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Sanchez M, Barrere V, Treilleux I, Chopin N, Melodelima D. Development of a noninvasive HIFU treatment for breast adenocarcinomas using a toroidal transducer based on preliminary attenuation measurements. Ultrasonics 2021; 115:106459. [PMID: 33990009 DOI: 10.1016/j.ultras.2021.106459] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 01/21/2021] [Accepted: 05/04/2021] [Indexed: 06/12/2023]
Abstract
Breast cancer is the most commonly diagnosed type of cancer among women. For the last fifteen years, treatments that are less invasive than lumpectomy, such as high-intensity focused ultrasound (HIFU) therapy, have been developed, with encouraging results. In this study, a toroidal HIFU transducer was used to create lesions of at least 2 cm in diameter within less than one minute of treatment. The toroidal HIFU transducer created two focal zones that led to large, fast and homogeneous ablations (10.5 cc/min). The experiments were conducted in 30 human samples of normal breast tissues recovered from mastectomies to measure acoustic attenuation (N = 30), and then, HIFU lesions were created (N = 15). Eight HIFU ablations were performed to evaluate the reproducibility of the lesions. HIFU lesions were created in 45 s with a toroidal HIFU transducer working at 2.5 MHz. The longest and shortest axes of the HIFU lesions were 21.7 ± 3.1 mm and 23.5 ± 3.3 mm respectively, corresponding to an average volume of 7.3 ± 1.4 cm3. These HIFU lesions were performed at an average depth of 19.0 ± 1.5 mm, while the integrity of the skin was preserved. The HIFU-treated breast tissues had a higher level of attenuation (0.57 ± 0.11 Np.cm-1.MHz-1) when compared to the untreated tissues (0.21 ± 0.04 Np.cm-1.MHz-1). This study shows the feasibility of a fast and fully noninvasive treatment using a toroidal transducer for breast tumors measuring up to 15 mm in diameter.
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Affiliation(s)
- M Sanchez
- LabTAU, INSERM, Centre Léon Bérard, Université Lyon 1, Univ Lyon, F-69003 Lyon, France
| | - V Barrere
- LabTAU, INSERM, Centre Léon Bérard, Université Lyon 1, Univ Lyon, F-69003 Lyon, France
| | | | - N Chopin
- Centre Léon Bérard, F-69008 Lyon, France
| | - D Melodelima
- LabTAU, INSERM, Centre Léon Bérard, Université Lyon 1, Univ Lyon, F-69003 Lyon, France.
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2
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Godefroy SB, Barrere V, Théolier J, Baker RC, Zhang G, Hamilton M, Pellegrino M, Byrne P, Ben Embarek P. Summary of the AOAC-Sponsored Workshop Series Related to the Global Understanding of Food Fraud (GUFF): Mobilization of Resources for Food Authenticity Assurance and Food Fraud Prevention and Mitigation. J AOAC Int 2021; 103:470-479. [PMID: 33241276 DOI: 10.1093/jaoacint/qsz035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 11/14/2019] [Accepted: 12/04/2019] [Indexed: 11/13/2022]
Abstract
BACKGROUND Reports of incidents associated with the misrepresentation of food products as well as the adulteration of their composition leading, at times, to significant public health impacts are being recorded. OBJECTIVE This paper aims at summarizing the outputs of three workshops dedicated to the theme "Global Understanding of Food Fraud" (GUFF), held in Quebec City in Canada (April 2017), Beijing in the People's Republic of China (October 2017) and Dubai in the United Arab Emirates (October 2018). METHOD Based on the contributions made at these workshops, the paper reviews current knowledge related to food fraud shared by experts and stakeholders representing the food industry sector, food regulators both domestically and internationally and scientists from Academia. It also discusses approaches available to the industry across the food supply chain to predict, prevent, and possibly mitigate food fraud, inclusive of targeted and non-targeted methods of analysis. RESULTS AND CONCLUSIONS The paper offers a discussion on areas warranting the mobilization of efforts and resources of the food stakeholder community to reach consistent and accessible guidance on food fraud prevention, validated analytical methods along with an increased emphasis on prevention in food regulatory measures targeting food fraud. Further development is needed to reach consistent and accessible guidance on food fraud prevention, validated analytical methods, along with an emphasis on food fraud prevention. HIGHLIGHTS Food fraud is receiving increased attention from consumers, regulators, and industry. International food fraud experts were invited to three workshops. Contributions and conclusions from the workshops are reported and discussed.
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Affiliation(s)
- Samuel Benrejeb Godefroy
- Food Risk Analysis and Regulatory Excellence Platform (PARERA), Department of Food Science and Institute of Nutrition and functional Foods (INAF), Université Laval, Québec, Canada
| | - Virginie Barrere
- Food Risk Analysis and Regulatory Excellence Platform (PARERA), Department of Food Science and Institute of Nutrition and functional Foods (INAF), Université Laval, Québec, Canada
| | - Jérémie Théolier
- Food Risk Analysis and Regulatory Excellence Platform (PARERA), Department of Food Science and Institute of Nutrition and functional Foods (INAF), Université Laval, Québec, Canada
| | - Robert C Baker
- Mars Global Food Safety Centre, Beijing, People's Republic of China
| | - Guangtao Zhang
- Mars Global Food Safety Centre, Beijing, People's Republic of China
| | | | | | - Pamela Byrne
- Food Safety Authority of Ireland, Dublin, Ireland
| | - Peter Ben Embarek
- International Food Safety Regulators Network (INFOSAN), Geneva, Switzerland
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Manny E, La Vieille S, Barrere V, Théolier J, Godefroy SB. Peanut and hazelnut occurrence as allergens in foodstuffs with precautionary allergen labeling in Canada. NPJ Sci Food 2021; 5:11. [PMID: 33976231 PMCID: PMC8113233 DOI: 10.1038/s41538-021-00093-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 03/23/2021] [Indexed: 11/29/2022] Open
Abstract
Precautionary allergen labeling (PAL) is widely used by food industries. Occurrence studies revealed that few analyzed products contained the allergen(s) present in the statement, but little is known in Canada. To improve manufacturing practices and better manage allergen cross-contamination, occurrence data is needed to determine the exposure of allergic individuals eating those products. Samples were analyzed for peanuts (n = 871) and hazelnuts (n = 863) using ELISA methods. Within samples analyzed for peanuts, 72% had a PAL (n = 628), 1% had peanuts as a minor ingredient (n = 9) and 27% were claimed “peanut-free” (n = 234). Most hazelnut samples had a PAL for tree nuts/hazelnuts (94%; n = 807) with 6% claimed “nut-free” (n = 56). Peanuts and hazelnuts were found in 4% (0.6–28.1 ppm) and 9% (0.4–2167 ppm) of all samples, respectively. Chocolates were mostly impacted; they should be treated apart from other foods and used in risk assessments scenarios to improve manufacturing practices, reducing unnecessary PAL use.
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Affiliation(s)
- Emilie Manny
- Food Risk Analysis and Regulatory Excellence Platform (PARERA), Institute of Nutrition and Functional Foods and Department of Food Science, Université Laval, Québec, Canada.
| | - Sébastien La Vieille
- Food Risk Analysis and Regulatory Excellence Platform (PARERA), Institute of Nutrition and Functional Foods and Department of Food Science, Université Laval, Québec, Canada.,Food Directorate, Health Canada, 251 Sir Frederick Banting Driveway, Ottawa, ON, Canada
| | - Virginie Barrere
- Food Risk Analysis and Regulatory Excellence Platform (PARERA), Institute of Nutrition and Functional Foods and Department of Food Science, Université Laval, Québec, Canada
| | - Jérémie Théolier
- Food Risk Analysis and Regulatory Excellence Platform (PARERA), Institute of Nutrition and Functional Foods and Department of Food Science, Université Laval, Québec, Canada
| | - Samuel Benrejeb Godefroy
- Food Risk Analysis and Regulatory Excellence Platform (PARERA), Institute of Nutrition and Functional Foods and Department of Food Science, Université Laval, Québec, Canada
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Touma J, La Vieille S, Guillier L, Barrere V, Manny E, Théolier J, Dominguez S, Godefroy SB. Occurrence and risk assessment of sesame as an allergen in selected Middle Eastern foods available in Montreal, Canada. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2021; 38:550-562. [DOI: 10.1080/19440049.2021.1881622] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Joseph Touma
- Food Risk Analysis and Regulatory Excellence Platform (PARERA), Department of Food Science and Institute of Nutrition and Functional Foods (INAF), Laval University, Quebec, Canada
- Department of Heavy Metals and Colorants, Lebanese Agricultural Research Institute, Beirut, Lebanon
| | - Sébastien La Vieille
- Food Risk Analysis and Regulatory Excellence Platform (PARERA), Department of Food Science and Institute of Nutrition and Functional Foods (INAF), Laval University, Quebec, Canada
- Food Directorate, Health Canada, Ottawa, Ontario, Canada
| | - Laurent Guillier
- Risk Assessment Department, French Agency for Food, Environmental and Occupational Health & Safety (ANSES), Maisons-Alfort, France
| | - Virginie Barrere
- Food Risk Analysis and Regulatory Excellence Platform (PARERA), Department of Food Science and Institute of Nutrition and Functional Foods (INAF), Laval University, Quebec, Canada
| | - Emilie Manny
- Food Risk Analysis and Regulatory Excellence Platform (PARERA), Department of Food Science and Institute of Nutrition and Functional Foods (INAF), Laval University, Quebec, Canada
| | - Jérémie Théolier
- Food Risk Analysis and Regulatory Excellence Platform (PARERA), Department of Food Science and Institute of Nutrition and Functional Foods (INAF), Laval University, Quebec, Canada
| | - Silvia Dominguez
- Food Risk Analysis and Regulatory Excellence Platform (PARERA), Department of Food Science and Institute of Nutrition and Functional Foods (INAF), Laval University, Quebec, Canada
| | - Samuel Benrejeb Godefroy
- Food Risk Analysis and Regulatory Excellence Platform (PARERA), Department of Food Science and Institute of Nutrition and Functional Foods (INAF), Laval University, Quebec, Canada
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Théolier J, Barrere V, Charlebois S, Benrejeb Godefroy S. Risk analysis approach applied to consumers’ behaviour toward fraud in food products. Trends Food Sci Technol 2021. [DOI: 10.1016/j.tifs.2020.11.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Manny E, La Vieille S, Barrere V, Theolier J, Godefroy SB. Occurrence of milk and egg allergens in foodstuffs in Canada. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2020; 38:15-32. [PMID: 33201786 DOI: 10.1080/19440049.2020.1834153] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Food allergies are life-threatening conditions that allergic individuals can avoid by consulting the food labels before consuming. Precautionary allergen labelling (or PAL), to warn against possible allergen cross-contamination, is widely used by food industries, reducing the food choices for allergic individuals. In Canada, there is limited information on the actual occurrence of allergens in products with a PAL related to the given allergen. This study attempted to fill the data gap by evaluating the occurrence of milk and egg allergens in Canadian products with PAL. A total of 1125 samples were analysed for milk and 840 for eggs, with 23% and 7% of these samples showing positive detection of ≥2.5 mg kg-1 for milk and ≥0.245 mg kg-1 for eggs. Chocolate products gave the largest number of positive results. Although the proportion of positive results was low, the levels detected reached 6471 mg kg-1 in a chocolate sample and were indicative of possible health consequences, if PAL was ignored by allergic consumers. The occurrence data generated is destinated to be used in exposure and risk assessments, to support allergen management linked to cross-contamination, with the possible development of allergen action levels that would be used by food industries, thus improving a risk-based approach for the application of PAL.
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Affiliation(s)
- Emilie Manny
- Food Risk Analysis and Regulatory Excellence Platform (PARERA), Institute of Nutrition and Functional Foods, and Food Science Department, Faculty of Food and Agricultural Sciences, Université Laval , Quebec, Quebec, Canada
| | - Sébastien La Vieille
- Food Risk Analysis and Regulatory Excellence Platform (PARERA), Institute of Nutrition and Functional Foods, and Food Science Department, Faculty of Food and Agricultural Sciences, Université Laval , Quebec, Quebec, Canada.,Food Directorate, Health Canada , Ottawa, Ontario, Canada
| | - Virginie Barrere
- Food Risk Analysis and Regulatory Excellence Platform (PARERA), Institute of Nutrition and Functional Foods, and Food Science Department, Faculty of Food and Agricultural Sciences, Université Laval , Quebec, Quebec, Canada
| | - Jérémie Theolier
- Food Risk Analysis and Regulatory Excellence Platform (PARERA), Institute of Nutrition and Functional Foods, and Food Science Department, Faculty of Food and Agricultural Sciences, Université Laval , Quebec, Quebec, Canada
| | - Samuel Benrejeb Godefroy
- Food Risk Analysis and Regulatory Excellence Platform (PARERA), Institute of Nutrition and Functional Foods, and Food Science Department, Faculty of Food and Agricultural Sciences, Université Laval , Quebec, Quebec, Canada
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Guntzburger Y, Théolier J, Barrere V, Peignier I, Godefroy S, de Marcellis-Warin N. Food industry perceptions and actions towards food fraud: Insights from a pan-Canadian study. Food Control 2020. [DOI: 10.1016/j.foodcont.2020.107182] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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8
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Barrere V, Everstine K, Théolier J, Godefroy S. Food fraud vulnerability assessment: Towards a global consensus on procedures to manage and mitigate food fraud. Trends Food Sci Technol 2020. [DOI: 10.1016/j.tifs.2020.04.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Barrere V, Théolier J, Lacroix S, Zbylut S, Valdez A, Collopy N, Lahey B, Godefroy S. Stability of milk and gliadin on swabs during 7 days under different storage conditions. Food Control 2020. [DOI: 10.1016/j.foodcont.2019.107054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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10
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Barrere V, Tompkins E, Armstrong M, Bird P, Bastin B, Goodridge L. Optimization of Salmonella detection in garlic, onion, cinnamon, red chili pepper powders and green tea. Int J Food Microbiol 2020; 316:108440. [DOI: 10.1016/j.ijfoodmicro.2019.108440] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 11/04/2019] [Accepted: 11/05/2019] [Indexed: 10/25/2022]
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11
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Caloone J, Barrere V, Sanchez M, Cambronero S, Huissoud C, Melodelima D. High-Intensity Focused Ultrasound Using a Toroidal Transducer as an Adjuvant Treatment for Placenta Accreta: A Preliminary Ex Vivo Study. Ing Rech Biomed 2019. [DOI: 10.1016/j.irbm.2019.05.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Emond-Rheault JG, Jeukens J, Freschi L, Kukavica-Ibrulj I, Boyle B, Dupont MJ, Colavecchio A, Barrere V, Cadieux B, Arya G, Bekal S, Berry C, Burnett E, Cavestri C, Chapin TK, Crouse A, Daigle F, Danyluk MD, Delaquis P, Dewar K, Doualla-Bell F, Fliss I, Fong K, Fournier E, Franz E, Garduno R, Gill A, Gruenheid S, Harris L, Huang CB, Huang H, Johnson R, Joly Y, Kerhoas M, Kong N, Lapointe G, Larivière L, Loignon S, Malo D, Moineau S, Mottawea W, Mukhopadhyay K, Nadon C, Nash J, Ngueng Feze I, Ogunremi D, Perets A, Pilar AV, Reimer AR, Robertson J, Rohde J, Sanderson KE, Song L, Stephan R, Tamber S, Thomassin P, Tremblay D, Usongo V, Vincent C, Wang S, Weadge JT, Wiedmann M, Wijnands L, Wilson ED, Wittum T, Yoshida C, Youfsi K, Zhu L, Weimer BC, Goodridge L, Levesque RC. A Syst-OMICS Approach to Ensuring Food Safety and Reducing the Economic Burden of Salmonellosis. Front Microbiol 2017. [PMID: 28626454 PMCID: PMC5454079 DOI: 10.3389/fmicb.2017.00996] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The Salmonella Syst-OMICS consortium is sequencing 4,500 Salmonella genomes and building an analysis pipeline for the study of Salmonella genome evolution, antibiotic resistance and virulence genes. Metadata, including phenotypic as well as genomic data, for isolates of the collection are provided through the Salmonella Foodborne Syst-OMICS database (SalFoS), at https://salfos.ibis.ulaval.ca/. Here, we present our strategy and the analysis of the first 3,377 genomes. Our data will be used to draw potential links between strains found in fresh produce, humans, animals and the environment. The ultimate goals are to understand how Salmonella evolves over time, improve the accuracy of diagnostic methods, develop control methods in the field, and identify prognostic markers for evidence-based decisions in epidemiology and surveillance.
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Affiliation(s)
| | - Julie Jeukens
- Institute for Integrative and Systems Biology, Université Laval, Québec CityQC, Canada
| | - Luca Freschi
- Institute for Integrative and Systems Biology, Université Laval, Québec CityQC, Canada
| | - Irena Kukavica-Ibrulj
- Institute for Integrative and Systems Biology, Université Laval, Québec CityQC, Canada
| | - Brian Boyle
- Institute for Integrative and Systems Biology, Université Laval, Québec CityQC, Canada
| | - Marie-Josée Dupont
- Institute for Integrative and Systems Biology, Université Laval, Québec CityQC, Canada
| | | | | | | | - Gitanjali Arya
- National Microbiology Laboratory, Public Health Agency of Canada, OttawaON, Canada
| | - Sadjia Bekal
- Laboratoire de Santé Publique du Québec, Sainte-Anne-de-BellevueQC, Canada
| | - Chrystal Berry
- National Microbiology Laboratory, Public Health Agency of Canada, OttawaON, Canada
| | | | | | - Travis K Chapin
- Institute of Food and Agricultural Sciences, University of Florida, GainesvilleFL, United States
| | | | - France Daigle
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, MontréalQC, Canada
| | - Michelle D Danyluk
- Institute of Food and Agricultural Sciences, University of Florida, GainesvilleFL, United States
| | | | - Ken Dewar
- McGill University, MontréalQC, Canada.,Génome Québec Innovation Center, MontréalQC, Canada
| | | | | | - Karen Fong
- Food Safety Engineering, Faculty of Land and Food Systems, University of British Columbia, VancouverBC, Canada
| | - Eric Fournier
- Laboratoire de Santé Publique du Québec, Sainte-Anne-de-BellevueQC, Canada
| | - Eelco Franz
- National Institute for Public Health and the EnvironmentBilthoven, Netherlands
| | | | - Alexander Gill
- Bureau of Microbial Hazards, Health Canada, OttawaON, Canada
| | | | - Linda Harris
- UC Davis Food Science and Technology, DavisCA, United States
| | - Carol B Huang
- UC Davis School of Veterinary Medicine, DavisCA, United States
| | | | - Roger Johnson
- National Microbiology Laboratory, Public Health Agency of Canada, OttawaON, Canada
| | - Yann Joly
- McGill University, MontréalQC, Canada
| | - Maud Kerhoas
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, MontréalQC, Canada
| | - Nguyet Kong
- UC Davis School of Veterinary Medicine, DavisCA, United States
| | | | | | | | | | | | - Walid Mottawea
- McGill University, MontréalQC, Canada.,Department of Microbiology and Immunology, Faculty of Pharmacy, Mansoura UniversityMansoura, Egypt
| | | | - Céline Nadon
- National Microbiology Laboratory, Public Health Agency of Canada, OttawaON, Canada
| | - John Nash
- National Microbiology Laboratory, Public Health Agency of Canada, OttawaON, Canada
| | | | | | - Ann Perets
- National Microbiology Laboratory, Public Health Agency of Canada, OttawaON, Canada
| | | | - Aleisha R Reimer
- National Microbiology Laboratory, Public Health Agency of Canada, OttawaON, Canada
| | - James Robertson
- National Microbiology Laboratory, Public Health Agency of Canada, OttawaON, Canada
| | - John Rohde
- Department of Microbiology and Immunology, Dalhousie University, HalifaxNS, Canada
| | | | | | - Roger Stephan
- Institute for Food Safety and Hygiene, University of ZurichZurich, Switzerland
| | - Sandeep Tamber
- Bureau of Microbial Hazards, Health Canada, OttawaON, Canada
| | | | | | - Valentine Usongo
- Laboratoire de Santé Publique du Québec, Sainte-Anne-de-BellevueQC, Canada
| | - Caroline Vincent
- Laboratoire de Santé Publique du Québec, Sainte-Anne-de-BellevueQC, Canada
| | - Siyun Wang
- Food Safety Engineering, Faculty of Land and Food Systems, University of British Columbia, VancouverBC, Canada
| | - Joel T Weadge
- Biological and Chemical Sciences, Wilfrid Laurier University, WaterlooON, Canada
| | - Martin Wiedmann
- Department of Food Science, Cornell University, IthacaNY, United States
| | - Lucas Wijnands
- National Institute for Public Health and the EnvironmentBilthoven, Netherlands
| | - Emily D Wilson
- Biological and Chemical Sciences, Wilfrid Laurier University, WaterlooON, Canada
| | - Thomas Wittum
- College of Veterinary Medicine, The Ohio State University, ColumbusOH, United States
| | - Catherine Yoshida
- National Microbiology Laboratory, Public Health Agency of Canada, OttawaON, Canada
| | - Khadija Youfsi
- Laboratoire de Santé Publique du Québec, Sainte-Anne-de-BellevueQC, Canada
| | - Lei Zhu
- McGill University, MontréalQC, Canada
| | - Bart C Weimer
- UC Davis School of Veterinary Medicine, DavisCA, United States
| | | | - Roger C Levesque
- Institute for Integrative and Systems Biology, Université Laval, Québec CityQC, Canada
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Malic L, Zhang X, Brassard D, Clime L, Daoud J, Luebbert C, Barrere V, Boutin A, Bidawid S, Farber J, Corneau N, Veres T. Polymer-based microfluidic chip for rapid and efficient immunomagnetic capture and release of Listeria monocytogenes. Lab Chip 2015; 15:3994-4007. [PMID: 26346021 DOI: 10.1039/c5lc00852b] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Infections caused by foodborne pathogens such as Listeria monocytogenes pose a threat to public health while timely detection is challenging due to pathogen low numbers. The development of robust and efficient sample preparation techniques is crucial to improve detection sensitivity and workflow. Immunomagnetic separation using magnetic nanoparticles (MNPs) is attractive, as it can efficiently capture target cells. For food safety applications, a platform is needed to rapidly process large sample volumes, allowing capture and release of target bacteria conjugated to immunomagnetic nanoparticles (IMNPs). Herein, we demonstrate a method for magnetic capture and release of bacteria-IMNPs complex based on a 3D magnetic trap integrated on a polymeric microfluidic device. The 3D magnetic capture region consist of a dense array of high-aspect ratio (3 : 1) cylindrical pillars embossed in thermoplastic polymer and coated with soft ferromagnetic nickel by an electroless deposition technique. This allows the generation of strong and switchable magnetic capture regions due to the very low remanence of the nickel shell. We propose and validate an optimized configuration of capture regions for efficient localized capture and rapid release of MNPs and IMNPs conjugated to L. monocytogenes. A maximum recovery rate for MNPs corresponded to 91% while a maximum capture efficiency of 30% was obtained for live bacteria, with a minimum detectable sample concentration of ~10 cfu ml(-1) in 1 ml volume using plate-culture method. We believe that the flexible design and low-cost fabrication process of the proposed system will allow rapid sample preparation for applications beyond food and water safety, including point-of-care diagnosis.
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Affiliation(s)
- L Malic
- Life Sciences Division, National Research Council of Canada, 75 de Mortagne Boulevard, Boucherville, QC J4B 6Y4, Canada.
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Barrere V, Falzon L, Shakya K, Menzies P, Peregrine A, Prichard R. Assessment of benzimidazole resistance in Haemonchus contortus in sheep flocks in Ontario, Canada: Comparison of detection methods for drug resistance. Vet Parasitol 2013; 198:159-65. [DOI: 10.1016/j.vetpar.2013.07.040] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Revised: 07/19/2013] [Accepted: 07/30/2013] [Indexed: 11/26/2022]
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Abalain M, Héry-Arnaud G, Gouriou S, Lintanf J, Barrere V, Segonds C, Chabanon G, Rault G, Barbier G, Payan C. Clonally identical Burkholderia cepacia complex (Bcc) sequence type strain ST32 isolated from cystic fibrosis (CF) patients in French western Brittany compared to epidemiology of Bcc strains in France using Multilocus sequence typing (MLST). J Cyst Fibros 2009. [DOI: 10.1016/s1569-1993(09)60137-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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