51
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Quorum sensing in food spoilage and natural-based strategies for its inhibition. Food Res Int 2019; 127:108754. [PMID: 31882100 DOI: 10.1016/j.foodres.2019.108754] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 09/27/2019] [Accepted: 10/13/2019] [Indexed: 10/25/2022]
Abstract
Food can harbor a variety of microorganisms including spoilage and pathogenic bacteria. Many bacterial processes, including production of degrading enzymes, virulence factors, and biofilm formation are known to depend on cell density through a process called quorum sensing (QS), in which cells communicate by synthesizing, detecting and reacting to small diffusible signaling molecules - autoinducers (AI). The disruption of QS could decisively contribute to control the expression of many harmful bacterial phenotypes. Several quorum sensing inhibitors (QSI) have been extensively studied, being many of them of natural origin. This review provides an analysis on the role of QS in food spoilage and biofilm formation within the food industry. QSI from natural sources are also reviewed towards their putative future applications to prolong shelf life of food products and decrease foodborne pathogenicity.
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52
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Wu S, Liu Y, Zhang H, Lei L. A new transformation method with nanographene oxides of antisense carrying yycG RNA improved antibacterial properties on methicillin-resistant Staphylococcus aureus biofilm. J Vet Med Sci 2019; 81:1540-1546. [PMID: 31447460 PMCID: PMC6863726 DOI: 10.1292/jvms.19-0216] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Staphylococcus aureus has the potential to opportunistically cause
infectious diseases. The aim of this study was to determine the antimicrobial effects of
novel graphene oxide (GO)-polyethylenimine (PEI)-based antisense yycG
(ASyycG) on the inhibition of methicillin-resistant S.
aureus (MRSA) biofilm formation. In current study, a novel GO-PEI-based
recombinant ASyycG vector transformation strategy was developed to
produce ASyycG. The mechanical features including zeta-potential and
particle size distributions were evaluated by: GO; GO-PEI and
GO-PEI-ASyycG. The recombinant ASyycG vector was
transformed into MRSA cells, and the expression levels of the yycF/G and
icaADB genes were determined and compared by quantitative real-time PCR
(qPCR) assays. The recombinant ASyycG plasmids were subsequently modified
with a gene encoding enhanced green fluorescent protein (ASyycG-eGFP) as
a reporter gene, and the transformation efficiency was assessed by the fluorescence
intensity. The biofilm biomass and bacterial viability of the MRSA strains were evaluated
by crystal violet assay, colony-forming unit assays and confocal laser scanning
microscopy. The results showed that the Z-average sizes of GO-PEI-ASyycG
were much larger than those of GO or GO-PEI. The GO-PEI-based strategy significantly
increased the efficiency of ASyycG transformation. The
GO-PEI-ASyycG-transformed MRSA strain had the lowest expression levels
of the biofilm formation-associated genes. Furthermore, GO-PEI-ASyycG
suppressed biofilm aggregation and improved bactericidal effects on the MRSA after 24 hr
of biofilm establishment. Our findings demonstrated that GO-PEI based antisense
yycG RNA will be an effective method for management of MRSA
infections.
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Affiliation(s)
- Shizhou Wu
- Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, 610041, China.,State Key Laboratory of Oral Diseases, Department of Preventive Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Yunjie Liu
- West China School of Public Health, Sichuan University, Chengdu, 610041, China
| | - Hui Zhang
- Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, 610041, China
| | - Lei Lei
- State Key Laboratory of Oral Diseases, Department of Preventive Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
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53
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Peng C, Hanawa T, Azam AH, LeBlanc C, Ung P, Matsuda T, Onishi H, Miyanaga K, Tanji Y. Silviavirus phage ɸMR003 displays a broad host range against methicillin-resistant Staphylococcus aureus of human origin. Appl Microbiol Biotechnol 2019; 103:7751-7765. [PMID: 31388727 DOI: 10.1007/s00253-019-10039-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 07/05/2019] [Accepted: 07/14/2019] [Indexed: 12/17/2022]
Abstract
The emergence of life-threatening methicillin-resistant Staphylococcus aureus (MRSA) has led to increased interest in the use of bacteriophages as an alternative therapy to antibiotics. The success of phage therapy is greatly dependent on the selected phage possessing a wide host range. This study describes phage ɸMR003 isolated from sewage influent at a municipal wastewater treatment plant in Tokyo, Japan. ɸMR003 could infect 97% of 104 healthcare- and community-associated MRSA strains tested, compared with 73% for phage ɸSA012, which has a broad host range against bovine mastitis S. aureus. Genome analysis revealed that ɸMR003 belongs to the genus Silviavirus which has not been studied extensively. ɸMR003 recognizes and binds to wall teichoic acid (WTA) of S. aureus during infection. In silico comparisons of the genomes of ɸMR003 and ɸSA012 revealed that ORF117 and ORF119 of ɸMR003 are homologous to the putative receptor-binding proteins ORF103 and ORF105 of ɸSA012, with amino acid similarities of 75% and 72%, respectively. ORF104, which is an N-acetylglucosaminidase found in the ɸMR003 tail, may facilitate phage's infection onto the WTA-null S. aureus RN4220. The differences in tail and baseplate proteins may be key contributing factors to the different host specificities of ɸMR003 and ɸSA012. ɸMR003 showed strong adsorptivity, but not infectivity, against S. aureus SA003, which may be influenced by the bacterium's restriction modification system. This study expands our knowledge of the genomic diversity and host specificity of Silviavirus, which is a potential phage therapy candidate for MRSA infections.
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Affiliation(s)
- Chanthol Peng
- School of Life Science and Technology, Tokyo Institute of Technology, 4259J2-15 Nagatsuta-cho, Midori-ku, Yokohama, 226-8501, Japan
- Faculty of Chemical and Food Engineering, Institute of Technology of Cambodia, Russian Federation Blvd., P.O. Box 86, Phnom Penh, 12156, Cambodia
| | - Tomoko Hanawa
- Department of Infectious Diseases, Kyorin University School of Medicine, 6-20-2 Shinkawa, Mitaka-shi, Tokyo, 181-8611, Japan
| | - Aa Haeruman Azam
- School of Life Science and Technology, Tokyo Institute of Technology, 4259J2-15 Nagatsuta-cho, Midori-ku, Yokohama, 226-8501, Japan
| | - Cierra LeBlanc
- Department of Microbiology, University of Washington, Seattle, WA, USA
| | - Porsry Ung
- Faculty of Chemical and Food Engineering, Institute of Technology of Cambodia, Russian Federation Blvd., P.O. Box 86, Phnom Penh, 12156, Cambodia
| | - Takeaki Matsuda
- Department of Traumatology and Critical Care Medicine, Kyorin University School of Medicine, 6-20-2 Shinkawa, Mitaka-shi, Tokyo, 181-8611, Japan
| | - Hiroaki Onishi
- Department of Laboratory Medicine, Kyorin University School of Medicine, 6-20-2 Shinkawa, Mitaka-shi, Tokyo, 181-8611, Japan
| | - Kazuhiko Miyanaga
- School of Life Science and Technology, Tokyo Institute of Technology, 4259J2-15 Nagatsuta-cho, Midori-ku, Yokohama, 226-8501, Japan
| | - Yasunori Tanji
- School of Life Science and Technology, Tokyo Institute of Technology, 4259J2-15 Nagatsuta-cho, Midori-ku, Yokohama, 226-8501, Japan.
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54
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Titouche Y, Hakem A, Houali K, Meheut T, Vingadassalon N, Ruiz-Ripa L, Salmi D, Chergui A, Chenouf N, Hennekinne J, Torres C, Auvray F. Emergence of methicillin-resistant Staphylococcus aureus (MRSA) ST8 in raw milk and traditional dairy products in the Tizi Ouzou area of Algeria. J Dairy Sci 2019; 102:6876-6884. [DOI: 10.3168/jds.2018-16208] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Accepted: 03/23/2019] [Indexed: 12/22/2022]
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55
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Yu H, Liu M, Liu Y, Qin L, Jin M, Wang Z. Antimicrobial Activity and Mechanism of Action of Dracocephalum moldavica L. Extracts Against Clinical Isolates of Staphylococcus aureus. Front Microbiol 2019; 10:1249. [PMID: 31244794 PMCID: PMC6563755 DOI: 10.3389/fmicb.2019.01249] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 05/20/2019] [Indexed: 11/13/2022] Open
Abstract
Background: Dracocephalum moldavica L. is a popular traditional medicine used by many countries, which has a wide range of pharmacological effects. The aim of this work was to investigate the antimicrobial effects of D. moldavica L. extracts against clinical isolates of Staphylococcus aureus. Our results demonstrated that the minimal inhibitory concentration (MIC) for 50 and 90% of S. aureus isolates (MIC50 and MIC90) of the ethyl acetate (EtOAc) fraction from D. moldavica L. ethanol extract were 780 and 1,065 μg/ml, respectively. We further observed that the EtOAc fraction disrupted 24-h biofilm caused cell membrane damage and irregular cell shape. Additionally, the EtOAc fraction showed slight to moderate toxic effects on human epidermal keratinocyte (HaCaT) cells. Moreover, the results of the differential proteome revealed that 231 proteins were upregulated, while 61 proteins were downregulated in S. aureus after treatment with the EtOAc fraction. The differentially expressed proteins were functionally categorized by the Gene Ontology (GO) enrichment and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway. These proteins contribute to membrane damage, inhibition of biofilm formation, and changes in energy metabolism. Thus, the EtOAc fraction of D. moldavica L. ethanol extract, as a natural product, has the potential to be used as an antimicrobial agent to control the clinical isolates of S. aureus.
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Affiliation(s)
- Hui Yu
- The Second Affiliated Hospital, Baotou Medical College, Baotou, China
| | - Min Liu
- School of Public Health, Baotou Medical College, Baotou, China
| | - Yun Liu
- School of Public Health, Baotou Medical College, Baotou, China
| | - Lei Qin
- The Second Affiliated Hospital, Baotou Medical College, Baotou, China
| | - Min Jin
- School of Public Health, Baotou Medical College, Baotou, China
| | - Zhanli Wang
- The Second Affiliated Hospital, Baotou Medical College, Baotou, China
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56
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Elal Mus T, Cetinkaya F, Karahan H, Gurbuz IB, Degirmenci G. Investigation of mecA gene, virulence traits and antibiotic resistance profiles in methicillin‐resistant Staphylococcus aureusisolates from dairy products. J Food Saf 2019. [DOI: 10.1111/jfs.12620] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Tulay Elal Mus
- Department of Food ProcessingUniversity of Uludag Keles Bursa Turkey
| | - Figen Cetinkaya
- Faculty of Veterinary Medicine, Food Hygiene, and TechnologyUniversity of Uludag Nilüfer Bursa Turkey
| | - Hasan Karahan
- Department of Crop and Animal ProductionUniversity of Uludag Keles Bursa Turkey
| | | | - Gokhan Degirmenci
- Faculty of Veterinary Medicine, Food Hygiene, and TechnologyUniversity of Uludag Nilüfer Bursa Turkey
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57
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Blando F, Russo R, Negro C, De Bellis L, Frassinetti S. Antimicrobial and Antibiofilm Activity against Staphylococcus aureus of Opuntia ficus-indica (L.) Mill. Cladode Polyphenolic Extracts. Antioxidants (Basel) 2019; 8:antiox8050117. [PMID: 31052535 PMCID: PMC6562908 DOI: 10.3390/antiox8050117] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Revised: 04/25/2019] [Accepted: 04/28/2019] [Indexed: 12/04/2022] Open
Abstract
Plant extracts are a rich source of natural compounds with antimicrobial properties, which are able to prevent, at some extent, the growth of foodborne pathogens. The aim of this study was to investigate the potential of polyphenolic extracts from cladodes of Opuntia ficus-indica (L.) Mill. to inhibit the growth of some enterobacteria and the biofilm formation by Staphylococcus aureus. Opuntia ficus-indica cladodes at two stages of development were analysed for total phenolic content and antioxidant activity by Oxygen Radical Absorbance Capacity (ORAC) and Trolox equivalent antioxidant capacity (TEAC) (in vitro assays) and by cellular antioxidant activity in red blood cells (CAA-RBC) (ex vivo assay). The Liquid Chromatography Time-of-Flight Mass Spectrometry (LC/MS–TOF) analysis of the polyphenolic extracts revealed high levels of piscidic acid, eucomic acid, isorhamnetin derivatives and rutin, particularly in the immature cladode extracts. Opuntia cladodes extracts showed a remarkable antioxidant activity (in vitro and ex vivo), a selective inhibition of the growth of Gram-positive bacteria, and an inhibition of Staphylococcus aureus biofilm formation. Our results suggest and confirm that Opuntia ficus-indica cladode extracts could be employed as functional food, due to the high polyphenolic content and antioxidant capacity, and used as natural additive for food process control and food safety.
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Affiliation(s)
- Federica Blando
- Institute of Sciences of Food Production (ISPA), National Research Council (CNR), Research Unit of Lecce, Via Prov. le Lecce-Monteroni, 73100 Lecce, Italy.
| | - Rossella Russo
- Institute of Biology and Agricultural Biotechnology (IBBA), National Research Council (CNR), Research Unit of Pisa, Via Moruzzi 1, 56124 Pisa, Italy.
| | - Carmine Negro
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), Salento University, 73100 Lecce, Italy.
| | - Luigi De Bellis
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), Salento University, 73100 Lecce, Italy.
| | - Stefania Frassinetti
- Institute of Biology and Agricultural Biotechnology (IBBA), National Research Council (CNR), Research Unit of Pisa, Via Moruzzi 1, 56124 Pisa, Italy.
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58
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Bisignano C, Ginestra G, Smeriglio A, La Camera E, Crisafi G, Franchina FA, Tranchida PQ, Alibrandi A, Trombetta D, Mondello L, Mandalari G. Study of the Lipid Profile of ATCC and Clinical Strains of Staphylococcus aureus in Relation to Their Antibiotic Resistance. Molecules 2019; 24:molecules24071276. [PMID: 30986911 PMCID: PMC6480324 DOI: 10.3390/molecules24071276] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 03/22/2019] [Accepted: 03/29/2019] [Indexed: 11/16/2022] Open
Abstract
A number of reports have indicated a relationship between bacterial resistance to antibiotics and their lipid composition. In the present study, we characterized the lipid profiles of American Type Culture Collection (ATCC) and clinical strains of Staphylococcus aureus and its correlation with antibiotic resistance and hydrophobicity. The following strains were used: S. aureus ATCC 6538P, S. aureus ATCC 43300 (MRSA), seven clinical strains from the pharynges, two strains from duodenal ulcers, four strains from hip prostheses, and one strain from the conjunctiva. Lipid-related differentiation was observed across the S. aureus strains: the higher abundance of anteiso-pentadecanoic acid (anteiso-C15:0) and anteiso-heptadecanoic acid (anteiso-C17:0), followed by iso-pentadecanoic acid (iso-C15:0), suggested that these were common lipids. Iso-tridecanoic acid (iso-C13:0) and anteiso-tridecanoic acid (anteiso-C13:0), iso-hexadecanoic acid (iso-C16:0) and anteiso-hexadecanoic acid (anteiso-C16:0), and all forms of octadecanoic acid (C18:0) were usually detected in low abundance. Strains isolated from pharynges showed the highest ratio of branched/straight chains. A distinction in two clusters based on the amount and type of bacterial lipids identified was obtained, which correlated to the antibiotic resistance, the strains origin, and the cell-surface hydrophobicity. We report a potential correlation between the lipid profile of S. aureus strains, site of infection, antibiotic resistance, and cell-surface hydrophobicity. These results, which still need further insights, could be a first step to identifying antibiotic resistance in response to environmental adaptation.
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Affiliation(s)
- Carlo Bisignano
- Department of Biomedical, Dental, Morphological and Functional Images Sciences, University of Messina, Via C. Valeria, 98125 Messina, Italy.
| | - Giovanna Ginestra
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, I-98168 Messina, Italy.
| | - Antonella Smeriglio
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, I-98168 Messina, Italy.
| | - Erminia La Camera
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, I-98168 Messina, Italy.
| | - Giuseppe Crisafi
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, I-98168 Messina, Italy.
| | - Flavio A Franchina
- Chromaleont c/o Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, I-98168 Messina, Italy.
- School of Engineering at Dartmouth College, 14 Engineering Drive, Hanover, NH 03755, USA.
- University of Liège, Molecular System Organic & Biological Analytical Chemistry, 11 Allée du Six Août, 4000 Liège, Belgium.
| | - Peter Q Tranchida
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, I-98168 Messina, Italy.
| | - Angela Alibrandi
- Department of Economics, Unit of Statistical and Mathematical Sciences, University of Messina, 98125 Messina, Italy.
| | - Domenico Trombetta
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, I-98168 Messina, Italy.
| | - Luigi Mondello
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, I-98168 Messina, Italy.
- Chromaleont c/o Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, I-98168 Messina, Italy.
| | - Giuseppina Mandalari
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, I-98168 Messina, Italy.
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59
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Wu YP, Liu XY, Bai JR, Xie HC, Ye SL, Zhong K, Huang YN, Gao H. Inhibitory effect of a natural phenolic compound, 3-p-trans-coumaroyl-2-hydroxyquinic acid against the attachment phase of biofilm formation of Staphylococcus aureus through targeting sortase A. RSC Adv 2019; 9:32453-32461. [PMID: 35529766 PMCID: PMC9073164 DOI: 10.1039/c9ra05883d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 09/17/2019] [Indexed: 12/12/2022] Open
Abstract
3-p-trans-Coumaroyl-2-hydroxyquinic acid (CHQA), a natural phenolic compound, prevented Staphylococcus aureus biofilm formation due to the inhibition of the initial attachment stage of biofilm development by targeting sortase A.
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Affiliation(s)
- Yan-Ping Wu
- Department of Food Science and Technology
- College of Biomass and Engineering and Healthy Food Evaluation Research Center
- Sichuan University
- Chengdu 610065
- China
| | - Xiao-Yan Liu
- Department of Food Science and Technology
- College of Biomass and Engineering and Healthy Food Evaluation Research Center
- Sichuan University
- Chengdu 610065
- China
| | - Jin-Rong Bai
- Department of Food Science and Technology
- College of Biomass and Engineering and Healthy Food Evaluation Research Center
- Sichuan University
- Chengdu 610065
- China
| | - Hong-Chen Xie
- Department of Public Health
- West China Medical School of Sichuan University
- Chengdu 610041
- People's Republic of China
| | - Si-Liang Ye
- College of Animal Science
- Jilin University
- Changchun 130062
- People's Republic of China
| | - Kai Zhong
- Department of Food Science and Technology
- College of Biomass and Engineering and Healthy Food Evaluation Research Center
- Sichuan University
- Chengdu 610065
- China
| | - Yi-Na Huang
- Department of Public Health
- West China Medical School of Sichuan University
- Chengdu 610041
- People's Republic of China
| | - Hong Gao
- Department of Food Science and Technology
- College of Biomass and Engineering and Healthy Food Evaluation Research Center
- Sichuan University
- Chengdu 610065
- China
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60
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Bai JR, Wu YP, Elena G, Zhong K, Gao H. Insight into the effect of quinic acid on biofilm formed byStaphylococcus aureus. RSC Adv 2019; 9:3938-3945. [PMID: 35518066 PMCID: PMC9060517 DOI: 10.1039/c8ra09136f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2018] [Accepted: 01/22/2019] [Indexed: 01/08/2023] Open
Abstract
The biofilm formation of Staphylococcus aureus on food contact surfaces is the main risk of food contamination. In the present study, we firstly investigated the inhibitory effect of quinic acid (QA) on biofilm formed by S. aureus. Crystal violet staining assay and microscopy analysis clearly showed that QA at sub-MIC concentrations was able to significantly reduce the biofilm biomass and cause a collapse on biofilm architecture. Meanwhile, fibrinogen binding assay showed that QA had obviously effect on the S. aureus bacteria adhesion. XTT reduction assay and confocal laser scanning microscopic images revealed that QA significantly decreased metabolic activity and viability of biofilm cells. In addition, qRT-PCR analysis explored the potential inhibitory mechanism of QA against biofilm formation, which indicated that QA significantly repressed the gene sarA and activated the gene agrA. Moreover, QA exhibited a highly ability to reduce the number of sessile S. aureus cells adhered on the stainless steel. So, it was suggested that QA could be used as a promising antibiofilm agent to control biofilm formation of S. aureus. QA effectively inhibited S. aureus biofilm formation. The key genes of biofilm inhibition induced by QA were agrA and sarA.![]()
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Affiliation(s)
- Jin-Rong Bai
- College of Light Industry
- Textile and Food Engineering and Healthy Food Evaluation Research Center
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Yan-Ping Wu
- College of Light Industry
- Textile and Food Engineering and Healthy Food Evaluation Research Center
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Grosu Elena
- College of Light Industry
- Textile and Food Engineering and Healthy Food Evaluation Research Center
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Kai Zhong
- College of Light Industry
- Textile and Food Engineering and Healthy Food Evaluation Research Center
- Sichuan University
- Chengdu 610065
- P. R. China
| | - Hong Gao
- College of Light Industry
- Textile and Food Engineering and Healthy Food Evaluation Research Center
- Sichuan University
- Chengdu 610065
- P. R. China
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61
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Rodríguez-Lázaro D, Alonso-Calleja C, Oniciuc EA, Capita R, Gallego D, González-Machado C, Wagner M, Barbu V, Eiros-Bouza JM, Nicolau AI, Hernández M. Characterization of Biofilms Formed by Foodborne Methicillin-Resistant Staphylococcus aureus. Front Microbiol 2018; 9:3004. [PMID: 30564226 PMCID: PMC6288681 DOI: 10.3389/fmicb.2018.03004] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Accepted: 11/20/2018] [Indexed: 12/21/2022] Open
Abstract
The objective of this study was to evaluate the capacity of 49 methicillin resistant Staphylococcus aureus (MRSA) from foods of animal origin (42 from dairy products and 7 from meat and meat products) to form biofilms. Overall, a higher biofilm biomass was observed for those MRSA strains harboring SCCmec type IV, while 8 MRSA strains (5 from dairy products and 3 from meat and meat products) were classified as strong biofilm formers in standard Tryptic Soy Broth medium. When a prolonged incubation period (48 h) was applied for those 8 MRSA strains, an increased biofilm biomass accumulation was observed during the time course, whereas the number of viable cells within the biofilms decreased as the biomass increased. The capacity of biofilm production correlated pretty well between the experiments using polystyrene microtiter plates and stainless steel micro-well plates, and significant higher values were observed in stainless steel when glucose was added to TSB during the enrichment. Biofilms were further characterized by confocal laser scanning microscope (CLSM), confirming that proteins and α-polysaccharides were the predominant components inside the extracellular polymeric matrix of biofilms formed by MRSA strains. In conclusion, our results confirm that MRSA isolates from foods of animal origin have significant capacity for forming biofilms with a high protein content, which can play a key role for the successful dissemination of MRSA lineages via food. Knowledge of the capacity of MRSA strains to produce biofilms, as well as characterization of the main MRSA biofilms matrix components, can help both to counteract the mechanisms involved in biofilm formation and resistance and to define more rational control strategies by using tailor-made cleaning agents.
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Affiliation(s)
- David Rodríguez-Lázaro
- Microbiology Division, Department of Food Science and Biotechnology, Faculty of Science, University of Burgos, Burgos, Spain
| | - Carlos Alonso-Calleja
- Department of Food Hygiene and Technology, Veterinary Faculty, University of León, León, Spain.,Institute of Food Science and Technology, University of León, León, Spain
| | - Elena Alexandra Oniciuc
- Faculty of Food Science and Engineering, Dunarea de Jos University of Galati, Galati, Romania
| | - Rosa Capita
- Department of Food Hygiene and Technology, Veterinary Faculty, University of León, León, Spain.,Institute of Food Science and Technology, University of León, León, Spain
| | - David Gallego
- Dependencia de Sanidad de Vizcaya, Delegación del Gobierno en el País Vasco, Bilbao, Spain
| | - Camino González-Machado
- Department of Food Hygiene and Technology, Veterinary Faculty, University of León, León, Spain.,Institute of Food Science and Technology, University of León, León, Spain
| | - Martin Wagner
- Institute for Milk Hygiene, Milk Technology and Food Science, University of Veterinary Medicine Vienna, Vienna, Austria
| | - Vasilica Barbu
- Faculty of Food Science and Engineering, Dunarea de Jos University of Galati, Galati, Romania
| | | | - Anca I Nicolau
- Faculty of Food Science and Engineering, Dunarea de Jos University of Galati, Galati, Romania
| | - Marta Hernández
- Microbiology Division, Department of Food Science and Biotechnology, Faculty of Science, University of Burgos, Burgos, Spain.,Laboratory of Molecular Biology and Microbiology, Instituto Tecnológico Agrario de Castilla y León, Valladolid, Spain
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62
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Yang X, Liu J, Huang Y, Meng J, Lei G, Jia Y, Huang W, Wang Y, Zhang L, Lv H, He S. Prevalence, Molecular Characterization, and Antimicrobial Susceptibility of Methicillin-Resistant Staphylococcus aureus from Different Origins in Sichuan Province, China, 2007-2015. Foodborne Pathog Dis 2018; 15:705-710. [PMID: 30089220 DOI: 10.1089/fpd.2018.2442] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is a major multidrug-resistant (MDR) opportunistic pathogen that is responsible for nosocomial infections worldwide. The emergence of MRSA in food-producing animals has heightened concerns regarding the presence of MRSA in foods having an animal origin. The objectives of this study were to determine the prevalence of MRSA in different sources, including retail food, food-producing animals, and food handlers in Sichuan province. During 2007-2015, S. aureus was isolated from samples having different origins. Susceptibilities of MRSA to a panel of 12 antimicrobial agents were determined according to Clinical and Laboratory Standards Institute (CSLI) procedures. Pulsed-field gel electrophoresis, spa typing, staphylococcal chromosomal cassette (SCC) mec typing, and multilocus sequence typing (MLST) were used to characterize the relationship between these isolates. A total of 756 S. aureus were isolated from 11,067 samples. Of these, 52 isolates were classified as MRSA based on the presence of mecA genes. An antimicrobial susceptibility assay indicated that CHL-CLI-ERY-FOX-OXA-PEN-TET (n = 10) and CHL-CIP-CLI-ERY-FOX-OXA-PEN-TET (n = 8) were the two predominant MDR profiles in the isolates. Using 60% genetic similarity as a cutoff, the 52 MRSA isolates were grouped into 6 clusters having 34 pulsotypes. MLST typing showed seven multilocus sequence types (STs) with ST59 and ST9 being the most common. Six SCCmec types were identified in all MRSA isolates. The MRSA isolates had relatively low prevalence in Sichuan province. Clonal expansion is not involved in the dissemination of MRSA from food origins. Considering the threat of MRSA to public health, further surveillance is required to monitor the prevalence of food-related MRSA.
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Affiliation(s)
- Xiaorong Yang
- 1 Center for Disease Control and Prevention of Sichuan Province , Chengdu, China
| | - Jun Liu
- 2 Center for Disease Control and Prevention of Deyang City , Deyang, China
| | - Yulan Huang
- 1 Center for Disease Control and Prevention of Sichuan Province , Chengdu, China
| | - Jiantong Meng
- 3 Center for Disease Control and Prevention of Chengdu City , Chengdu, China
| | - Gaopeng Lei
- 1 Center for Disease Control and Prevention of Sichuan Province , Chengdu, China
| | - Yong Jia
- 4 Center for Disease Control and Prevention of Ziyang City , Ziyang, China
| | - Weifeng Huang
- 1 Center for Disease Control and Prevention of Sichuan Province , Chengdu, China
| | - Yong Wang
- 5 Center for Disease Control and Prevention of Suining City , Suining, China
| | - Lin Zhang
- 1 Center for Disease Control and Prevention of Sichuan Province , Chengdu, China
| | - Hong Lv
- 1 Center for Disease Control and Prevention of Sichuan Province , Chengdu, China
| | - Shusen He
- 1 Center for Disease Control and Prevention of Sichuan Province , Chengdu, China
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Preliminary study on the effect of brazilin on biofilms of Staphylococcus aureus. Exp Ther Med 2018; 16:2108-2118. [PMID: 30186447 PMCID: PMC6122259 DOI: 10.3892/etm.2018.6403] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 06/01/2018] [Indexed: 12/13/2022] Open
Abstract
Biofilms significantly enhance antibiotic resistance by inhibiting penetration of antibiotics and are shielded from the immune system via the formation of an extracellular polymeric matrix. Innovative and novel approaches are required for the inhibition of biofilm formation and treatment of biofilm-associated infectious diseases. In the current study, a biofilm model of Staphylococcus aureus was established in vitro to explore inhibitory effects of brazilin (BN) on biofilm formation and to evaluate damaging effects of BN in the presence and absence of vancomycin (VCM) on the biofilm. Antibiofilm-infection mechanisms of BN were observed. In these experiments, the clinical strain of S. aureus C-4-4 was isolated for biofilm formation. Crystal violet staining and fluorescence microscopy revealed that BN inhibited biofilm formation in vitro and the best effect was observed with two times the minimum inhibitory concentration of BN following 48 h incubation. Additionally, the results demonstrated that BN in combination with VCM enhanced the damage to biofilms, whereas VCM alone did not. The results of the reverse transcription-quantitative polymerase chain reaction analyses demonstrated that BN downregulated gene expression of intercellular adhesion (ica)A and upregulated icaR and the quorum-sensing (QS) system regulator accessory gene regulator A. In summary, BN inhibited S. aureus biofilm formation and destroyed biofilms, while simultaneously increasing permeability to VCM. BN was able to reduce production of the extracellular polymeric matrix and inhibited the QS system. These results support the use of BN as a novel drug and treatment strategy for S. aureus biofilm-associated infections.
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Unlu A, Sar T, Seker G, Erman AG, Kalpar E, Akbas MY. Biofilm formation byStaphylococcus aureusstrains and their control by selected phytochemicals. INT J DAIRY TECHNOL 2018. [DOI: 10.1111/1471-0307.12520] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Aise Unlu
- Department of Chemistry; Gebze Technical University; Gebze-Kocaeli 41400 Turkey
| | - Taner Sar
- Department of Molecular Biology and Genetics; Gebze Technical University; Gebze-Kocaeli 41400 Turkey
| | - Gamze Seker
- Department of Molecular Biology and Genetics; Gebze Technical University; Gebze-Kocaeli 41400 Turkey
| | - Ayse Gokce Erman
- Department of Molecular Biology and Genetics; Gebze Technical University; Gebze-Kocaeli 41400 Turkey
| | - Elif Kalpar
- Department of Molecular Biology and Genetics; Gebze Technical University; Gebze-Kocaeli 41400 Turkey
| | - Meltem Yesilcimen Akbas
- Department of Molecular Biology and Genetics; Gebze Technical University; Gebze-Kocaeli 41400 Turkey
- Institute of Biotechnology; Gebze Technical University; Gebze-Kocaeli 41400 Turkey
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65
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Rauf MA, Zubair S, Ateeq H, Dabeer K, Pachauri S, Ajmal M, Owais M. Synergistic Effect of Diallyl Sulfide With Zinc Oxide Nanorods: A Novel and Effective Approach for Treatment of Acute Dermatitis in Model Animals. Front Microbiol 2018; 9:586. [PMID: 29720966 PMCID: PMC5915547 DOI: 10.3389/fmicb.2018.00586] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 03/14/2018] [Indexed: 11/20/2022] Open
Abstract
Besides inciting persistent and recurrent nosocomial afflictions, Staphylococcus aureus (S. aureus), a biofilm forming pathogen, poses an increased risk of several skin as well as respiratory tract infections as well. Emerging antimicrobial resistance trend asks to search for an alternate non-antibiotic based option to combat S. aureus pathogen. In the present study, we evaluated synergistic antimicrobial potential of Zinc oxide nanorods (ZnO-NRs) and diallyl sulphide (DAS) emulsion against methicillin resistant Staphylococcus aureus (MRSA). The antimicrobial assessment study suggests that the ZnO-NR and DAS emulsion effectively suppressed both sensitive S. aureus as well as MRSA isolates. The combination treatment showed enhanced activity even at a lower concentration as compared to the single treatment based on ZnO-NRs and DAS emulsion alone. The ZnO-NRs-DAS combination showed significant inhibition of MRSA biofilm as well. The data suggest that a combination therapy, comprising of ZnO-NRs and DAS emulsion, successfully treated experimental dermatitis infection caused by MRSA in mice model.
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Affiliation(s)
- Mohd A Rauf
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, India
| | - Swaleha Zubair
- Department of Computer Science, Aligarh Muslim University, Aligarh, India
| | - Hira Ateeq
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, India
| | - Khadija Dabeer
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, India
| | - Subodh Pachauri
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, India.,Department of Biotechnology, NMAM Institute of Technology, Nitte, India
| | - Mohd Ajmal
- Department of Anatomy, Jawaharlal Nehru Medical College, Aligarh Muslim University, Aligarh, India
| | - Mohammad Owais
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, India
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Formation of Staphylococcus aureus Biofilm in the Presence of Sublethal Concentrations of Disinfectants Studied via a Transcriptomic Analysis Using Transcriptome Sequencing (RNA-seq). Appl Environ Microbiol 2017; 83:AEM.01643-17. [PMID: 29030437 DOI: 10.1128/aem.01643-17] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Accepted: 10/02/2017] [Indexed: 01/25/2023] Open
Abstract
Staphylococcus aureus is a common biofilm-forming pathogen. Low doses of disinfectants have previously been reported to promote biofilm formation and to increase virulence. The aim of this study was to use transcriptome sequencing (RNA-seq) analysis to investigate global transcriptional changes in S. aureus in response to sublethal concentrations of the commonly used food industry disinfectants ethanol (EtOH) and chloramine T (ChT) and their combination (EtOH_ChT) in order to better understand the effects of these agents on biofilm formation. Treatment with EtOH and EtOH_ChT resulted in more significantly altered expression profiles than treatment with ChT. Our results revealed that EtOH and EtOH_ChT treatments enhanced the expression of genes responsible for regulation of gene expression (sigB), cell surface factors (clfAB), adhesins (sdrDE), and capsular polysaccharides (cap8EFGL), resulting in more intact biofilm. In addition, in this study we were able to identify the pathways involved in the adaptation of S. aureus to the stress of ChT treatment. Further, EtOH suppressed the effect of ChT on gene expression when these agents were used together at sublethal concentrations. These data show that in the presence of sublethal concentrations of tested disinfectants, S. aureus cells trigger protective mechanisms and try to cope with them.IMPORTANCE So far, the effect of disinfectants is not satisfactorily explained. The presented data will allow a better understanding of the mode of disinfectant action with regard to biofilm formation and the ability of bacteria to survive the treatment. Such an understanding could contribute to the effort to eliminate possible sources of bacteria, making disinfectant application as efficient as possible. Biofilm formation plays significant role in the spread and pathogenesis of bacterial species.
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Biofilm is a Major Virulence Determinant in Bacterial Colonization of Chronic Skin Ulcers Independently from the Multidrug Resistant Phenotype. Int J Mol Sci 2017; 18:ijms18051077. [PMID: 28513576 PMCID: PMC5454986 DOI: 10.3390/ijms18051077] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2017] [Revised: 05/06/2017] [Accepted: 05/11/2017] [Indexed: 01/28/2023] Open
Abstract
Bacterial biofilm is a major factor in delayed wound healing and high levels of biofilm production have been repeatedly described in multidrug resistant organisms (MDROs). Nevertheless, a quantitative correlation between biofilm production and the profile of antimicrobial drug resistance in delayed wound healing remains to be determined. Microbial identification, antibiotic susceptibility and biofilm production were assessed in 135 clinical isolates from 87 patients. Gram-negative bacteria were the most represented microorganisms (60.8%) with MDROs accounting for 31.8% of the total isolates. Assessment of biofilm production revealed that 80% of the strains were able to form biofilm. A comparable level of biofilm production was found with both MDRO and not-MDRO with no significant differences between groups. All the methicillin-resistant Staphylococcus aureus (MRSA) and 80% of Pseudomonas aeruginosa MDR strains were found as moderate/high biofilm producers. Conversely, less than 17% of Klebsiella pneumoniae extended-spectrum beta-lactamase (ESBL), Escherichia coli-ESBL and Acinetobacter baumannii were moderate/high biofilm producers. Notably, those strains classified as non-biofilm producers, were always associated with biofilm producer bacteria in polymicrobial colonization. This study shows that biofilm producers were present in all chronic skin ulcers, suggesting that biofilm represents a key virulence determinant in promoting bacterial persistence and chronicity of ulcerative lesions independently from the MDRO phenotype.
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68
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Doulgeraki AI, Efthimiou G, Paramithiotis S, Pappas KM, Typas MA, Nychas GJ. Effect of Rocket ( Eruca sativa) Extract on MRSA Growth and Proteome: Metabolic Adjustments in Plant-Based Media. Front Microbiol 2017; 8:782. [PMID: 28529502 PMCID: PMC5418331 DOI: 10.3389/fmicb.2017.00782] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 04/18/2017] [Indexed: 12/22/2022] Open
Abstract
The emergence of methicillin-resistant Staphylococcus aureus (MRSA) in food has provoked a great concern about the presence of MRSA in associated foodstuff. Although MRSA is often detected in various retailed meat products, it seems that food handlers are more strongly associated with this type of food contamination. Thus, it can be easily postulated that any food could be contaminated with this pathogen in an industrial environment or in household and cause food poisoning. To this direction, the effect of rocket (Eruca sativa) extract on MRSA growth and proteome was examined in the present study. This goal was achieved with the comparative study of the MRSA strain COL proteome, cultivated in rocket extract versus the standard Luria-Bertani growth medium. The obtained results showed that MRSA was able to grow in rocket extract. In addition, proteome analysis using 2-DE method showed that MRSA strain COL is taking advantage of the sugar-, lipid-, and vitamin-rich substrate in the liquid rocket extract, although its growth was delayed in rocket extract compared to Luria–Bertani medium. This work could initiate further research about bacterial metabolism in plant-based media and defense mechanisms against plant-derived antibacterials.
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Affiliation(s)
- Agapi I Doulgeraki
- Laboratory of Microbiology and Biotechnology of Foods, Department of Food Science and Human Nutrition, Agricultural University of AthensAthens, Greece
| | - Georgios Efthimiou
- Department of Genetics and Biotechnology, Faculty of Biology, School of Science, National and Kapodistrian University of AthensAthens, Greece
| | - Spiros Paramithiotis
- Laboratory of Food Quality Control and Hygiene, Department of Food Science and Human Nutrition, Agricultural University of AthensAthens, Greece
| | - Katherine M Pappas
- Department of Genetics and Biotechnology, Faculty of Biology, School of Science, National and Kapodistrian University of AthensAthens, Greece
| | - Milton A Typas
- Department of Genetics and Biotechnology, Faculty of Biology, School of Science, National and Kapodistrian University of AthensAthens, Greece
| | - George-John Nychas
- Laboratory of Microbiology and Biotechnology of Foods, Department of Food Science and Human Nutrition, Agricultural University of AthensAthens, Greece
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