and the activity of respiratory chain dehydrogenase in the biofilm cells compared to the single treatment. Confocal laser scanning microscopy, scanning electron microscopy, and intracellular adenosine-triphosphate (ATP) analyses indicated that the combination of US and PLA seriously destroyed the cell membrane integrity of the S. aureus and S. enteritidis biofilms and caused the leakage of intracellular ATP. These findings demonstrated the synergistic antibiofilm effect of US combined with PLA and offered a research basis for its application in the food industry.
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Affiliation(s)
- Jiaojiao Zhang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China;
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Nanjing 210014, China; (D.W.); (J.S.); (Z.S.); (D.W.)
| | - Debao Wang
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Nanjing 210014, China; (D.W.); (J.S.); (Z.S.); (D.W.)
| | - Jinyue Sun
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Nanjing 210014, China; (D.W.); (J.S.); (Z.S.); (D.W.)
| | - Zhilan Sun
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Nanjing 210014, China; (D.W.); (J.S.); (Z.S.); (D.W.)
| | - Fang Liu
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China;
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Nanjing 210014, China; (D.W.); (J.S.); (Z.S.); (D.W.)
- Correspondence: (F.L.); (L.D.)
| | - Lihui Du
- Key Laboratory of Grains and Oils Quality Control and Processing, Collaborative Innovation Center for Modern Grain Circulation and Safety, College of Food Science and Engineering, Nanjing University of Finance and Economics, Nanjing 210023, China
- Correspondence: (F.L.); (L.D.)
| | - Daoying Wang
- Key Lab of Food Quality and Safety of Jiangsu Province-State Key Laboratory Breeding Base, Nanjing 210014, China; (D.W.); (J.S.); (Z.S.); (D.W.)
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3
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Efficacy and Mechanism of Ultrasound Combined with Slightly Acidic Electrolyzed Water for Inactivating Escherichia coli. J FOOD QUALITY 2021. [DOI: 10.1155/2021/6689751] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
In the present study, the synergetic effect and mechanism of ultrasound (US) and slightly acidic electrolyzed water (SAEW) on the inactivation of Escherichia coli (E. coli) were evaluated. The results showed that US combined with SAEW treatment showed higher sanitizing efficacy for reducing E. coli than US and SAEW alone treatment. US and US combined with SAEW treatments resulted in smaller particle size of E. coli compared to the control and SAEW treatment. In addition, US combined with SAEW treatment induced the highest potassium leakage. However, the highest protein leakage was recorded in US treatment. Moreover, scanning and transmission electron microscopy analysis revealed that the greatest damage of the appearance and ultrastructure of E. coli was achieved after US combined with SAEW treatment. The synergetic effect was also confirmed by CLSM analysis. Fluorescence spectroscopy suggested that treatments of US, SAEW, and US combined with SAEW changed protein conformation of E. coli. Overall, the present study demonstrated that the sterilization mechanism of US combined with SAEW treatment was decreasing the particle size and disrupting the permeability of cell membrane and the cytoplasmic ultrastructure as well as changing protein conformation of E. coli.
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Zhang Y, Cui G, Meng Y, Wang Y, Hun X. Chemiluminescence assay for Listeria monocytogenes based on Cu/Co/Ni ternary nanocatalyst coupled with penicillin as generic capturing agent. LUMINESCENCE 2020; 36:11-19. [PMID: 32602594 DOI: 10.1002/bio.3908] [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] [Received: 05/04/2020] [Revised: 06/16/2020] [Accepted: 06/26/2020] [Indexed: 11/08/2022]
Abstract
Bacterial pathogen control is important in seafood production. In this study, a Cu/Co/Ni ternary nanoalloy (Cu/Co/Ni TNA) was synthesized using the oleylamine reducing method. It was found that Cu/Co/Ni TNA greatly enhanced the chemiluminescence (CL) signal of the hydroxylamine-O-sulfonic acid (HOSA)-luminol system. The CL properties of Cu/Co/Ni TNA were investigated systemically. The possible CL mechanism also was intensively investigated. Based on the enhanced CL phenomenon of Cu/Co/Ni TNA, a Cu/Co/Ni TNA, penicillin, and anti-L. monocytogenes (Listeria monocytogenes) antibody-based sandwich complex assay for detection of L. monocytogenes was established. In this sandwich CL assay, penicillin was employed to capture and enrich pathogenic bacteria with penicillin-binding proteins (PBPs) while anti-L. monocytogenes antibody was adopted as the specific recognition molecule to recognize L. monocytogenes. L. monocytogenes was detected sensitively based on this new Cu/Co/Ni TNA-HOSA-luminol CL system. The CL intensity was proportional to the L. monocytogenes concentration ranging from 2.0 × 102 CFU ml-1 to 3.0 × 107 CFU ml-1 and the limit of detection wa 70 CFU ml-1 . The reliability and potential applications of our method was verified by comparison with official methods and recovery tests in environment and food samples.
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Affiliation(s)
- Yue Zhang
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE; Shandong Key Laboratory of Biochemical Analysis; Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong; College of Marine Science and Biological Engineering; Institute of Life Sciences and Biomass Resources; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, China
| | - Gaoxi Cui
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE; Shandong Key Laboratory of Biochemical Analysis; Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong; College of Marine Science and Biological Engineering; Institute of Life Sciences and Biomass Resources; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, China
| | - Yuchan Meng
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE; Shandong Key Laboratory of Biochemical Analysis; Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong; College of Marine Science and Biological Engineering; Institute of Life Sciences and Biomass Resources; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, China
| | - Yujing Wang
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE; Shandong Key Laboratory of Biochemical Analysis; Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong; College of Marine Science and Biological Engineering; Institute of Life Sciences and Biomass Resources; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, China
| | - Xu Hun
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, MOE; Shandong Key Laboratory of Biochemical Analysis; Key Laboratory of Analytical Chemistry for Life Science in Universities of Shandong; College of Marine Science and Biological Engineering; Institute of Life Sciences and Biomass Resources; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, China
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Sanitizing efficacy and antimicrobial mechanism of peracetic acid against histamine-producing bacterium, Morganella psychrotolerans. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2020.109263] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Guo L, Sun Y, Zhu Y, Wang B, Xu L, Huang M, Li Y, Sun J. The antibacterial mechanism of ultrasound in combination with sodium hypochlorite in the control of Escherichia coli. Food Res Int 2019; 129:108887. [PMID: 32036906 DOI: 10.1016/j.foodres.2019.108887] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 11/22/2019] [Accepted: 12/03/2019] [Indexed: 01/18/2023]
Abstract
In the present study, the action mechanism of ultrasound (US) combined with sodium hypochlorite (SH) against Escherichia coli was illustrated by different analysis, including reduction, particle size distribution, scanning electron microscopy (SEM), transmission electron microscopy (TEM), K+ leakage, confocal laser scanning microscopy (CLSM) and fluorescence spectroscopy of Escherichia coli. The results showed that ultrasound improved the antimicrobial effect of SH in control of E. coli. No significant difference was obtained in reduction of E. coli, CLSM analysis and K+ leakage between US + SH30 (US + 30 ppm SH) and SH50 (50 ppm SH) treatment. Smaller particle size was recorded in US and US + SH30 treatment. The changes of morphology and intracellular organization of E. coli cells as a result of these treatments were confirmed by SEM and TEM analyses. Fluorescence spectroscopy results indicated SH30, US + SH30 and SH50 treatment caused the burial of tyrosine residues and tryptophan residues as well as increase of hydrophobicity. Therefore, the mechanism of US + SH30 treatment against E. coli involved decreased particle size, damaged membrane and changes of intracellular organization and protein conformation.
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Affiliation(s)
- Liping Guo
- College of Food Science and Engineering, and Shandong Reseach Center for Meat Food Quality Control, Qingdao Agricultural University, Qingdao 266109, Shandong, People's Republic of China
| | - Yongcai Sun
- College of Food Science and Engineering, and Shandong Reseach Center for Meat Food Quality Control, Qingdao Agricultural University, Qingdao 266109, Shandong, People's Republic of China
| | - Yinglian Zhu
- College of Food Science and Engineering, and Shandong Reseach Center for Meat Food Quality Control, Qingdao Agricultural University, Qingdao 266109, Shandong, People's Republic of China
| | - Baowei Wang
- College of Food Science and Engineering, and Shandong Reseach Center for Meat Food Quality Control, Qingdao Agricultural University, Qingdao 266109, Shandong, People's Republic of China
| | - Lin Xu
- College of Food Science and Engineering, and Shandong Reseach Center for Meat Food Quality Control, Qingdao Agricultural University, Qingdao 266109, Shandong, People's Republic of China
| | - Ming Huang
- Nanjing Innovation Center of Meat Products Processing, and College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, Jiangsu, People's Republic of China
| | - Yufeng Li
- Poultry Institute of Shandong Academy of Agricultural Science, Jinan 250023, Shandong, People's Republic of China
| | - Jingxin Sun
- College of Food Science and Engineering, and Shandong Reseach Center for Meat Food Quality Control, Qingdao Agricultural University, Qingdao 266109, Shandong, People's Republic of China.
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Rivera‐Garcia A, Santos‐Ferro L, Ramirez‐Orejel JC, Agredano‐Moreno LT, Jimenez‐Garcia LF, Paez‐Esquiliano D, Andrade‐Esquivel E, Cano‐Buendia JA. The effect of neutral electrolyzed water as a disinfectant of eggshells artificially contaminated with Listeria monocytogenes. Food Sci Nutr 2019; 7:2252-2260. [PMID: 31367353 PMCID: PMC6657710 DOI: 10.1002/fsn3.1053] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 04/02/2019] [Accepted: 04/10/2019] [Indexed: 11/10/2022] Open
Abstract
Neutral electrolyzed water (NEW) was tested as a disinfectant against Listeria monocytogenes on the surface of table eggs. Eggs were collected from a single Bovans White flock and were exposed to L. monocytogenes. Artificially contaminated eggs were divided into three different treatment groups: NEW, 2% citric acid solution (CAS), and saline solution (SS). To evaluate the bactericidal effect, the Mexican norm for antimicrobial activity determination protocol was performed. The observed bactericidal effect was compared against those obtained from CAS and SS. Bacterial cells present on the eggshells were quantified. NEW exhibited a significantly higher bactericidal effect than CAS when evaluated on the surfaces of chicken eggshells (6.11 log10CFU/ml reduction in vitro and a 2.18 log10 CFU/egg reduction on eggs vs. 1.06 log10CFU/ml in vitro reduction and 1.74 log10CFU/egg). Additionally, CAS was found to react with the carbonate egg shield, resulting in a loss of cuticle integrity. Mineral content of NEW-treated eggshells was similar to SS-treated eggshells; however, CAS-treated eggshells showed a significant decrease in phosphorous concentration compared to NEW treatment. In this study, we demonstrated the effect of NEW and CAS on the integrity of the L. monocytogenes wall using transmission electron microscopy. To the best of our knowledge, this is the first report of the effect of NEW against L. monocytogenes on eggshells. Our results show that NEW is a viable alternative solution for the disinfection of table eggs that does not affect the cuticle or shell.
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Affiliation(s)
- Andres Rivera‐Garcia
- Facultad de Medicina Veterinaria y Zootecnia, Department of Microbiology and ImmunologyUniversidad Nacional Autónoma de Mexico (UNAM)Mexico CityMexico
| | - Liliana Santos‐Ferro
- Facultad de Medicina Veterinaria y Zootecnia, Department of Microbiology and ImmunologyUniversidad Nacional Autónoma de Mexico (UNAM)Mexico CityMexico
| | - Juan C. Ramirez‐Orejel
- Facultad de Medicina Veterinaria y Zootecnia, Department of Animal Nutrition and BiochemistryUniversidad Nacional Autónoma de México (UNAM)Mexico CityMexico
| | - Lourdes T. Agredano‐Moreno
- Cell Nanobiology Laboratory, Department of Cell Biology. Faculty of SciencesUniversidad Nacional Autónoma de México (UNAM)Mexico CityMexico
| | - Luis F. Jimenez‐Garcia
- Cell Nanobiology Laboratory, Department of Cell Biology. Faculty of SciencesUniversidad Nacional Autónoma de México (UNAM)Mexico CityMexico
| | - David Paez‐Esquiliano
- Facultad de Medicina Veterinaria y Zootecnia, Department of Physiology and PharmacologyUniversidad Nacional Autónoma de México (UNAM)Mexico CityMexico
| | | | - Jose A. Cano‐Buendia
- Facultad de Medicina Veterinaria y Zootecnia, Department of Microbiology and ImmunologyUniversidad Nacional Autónoma de Mexico (UNAM)Mexico CityMexico
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Meireles A, Faia S, Giaouris E, Simões M. Antimicrobial susceptibility and sessile behaviour of bacteria isolated from a minimally processed vegetables plant. BIOFOULING 2018; 34:1150-1160. [PMID: 30663892 DOI: 10.1080/08927014.2018.1554742] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 11/24/2018] [Accepted: 11/24/2018] [Indexed: 06/09/2023]
Abstract
In this study, 20 heterotrophic bacteria from a minimally processed vegetables (MPV) plant were tested for their susceptibilities to five antibiotics (tetracycline, erythromycin, ampicillin, levofloxacin and ciprofloxacin), their (co)aggregation abilities and their survival under gastric simulated conditions. Peracetic acid (PA) and sodium hypochlorite (SH), both at 50 ppm, were evaluated for their abilities to control biofilms of these bacteria. In general, the Gram-negative bacteria were found to be more resistant to the selected antibiotics. Two isolates, Rhanella aquatilis and Stenotrophomonas maltophilia, demonstrated multidrug resistance. Only Rhodococcus erythropolis presented aggregation potential, while no bacterium survived under the gastric conditions. The biofilm experiments showed PA as less efficient than SH in killing biofilms and neither of the disinfectants was able to fully eliminate the biofilms. Significant regrowth was observed for most of the biofilms. The results indicate that alternative and/or complementary disinfection strategies are required to guarantee food safety.
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Affiliation(s)
- Ana Meireles
- a LEPABE, Department of Chemical Engineering, Faculty of Engineering , University of Porto , Porto , Portugal
| | - Sílvia Faia
- a LEPABE, Department of Chemical Engineering, Faculty of Engineering , University of Porto , Porto , Portugal
| | - Efstathios Giaouris
- b Department of Food Science and Nutrition, Faculty of the Environment , University of the Aegean , Myrina , Lemnos , Greece
| | - Manuel Simões
- a LEPABE, Department of Chemical Engineering, Faculty of Engineering , University of Porto , Porto , Portugal
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Meireles A, Fulgêncio R, Machado I, Mergulhão F, Melo L, Simões M. Characterization of the heterotrophic bacteria from a minimally processed vegetables plant. Lebensm Wiss Technol 2017. [DOI: 10.1016/j.lwt.2017.01.038] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Meireles A, Ferreira C, Melo L, Simões M. Comparative stability and efficacy of selected chlorine-based biocides against Escherichia coli in planktonic and biofilm states. Food Res Int 2017; 102:511-518. [PMID: 29195980 DOI: 10.1016/j.foodres.2017.09.033] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 09/07/2017] [Accepted: 09/09/2017] [Indexed: 11/18/2022]
Abstract
Microbial contamination is an unavoidable problem in industrial processes. Sodium hypochlorite (SH) is the most common biocide used for industrial disinfection. However, in view of the current societal concerns on environmental and public health aspects, there is a trend to reduce the use of this biocide as it can lead to the formation of organochlorinated carcinogenic compounds. In this work the efficacy of SH was assessed against Escherichia coli in planktonic and biofilm states and compared with three alternative chlorine-based biocides: neutral electrolyzed oxidizing water (NEOW), chlorine dioxide (CD) and sodium dichloroisocyanurate (NaDCC). The planktonic tests revealed that SH had the fastest antimicrobial action, NaDCC exhibited the highest antimicrobial rate and NEOW caused the highest antimicrobial effects. Additionally, NEOW was the biocide that allowed the highest formation of reactive oxygen species (ROS). In biofilm control, NEOW and CD were the most efficient biocides causing 3.26 and 3.20 log CFU·cm-2 reduction, respectively. In terms of stability for chlorine depletion, NEOW had the longest decay time for chlorine loss (70days at 5°C) and the lowest chlorine loss rate (0.013ppm·min-1 at 5°C). CD and NaDCC had equivalent stability. The overall results demonstrated NEOW as a good alternative to SH due to its higher antimicrobial effects and lower chlorine depletion over time.
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Affiliation(s)
- Ana Meireles
- LEPABE, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal
| | - Carla Ferreira
- LEPABE, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal
| | - Luís Melo
- LEPABE, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal
| | - Manuel Simões
- LEPABE, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal.
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11
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Wambui JM, Karuri EG, Ojiambo JA, Njage PMK. Application of Probabilistic Modeling to Quantify the Reduction Levels of Hepatocellular Carcinoma Risk Attributable to Chronic Aflatoxins Exposure. Nutr Cancer 2016; 69:1-13. [DOI: 10.1080/01635581.2017.1247892] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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12
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Malheiro J, Gomes I, Borges A, Bastos MMSM, Maillard JY, Borges F, Simões M. Phytochemical profiling as a solution to palliate disinfectant limitations. BIOFOULING 2016; 32:1007-1016. [PMID: 27552663 DOI: 10.1080/08927014.2016.1220550] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Accepted: 07/30/2016] [Indexed: 06/06/2023]
Abstract
The indiscriminate use of biocides for general disinfection has contributed to the increased incidence of antimicrobial tolerant microorganisms. This study aims to assess the potential of seven phytochemicals (tyrosol, caffeic acid, ferulic acid, cinnamaldehyde, coumaric acid, cinnamic acid and eugenol) in the control of planktonic and sessile cells of Staphylococcus aureus and Escherichia coli. Cinnamaldehyde and eugenol showed antimicrobial properties, minimum inhibitory concentrations of 3-5 and 5-12 mM and minimum bactericidal concentrations of 10-12 and 10-14 mM against S. aureus and E. coli, respectively. Cinnamic acid was able to completely control adhered bacteria with effects comparable to peracetic acid and sodium hypochlorite and it was more effective than hydrogen peroxide (all at 10 mM). This phytochemical caused significant changes in bacterial membrane hydrophilicity. The observed effectiveness of phytochemicals makes them interesting alternatives and/or complementary products to commonly used biocidal products. Cinnamic acid is of particular interest for the control of sessile cells.
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Affiliation(s)
- J Malheiro
- a LEPABE, Department of Chemical Engineering, Faculty of Engineering of University of Porto , Porto , Portugal
- b CIQUP, Department of Chemistry and Biochemistry, Faculty of Sciences University of Porto , Porto , Portugal
- c Cardiff School of Pharmacy and Pharmaceutical Sciences, Cardiff University , Cardiff , UK
| | - I Gomes
- a LEPABE, Department of Chemical Engineering, Faculty of Engineering of University of Porto , Porto , Portugal
| | - A Borges
- a LEPABE, Department of Chemical Engineering, Faculty of Engineering of University of Porto , Porto , Portugal
- b CIQUP, Department of Chemistry and Biochemistry, Faculty of Sciences University of Porto , Porto , Portugal
| | - M M S M Bastos
- a LEPABE, Department of Chemical Engineering, Faculty of Engineering of University of Porto , Porto , Portugal
| | - J-Y Maillard
- c Cardiff School of Pharmacy and Pharmaceutical Sciences, Cardiff University , Cardiff , UK
| | - F Borges
- b CIQUP, Department of Chemistry and Biochemistry, Faculty of Sciences University of Porto , Porto , Portugal
| | - M Simões
- a LEPABE, Department of Chemical Engineering, Faculty of Engineering of University of Porto , Porto , Portugal
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Gomes IB, Malheiro J, Mergulhão F, Maillard JY, Simões M. Comparison of the efficacy of natural-based and synthetic biocides to disinfect silicone and stainless steel surfaces. Pathog Dis 2016; 74:ftw014. [PMID: 26926153 DOI: 10.1093/femspd/ftw014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/22/2016] [Indexed: 01/22/2023] Open
Abstract
New biocidal solutions are needed to combat effectively the evolution of microbes developing antibiotic resistance while having a low or no environmental toxicity impact. This work aims to assess the efficacy of commonly used biocides and natural-based compounds on the disinfection of silicone and stainless steel (SS) surfaces seeded with differentStaphylococcus aureusstrains. Minimum inhibitory concentration was determined for synthetic (benzalkonium chloride-BAC, glutaraldehyde-GTA,ortho-phthalaldehyde-OPA and peracetic acid-PAA) and natural-based (cuminaldehyde-CUM), eugenol-EUG and indole-3-carbinol-I3C) biocides by the microdilution method. The efficacy of selected biocides at MIC, 10 × MIC and 5500 mg/L (representative in-use concentration) on the disinfection of sessileS. aureuson silicone and SS was assessed by viable counting. Silicone surfaces were harder to disinfect than SS. GTA, OPA and PAA yielded complete CFU reduction of sessile cells for all test concentrations as well as BAC at 10 × MIC and 5500 mg/L. CUM was the least efficient compound. EUG was efficient for SS disinfection, regardless of strains and concentrations tested. I3C at 10 × MIC and 5500 mg/L was able to cause total CFU reduction of silicone and SS deposited bacteria. Although not so efficient as synthetic compounds, the natural-based biocides are promising to be used in disinfectant formulations, particularly I3C and EUG.
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Affiliation(s)
- I B Gomes
- LEPABE, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal
| | - J Malheiro
- LEPABE, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal
| | - F Mergulhão
- LEPABE, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal
| | - J-Y Maillard
- School of Pharmacy and Pharmaceutical Sciences, Cardiff University, Cardiff, Wales CF10 3NB, UK
| | - M Simões
- LEPABE, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, s/n, 4200-465 Porto, Portugal
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