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Li HN, Wang T, Kang ZD, Yang YG, Li T, Yuan F. Determination of Whole Molecular of Thermostable Direct Hemolysins in Milk Powder by HPLC-ESI-TOF. J Chromatogr Sci 2024; 62:465-470. [PMID: 38213303 DOI: 10.1093/chromsci/bmad094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 08/22/2023] [Accepted: 12/22/2023] [Indexed: 01/13/2024]
Abstract
Although Vibrio parahaemolyticus (V. parahaemolyticus) is a pathogen frequently found in seafood, there is a possibility of its presence in other foods, such as dairy products. The main virulence factors of V. parahaemolyticus are thermostable direct hemolysins (TDHs) which are lethal toxins, so it is necessary to establish qualitative and quantitative methods for determining TDHs. HPLC-ESI-TOF was employed to establish a method for identifying TDHs. The identification and quantification ions of TDHs were confirmed by HPLC-ESI-TOF. The method was developed for detecting TDHs in milk powder using HPLC-ESI-TOF in this paper, and limits of detection (were between 0.20 and 0.40 mg/kg, limits of quantitation were between 0.5 and 1.0 mg/kg and recoveries of all TDHs were between from 78% to 94% with relative standard deviation lower than 10%. This research will provide a reference for developing methods of HPLC-MS/MS to detect TDHs in food samples, which can provide a tool for the government to monitor TDHs contamination in foods.
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Affiliation(s)
- Hong-Na Li
- Agro-Product Safety Research Center, Chinese Academy of Inspection and Quarantine, 11 Ronghua South Road, Beijing Economic-Technological Development Area, China
| | - Tao Wang
- Agro-Product Safety Research Center, Chinese Academy of Inspection and Quarantine, 11 Ronghua South Road, Beijing Economic-Technological Development Area, China
| | - Zhao-di Kang
- Agro-Product Safety Research Center, Chinese Academy of Inspection and Quarantine, 11 Ronghua South Road, Beijing Economic-Technological Development Area, China
| | - Yan-Ge Yang
- Agro-Product Safety Research Center, Chinese Academy of Inspection and Quarantine, 11 Ronghua South Road, Beijing Economic-Technological Development Area, China
| | - Tao Li
- Agro-Product Safety Research Center, Chinese Academy of Inspection and Quarantine, 11 Ronghua South Road, Beijing Economic-Technological Development Area, China
| | - Fei Yuan
- Agro-Product Safety Research Center, Chinese Academy of Inspection and Quarantine, 11 Ronghua South Road, Beijing Economic-Technological Development Area, China
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2
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Jin Y, Wang J, Wang Z, Xiong P, Cheng J, Xu T. An Integrated Microfluidic Biosensing System Based on a Versatile Valve and Recombinase Polymerase Amplification for Rapid and Sensitive Detection of Salmonella typhimurium. BIOSENSORS 2023; 13:790. [PMID: 37622876 PMCID: PMC10452558 DOI: 10.3390/bios13080790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 07/31/2023] [Accepted: 08/02/2023] [Indexed: 08/26/2023]
Abstract
Detecting foodborne pathogens on-site is crucial for ensuring food safety, necessitating the development of rapid, cost-effective, highly sensitive, and portable devices. This paper presents an integrated microfluidic biosensing system designed for the rapid and sensitive detection of Salmonella typhimurium (S. typhimurium). The biosensing system comprises a microfluidic chip with a versatile valve, a recombinase polymerase amplification (RPA) for nucleic acid detection, and a customized real-time fluorescence detection system. The versatile valve combines the functions of an active valve and a magnetic actuation mixer, enabling on-demand mixing and controlling fluid flow. Quantitative fluorescence is processed and detected through a custom-built smartphone application. The proposed integrated microfluidic biosensing system could detect Salmonella at concentrations as low as 1.0 × 102 copies/µL within 30 min, which was consistent with the results obtained from the real-time quantitative polymerase chain reaction (qPCR) tests. With its versatile valve, this integrated microfluidic biosensing system holds significant potential for on-site detection of foodborne pathogens.
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Affiliation(s)
- Yan Jin
- College of Information and Electrical Engineering, Shenyang Agricultural University, Shenyang 110866, China; (Y.J.)
| | - Jingyi Wang
- College of Information and Electrical Engineering, Shenyang Agricultural University, Shenyang 110866, China; (Y.J.)
- Liaoning Engineering Research Center for Information Technology in Agriculture, Shenyang 110866, China
| | - Zhiqiang Wang
- College of Information and Electrical Engineering, Shenyang Agricultural University, Shenyang 110866, China; (Y.J.)
| | - Peng Xiong
- College of Information and Electrical Engineering, Shenyang Agricultural University, Shenyang 110866, China; (Y.J.)
| | - Jianing Cheng
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang 110866, China
| | - Tongyu Xu
- College of Information and Electrical Engineering, Shenyang Agricultural University, Shenyang 110866, China; (Y.J.)
- Liaoning Engineering Research Center for Information Technology in Agriculture, Shenyang 110866, China
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3
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Lamas A, Azinheiro S, Roumani F, Prado M, Garrido-Maestu A. Evaluation of the effect of outer primer structure, and inner primer linker sequences, in the performance of Loop-mediated isothermal amplification. Talanta 2023; 260:124642. [PMID: 37167680 DOI: 10.1016/j.talanta.2023.124642] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2023] [Revised: 04/27/2023] [Accepted: 05/02/2023] [Indexed: 05/13/2023]
Abstract
Loop-mediated isothermal amplification, or LAMP, is nowadays the most popular isothermal nucleic acid amplification technique. This technique implements a minimum of four primers, named outer (F3/B3) and inner primers (FIP/BIP). The inner primers hybridize in two distinct regions, and some studies have reported that the usage of a linker, typically composed of four thymines, in the middle of these primers can improve assay performance. In addition to this, dual-priming oligonucleotides, DPO, have been reported to provide highly specific reducing non-specific amplifications. Considering the large number of primers implemented in LAMP assays, in the current study the suitability of DPO primers replacing regular outer primers; and their combination with different linker sequences in the inner primers were explored. The results demonstrated that replacing standard F3/B3 by DPO primers does not significantly affect that overall performance of the assay, and provides additional stability to temperature changes. This observations were consistent regardless the type of linker implemented in the inner primers, out of which in the current study a linker composed of thymines significantly outperformed the other options tested, most likely due to a combination of sequence and physical structure.
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Affiliation(s)
- Alexandre Lamas
- Food Hygiene, Inspection and Control Laboratory, Department of Analytical Chemistry, Nutrition and Bromatology, Universidad de Santiago de Compostela, 27002, Lugo, Spain
| | - Sarah Azinheiro
- International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga s/n, 4715-330, Braga, Portugal; Department of Analytical Chemistry, Nutrition and Food Science, Faculty of Veterinary Science, University of Santiago de Compostela, 27002, Lugo, Spain
| | - Foteini Roumani
- International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga s/n, 4715-330, Braga, Portugal; Department of Analytical Chemistry, Nutrition and Food Science, Faculty of Veterinary Science, University of Santiago de Compostela, 27002, Lugo, Spain
| | - Marta Prado
- International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga s/n, 4715-330, Braga, Portugal
| | - Alejandro Garrido-Maestu
- International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga s/n, 4715-330, Braga, Portugal.
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4
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Kabiraz MP, Majumdar PR, Mahmud MC, Bhowmik S, Ali A. Conventional and advanced detection techniques of foodborne pathogens: A comprehensive review. Heliyon 2023; 9:e15482. [PMID: 37151686 PMCID: PMC10161726 DOI: 10.1016/j.heliyon.2023.e15482] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 03/13/2023] [Accepted: 04/11/2023] [Indexed: 05/09/2023] Open
Abstract
Foodborne pathogens are a major public health concern and have a significant economic impact globally. From harvesting to consumption stages, food is generally contaminated by viruses, parasites, and bacteria, which causes foodborne diseases such as hemorrhagic colitis, hemolytic uremic syndrome (HUS), typhoid, acute, gastroenteritis, diarrhea, and thrombotic thrombocytopenic purpura (TTP). Hence, early detection of foodborne pathogenic microbes is essential to ensure a safe food supply and to prevent foodborne diseases. The identification of foodborne pathogens is associated with conventional (e.g., culture-based, biochemical test-based, immunological-based, and nucleic acid-based methods) and advances (e.g., hybridization-based, array-based, spectroscopy-based, and biosensor-based process) techniques. For industrial food applications, detection methods could meet parameters such as accuracy level, efficiency, quickness, specificity, sensitivity, and non-labor intensive. This review provides an overview of conventional and advanced techniques used to detect foodborne pathogens over the years. Therefore, the scientific community, policymakers, and food and agriculture industries can choose an appropriate method for better results.
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Affiliation(s)
- Meera Probha Kabiraz
- Department of Biotechnology, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh
| | - Priyanka Rani Majumdar
- School of Biotechnology and Biomolecular Sciences, UNSW Sydney, Kensington, NSW, 2052, Australia
- Department of Fisheries and Marine Science, Noakhali Science and Technology University, Noakhali, 3814, Bangladesh
| | - M.M. Chayan Mahmud
- CASS Food Research Centre, School of Exercise and Nutrition Sciences, Deakin University, 221 Burwood Highway, VIC, 3125, Australia
| | - Shuva Bhowmik
- Department of Fisheries and Marine Science, Noakhali Science and Technology University, Noakhali, 3814, Bangladesh
- Centre for Bioengineering and Nanomedicine, Faculty of Dentistry, Division of Health Sciences, University of Otago, Dunedin, 9054, New Zealand
- Department of Food Science, University of Otago, Dunedin, 9054, New Zealand
- Corresponding author. Centre for Bioengineering and Nanomedicine, Faculty of Dentistry, Division of Health Sciences, University of Otago, Dunedin, 9054, New Zealand.
| | - Azam Ali
- Centre for Bioengineering and Nanomedicine, Faculty of Dentistry, Division of Health Sciences, University of Otago, Dunedin, 9054, New Zealand
- Corresponding author.
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Hu YQ, Wang WY, Turmidzi F, Li FX, Fang LF, Zhou ZH, Zhang DF. Rapid and simultaneous detection of viable Vibrio parahaemolyticus, Vibrio alginolyticus, and Vibrio cholerae by PMA-mPCR assay in aquatic products. Lebensm Wiss Technol 2023. [DOI: 10.1016/j.lwt.2023.114663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
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Liu L, Hong J, Wang W, Xiao S, Xie H, Wang Q, Gan N. Fluorescent aptasensor for detection of live foodborne pathogens based on multicolor perovskite-quantum-dot-encoded DNA probes and dual-stirring-bar-assisted signal amplification. J Pharm Anal 2022; 12:913-922. [PMID: 36605572 PMCID: PMC9805940 DOI: 10.1016/j.jpha.2022.07.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 07/04/2022] [Accepted: 07/09/2022] [Indexed: 01/09/2023] Open
Abstract
In this study, a fluorescent (FL) aptasensor was developed for on-site detection of live Salmonella typhimurium (S.T.) and Vibrio parahaemolyticus (V.P.). Complementary DNA (cDNA) of aptamer (Apt)-functionalized multicolor polyhedral oligomeric silsesquioxane-perovskite quantum dots (cDNA-POSS-PQDs) were used as encoded probes and combined with dual-stirring-bar-assisted signal amplification for pathogen quantification. In this system, bar 1 was labeled with the S.T. and V.P. Apts, and then bar 2 was functionalized with cDNA-POSS-PQDs. When S.T. and V.P. were introduced, pathogen-Apt complexes would form and be released into the supernatant from bar 1. Under agitation, the two complexes reached bar 2 and subsequently reacted with cDNA-POSS-PQDs, which were immobilized on MXene. Then, the encoded probes would be detached from bar 2 to generate FL signals in the supernatant. Notably, the pathogens can resume their free state and initiate next cycle. They swim between the two bars, and the FL signals can be gradually enhanced to maximum after several cycles. The FL signals from released encoded probes can be used to detect the analytes. In particular, live pathogens can be distinguished from dead ones by using an assay. The detection limits and linear range for S.T. and V.P. were 30 and 10 CFU/mL and 102-106 CFU/mL, respectively. Therefore, this assay has broad application potential for simultaneous on-site detection of various live pathogenic bacteria in water.
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Affiliation(s)
- Liu Liu
- School of Material Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China
| | - Juncheng Hong
- School of Material Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China
| | - Wenhai Wang
- School of Material Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China
| | - Shu Xiao
- School of Material Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China
| | - Hongzhen Xie
- School of Material Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China
| | - Qiqin Wang
- Institute of Pharmaceutical Analysis, College of Pharmacy, Jinan University, Guangzhou, 510632, China,Corresponding author.
| | - Ning Gan
- School of Material Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China,Corresponding author.
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7
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Hu A, Kong L, Lu Z, Qiao J, Lv F, Meng F, Bie X. Research on nanogold-assisted HRM-qPCR technology for highly sensitive and accurate detection of Vibrio parahaemolyticus. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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8
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Tian X, Hu J, Wei T, Ding W, Miao Q, Ning Z, Fan S, Wu H, Lu J, Lyu M, Wang S. Fast and sensitive graphene oxide-DNAzyme-based biosensor for Vibrio alginolyticus detection. JOURNAL OF FISH DISEASES 2022; 45:687-697. [PMID: 35176196 DOI: 10.1111/jfd.13594] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 01/19/2022] [Accepted: 01/21/2022] [Indexed: 06/14/2023]
Abstract
DNAzymes have been widely and effectively used for the detection of pathogenic bacteria, which pose a serious public health threat. However, the rapid and cost-effective detection of such bacteria remains a major challenge. In this study, we successfully selected Vibrio alginolyticus-specific DNAzymes. The activity of the candidates was assessed via fluorescence intensity and gel electrophoresis. The DNAzyme DT1 had a detection limit of 31 CFU/ml for V. alginolyticus and exhibited high specificity. Graphene oxide (GO) was used to develop a DNAzyme-based fluorescent sensor for the detection of V. alginolyticus, which significantly improved detection performance and shortened the reaction time as little as 10 s. The proposed method was then validated using crab, shrimp, fish, clam, and oyster samples. This study thus provides a new method for the rapid and sensitive detection of V. alginolyticus.
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Affiliation(s)
- Xueqing Tian
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Jinfei Hu
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Tong Wei
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Wen Ding
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Qingzhen Miao
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Zhe Ning
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Shihui Fan
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Hangjie Wu
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Jing Lu
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Mingsheng Lyu
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Shujun Wang
- Jiangsu Key Laboratory of Marine Bioresources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang, China
- Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
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Lattos A, Chaligiannis I, Papadopoulos D, Giantsis IA, Petridou EI, Vafeas G, Staikou A, Michaelidis B. How Safe to Eat Are Raw Bivalves? Host Pathogenic and Public Health Concern Microbes within Mussels, Oysters, and Clams in Greek Markets. Foods 2021; 10:2793. [PMID: 34829074 PMCID: PMC8623680 DOI: 10.3390/foods10112793] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 11/07/2021] [Accepted: 11/11/2021] [Indexed: 12/27/2022] Open
Abstract
Raw-bivalves consumption is a wide trend in Mediterranean countries. Despite the unambiguous nutritional value of seafood, raw consumption of bivalves may involve risks that could pose a significant threat to consumers' health. Their filter-feeding behavior is responsible for the potential hosting of a wide variety of microorganisms, either pathogenic for the bivalves or public health threats. Under this prism, the current study was conducted in an effort to evaluate the risk of eating raw bivalves originating from the two biggest seafood markets in Thessaloniki, the largest production area of bivalves in Greece. Both microbiological and molecular methodologies were applied in order to assess the presence of various harmful microbes, including noroviruses, Bonamia, Marteilia, Esherichia coli, Salmonella, and Vibrio. Results indicated the presence of several Vibrio strains in the analyzed samples, of which the halophilic Vibrio harveyi was verified by 16S rRNA sequencing; other than this, no enteropathogenic Vibrio spp. was detected. Furthermore, although Esherichia coli was detected in several samples, it was mostly below the European Union (EU) legislation thresholds. Interestingly, the non-target Photobacterium damselae was also detected, which is associated with both wound infections in human and aquatic animals. Regarding host pathogenic microorganisms, apart from Vibrio harveyi, the protozoan parasite Marteilia refrigens was identified in oysters, highlighting the continuous infection of this bivalve in Greece. In conclusion, bivalves can be generally characterized as a safe-to-eat raw food, hosting more bivalve pathogenic microbes than those of public health concern.
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Affiliation(s)
- Athanasios Lattos
- Laboratory of Animal Physiology, Department of Zoology, Faculty of Science, School of Biology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (I.C.); (D.P.); (B.M.)
- Environmental Control and Research Laboratory, Region of Central Macedonia, 54625 Thessaloniki, Greece;
| | - Ilias Chaligiannis
- Laboratory of Animal Physiology, Department of Zoology, Faculty of Science, School of Biology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (I.C.); (D.P.); (B.M.)
- Hellenic Agricultural Organization-DEMETER, Veterinary Research Institute of Thessaloniki, Campus of Thermi, 57001 Thermi, Greece;
| | - Dimitrios Papadopoulos
- Laboratory of Animal Physiology, Department of Zoology, Faculty of Science, School of Biology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (I.C.); (D.P.); (B.M.)
- Environmental Control and Research Laboratory, Region of Central Macedonia, 54625 Thessaloniki, Greece;
| | - Ioannis A. Giantsis
- Environmental Control and Research Laboratory, Region of Central Macedonia, 54625 Thessaloniki, Greece;
- Department of Animal Science, Faculty of Agricultural Sciences, University of Western Macedonia, 53100 Florina, Greece
| | - Evanthia I. Petridou
- Laboratory of Microbiology and Infectious Diseases, Faculty of Veterinary Medicine, School of Health Science, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece;
| | - George Vafeas
- Hellenic Agricultural Organization-DEMETER, Veterinary Research Institute of Thessaloniki, Campus of Thermi, 57001 Thermi, Greece;
| | - Alexandra Staikou
- Environmental Control and Research Laboratory, Region of Central Macedonia, 54625 Thessaloniki, Greece;
- Department of Zoology, School of Biology, Faculty of Science, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Basile Michaelidis
- Laboratory of Animal Physiology, Department of Zoology, Faculty of Science, School of Biology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (I.C.); (D.P.); (B.M.)
- Environmental Control and Research Laboratory, Region of Central Macedonia, 54625 Thessaloniki, Greece;
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10
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Zampieri A, Babbucci M, Carraro L, Milan M, Fasolato L, Cardazzo B. Combining Culture-Dependent and Culture-Independent Methods: New Methodology Insight on the Vibrio Community of Ruditapes philippinarum. Foods 2021; 10:1271. [PMID: 34204939 PMCID: PMC8228196 DOI: 10.3390/foods10061271] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 05/30/2021] [Accepted: 05/31/2021] [Indexed: 01/01/2023] Open
Abstract
Vibrios represent a natural contaminant of seafood products. V. alginolyticus, V. cholerae, V. parahaemolyticus and V. vulnificus are the most hazardous species to human health. Given the worldwide consumption of mollusc products, reliable detection of Vibrio species is recommended to prevent human vibriosis. In this study, culture-dependent and -independent methods were compared and integrated to implement knowledge of the Manila clam Vibrio community composition. Here, 16S and recA-pyrH metabarcoding were applied to compare the microbial communities of homogenate clam samples (culture-independent method) and their culture-derived samples plated on three different media (culture-dependent method). In addition, a subset of plated clam samples was investigated using shotgun metagenomics. Homogenate metabarcoding characterized the most abundant taxa (16S) and Vibrio species (recA-pyrH). Culture-dependent metabarcoding detected the cultivable taxa, including rare species. Moreover, marine agar medium was found to be a useful substrate for the recovery of several Vibrio species, including the main human pathogenic ones. The culture-dependent shotgun metagenomics detected all the main human pathogenic Vibrio species and a higher number of vibrios with respect to the recA-pyrH metabarcoding. The study revealed that integration of culture-dependent and culture-independent methods might be a valid approach for the characterization of Vibrio biodiversity.
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Affiliation(s)
| | | | | | | | - Luca Fasolato
- Department of Comparative Biomedicine and Food Science, University of Padova, Agripolis, Viale dell’Università 16, 35020 Legnaro, Italy; (A.Z.); (M.B.); (L.C.); (M.M.); (B.C.)
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11
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Antimicrobial Resistance Gene Detection Methods for Bacteria in Animal-Based Foods: A Brief Review of Highlights and Advantages. Microorganisms 2021; 9:microorganisms9050923. [PMID: 33925810 PMCID: PMC8146338 DOI: 10.3390/microorganisms9050923] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 03/16/2021] [Accepted: 03/17/2021] [Indexed: 01/06/2023] Open
Abstract
Antimicrobial resistance is a major public health problem and is mainly due to the indiscriminate use of antimicrobials in human and veterinary medicine. The consumption of animal-based foods can contribute to the transfer of these genes between animal and human bacteria. Resistant and multi-resistant bacteria such as Salmonella spp. and Campylobacter spp. have been detected both in animal-based foods and in production environments such as farms, industries and slaughterhouses. This review aims to compile the techniques for detecting antimicrobial resistance using traditional and molecular methods, highlighting their advantages and disadvantages as well as the effectiveness and confidence of their results.
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12
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Hong J, Wang W, Wang J, Wang X, Xie H, Li T, Gan N. A turn-on-type fluorescence resonance energy transfer aptasensor for vibrio detection using aptamer-modified polyhedral oligomeric silsesquioxane-perovskite quantum dots/Ti 3C 2 MXenes composite probes. Mikrochim Acta 2021; 188:45. [PMID: 33479797 DOI: 10.1007/s00604-020-04679-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 12/01/2020] [Indexed: 10/22/2022]
Abstract
A pair of composite probes based on aptamer modified polyhedral oligomeric silsesquioxane-perovskite quantum dots (POSS-PQDs-Apt) as signal probe and titanium carbide (Ti3C2) MXenes as quencher were prepared for the first time. They were employed to fabricate one turn-on-type aptasensor relying on fluorescence resonance energy transfer (FRET) for Vibrio parahaemolyticus (VP) determination. The POSS-PQDs-Apt can be adsorbed on the MXenes nanosheets, and its fluorescence was quenched due to the FRET. After the composite probes were incubated with VP for 50 min, the POSS-PQDs-Apt binding with VP can be released from the surface of MXenes, and the signal recovered due to its higher affinity to the VP than MXenes. The fluorescence intensity from 519 nm emission of the system was measured at 480 nm excitation. Under In optimized conditions, the assay can determine VP in the concentration range 102 - 106 cfu/mL, and the detection limit (LOD) was 30 cfu/mL using fluorescence detection. The LOD is still 100 cfu/mL by naked eye detection which is proper for on-line monitoring VP in aquaculture water. This method was also used to detect VP in actual samples of seawater, the recovery of spiked samples was between 93% and 106%, and relative standard deviation (RSD) was between 2.7% and 6.7%. The result is consistent with the plate count. Therefore, this assay could provide a candidate platform for screening VP in aquaculture industry.
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Affiliation(s)
- Juncheng Hong
- School of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Wenhai Wang
- School of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Jiaqi Wang
- School of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Xiao Wang
- School of medicine, Ningbo University, Ningbo, 315211, China
| | - Hongzhen Xie
- School of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China
| | - Tianhua Li
- School of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China.
| | - Ning Gan
- School of Material Science and Chemical Engineering, Ningbo University, Ningbo, 315211, China.
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de Souza Valente C, Wan AHL. Vibrio and major commercially important vibriosis diseases in decapod crustaceans. J Invertebr Pathol 2021; 181:107527. [PMID: 33406397 DOI: 10.1016/j.jip.2020.107527] [Citation(s) in RCA: 69] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 12/25/2020] [Accepted: 12/28/2020] [Indexed: 12/18/2022]
Abstract
Bacteria fromthe Vibriogenus are autochthonous to aquatic environments and ubiquitous in aquaculture production systems. Many Vibrio species are non-pathogenic and can be commonly found in healthy farmed aquatic animals. However, some Vibrio species and strains are pathogenic leading to a variety of 'vibriosis' diseases. These diseases can have a significant negative impact on animal production, including farmed crustaceans such as shrimps, lobsters, and crabs. As such, vibriosis can pose a threat to meeting growing food demand and global food security. Preventive management is essential to avoid the onset of vibriosis. This includes a robust health management plan, the use of prophylaxis and treatment measures, and enhancing animal health through nutrition. Furthermore, the use of probiotics, prebiotics, synbiotics, quorum sensing disruption, green water, biofloc, bacteriophages, and immune priming could also play a role in preventing and controlling a vibriosis outbreak. This review aims to inform and update the reader about the current state of knowledge about Vibrio and associated vibriosis in farmed crustaceans (i.e. shrimp, lobster, and crabs). Furthermore, the review will identify potential knowledge gaps in the literature, which serves as a basis for future research priorities.
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Affiliation(s)
- Cecília de Souza Valente
- Aquaculture and Nutrition Research Unit, Room 204, Annex Building, Ryan Institute and School of Natural Sciences, National University of Ireland Galway, Galway City H91 TK33, Ireland; Aquaculture and Nutrition Research Unit, Carna Research Station, Ryan Institute, National University of Ireland Galway, Carna, Connemara, Co. Galway H91 V8Y1, Ireland.
| | - Alex H L Wan
- Aquaculture and Nutrition Research Unit, Room 204, Annex Building, Ryan Institute and School of Natural Sciences, National University of Ireland Galway, Galway City H91 TK33, Ireland; Aquaculture and Nutrition Research Unit, Carna Research Station, Ryan Institute, National University of Ireland Galway, Carna, Connemara, Co. Galway H91 V8Y1, Ireland
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14
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Development of a lateral flow test strip for simultaneous detection of BT-Cry1Ab, BT-Cry1Ac and CP4 EPSPS proteins in genetically modified crops. Food Chem 2020; 335:127627. [PMID: 32738534 DOI: 10.1016/j.foodchem.2020.127627] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 07/16/2020] [Accepted: 07/18/2020] [Indexed: 11/24/2022]
Abstract
A colloidal gold immunochromatographic strip (ICS) for simultaneous detection of multiple transgenic proteins, including CP4 EPSPS, BT-Cry1Ab and BT-Cry1Ac, was developed in this study. The sensitivity of the strip to the target protein was 5 ng/mL for CP4 EPSPS, 100 ng/mL for BT-Cry1Ab and Cry1Ac, respectively. Parallel analysis for maize, soybean, sugar beet and cotton showed the strip could detect 1% of transgenic content in crops containing BT-Cry1Ab and Cry1Ac, and, at least, 0.1% of content in crops containing CP4 EPSPS. The detection results for seed samples indicated the multicomponent analysis ICS had good accuracy. The analysis could be completed within 10 min and had the advantages of being high-throughput, easy to operate and visual detection. This is the first report of semi-quantitative ICS for detecting three transgenic proteins simultaneously. The developed approach may provide insights into the development of ICS for analyzing simultaneously multiple components in genetically modified crops.
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15
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Liu J, Zhan Z, Liang T, Xie G, Aguilar ZP, Xu H. Dual-signal amplification strategy: Universal asymmetric tailing-PCR triggered rolling circle amplification assay for fluorescent detection of Cronobacter spp. in milk. J Dairy Sci 2020; 103:3055-3065. [PMID: 32037161 DOI: 10.3168/jds.2019-17590] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Accepted: 12/08/2019] [Indexed: 01/19/2023]
Abstract
Cronobacter spp. are important opportunistic foodborne pathogens in powdered infant formula that cause many serious diseases in neonates and infants. In this study, a novel assay based on dual signal amplification strategy was developed by coupling asymmetric tailing PCR (AT-PCR) with rolling circle amplification (RCA) for the detection of Cronobacter spp. in milk. The tailing single-stranded DNA was generated through AT-PCR and used to initiate RCA, generating tandem repetitive G-quadruplex sequences. In the presence of the fluorescence dye thioflavin T that could intercalate into the G-quadruplex structures, the fluorescence signal was detected with a microplate reader. The AT-PCR coupled with RCA assay was specific for Cronobacter spp. detection because of the highly specific primers chosen for the AT-PCR. The limits of detection were 4.3 × 101 cfu/mL in pure culture and 4.5 × 102 cfu/mL in spiked milk, respectively. The fixed sequences designed in the hairpin DNA allowed this AT-PCR coupled with RCA assay to serve as a universal platform for the detection of other pathogens by modifying the specificity of the PCR primers.
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Affiliation(s)
- Ju Liu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330047, PR China
| | - Zhongxu Zhan
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330047, PR China; Jiangxi Institute for Food Control, Nanchang, 330001, PR China
| | - Taobo Liang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330047, PR China
| | - Guoyang Xie
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330047, PR China
| | | | - Hengyi Xu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330047, PR China.
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16
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Wang M, Yan Y, Wang R, Wang L, Zhou H, Li Y, Tang L, Xu Y, Jiang Y, Cui W, Qiao X. Simultaneous Detection of Bovine Rotavirus, Bovine Parvovirus, and Bovine Viral Diarrhea Virus Using a Gold Nanoparticle-Assisted PCR Assay With a Dual-Priming Oligonucleotide System. Front Microbiol 2019; 10:2884. [PMID: 31921061 PMCID: PMC6920155 DOI: 10.3389/fmicb.2019.02884] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 11/29/2019] [Indexed: 12/17/2022] Open
Abstract
Bovine rotavirus (BRV), bovine parvovirus (BPV), and bovine viral diarrhea virus (BVDV) are the pathogens that cause diarrhea primarily in newborn calves. A mixed infection of BRV, BPV, and BVDV makes clinical diagnosis difficult. In this study, we designed dual-priming oligonucleotide (DPO) primers the VP6 gene of BRV, VP2 gene of BPV, and 5′UTR gene of BVDV and synthesized gold nanoparticles (GNPs) with an average diameter of 10 nm. We combined the DPOs with the GNPs to develop a DPO-nanoPCR assay for detecting BRV, BPV, and BVDV. The annealing temperature, primer concentration, and GNP concentration were optimized for this assay. Compared to a conventional PCR assay, the DPO-nanoPCR assay allowed the use of a wider range of annealing temperatures (41–65°C) to effectively amplify target genes. PCR amplification was the most efficient at 56.2°C using conventional primers. The optimal volume of all the primers (10 μM) was 1.0 μL. The optimal volume of GNPs (10 nM) for all the reactions was 0.5 μL. The detection limits of DPO-nanoPCR for pMD19-T-VP6, pMD19-T-VP2, and pMD19-T-5′UTR were 9.40 × 102 copies/μL, 5.14 × 103 copies/μL, and 4.09 × 101 copies/μL, respectively; and those using conventional PCR were 9.40 × 104 copies/μL, 5.14 × 105 copies/μL, and 4.09 × 104 copies/μL, respectively. The sensitivity of DPO-nanoPCR was at least 100-fold higher than that of conventional PCR. The specificity detection showed that the DPO-nanoPCR was able to specifically detect BRV, BPV, and BVDV. Use of clinical samples indicated that target viruses can be detected accurately. Thus, DPO-nanoPCR is a new powerful, simple, specific, and sensitive tool for detecting mixed infections of BRV, BPV, and BVDV.
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Affiliation(s)
- Mengmeng Wang
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
| | - Yue Yan
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
| | - Ruichong Wang
- Department for Radiological Protection, Heilongjiang Province Center for Disease Control and Prevention, Harbin, China
| | - Li Wang
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
| | - Han Zhou
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
| | - Yijing Li
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
| | - Lijie Tang
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
| | - Yigang Xu
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
| | - Yanping Jiang
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
| | - Wen Cui
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
| | - Xinyuan Qiao
- Heilongjiang Key Laboratory for Animal Disease Control and Pharmaceutical Development, Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, China
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17
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Simultaneous detection of five pig viruses associated with enteric disease in pigs using EvaGreen real-time PCR combined with melting curve analysis. J Virol Methods 2019; 268:1-8. [PMID: 30844408 DOI: 10.1016/j.jviromet.2019.03.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 03/02/2019] [Accepted: 03/02/2019] [Indexed: 12/14/2022]
Abstract
In recent years, a series of porcine diarrhea viruses such as porcine epidemic diarrhea virus (PEDV), transmissible gastroenteritis virus (TGEV), rotaviruses of group A (RVA), rotaviruses of group C (RVC), and porcine circovirus 2 (PCV2) caused enormous economic losses all over the world. While any of these viruses is capable to cause disease alone, there is often concurrent infection with more than one virus on pig farms. In this study, a multiplex real-time PCR method based on EvaGreen fluorescent dye and melting curve analysis was established to simultaneously detect these five viruses in a single closed tube. Five distinct melt peaks were obtained with different melting temperature (Tm) value corresponding to each of the five viruses. This method was highly sensitive to detect and distinguish TGEV, RVA, RVC, PEDV and PCV2 with the limits of detection ranging from 5 to 50 copies/μL. The intra-assay and inter-assay reproducibility were good with coefficient of variation of Tm and cycle threshold values less than 0.32% and 2.86%, respectively. Testing of 90 field samples by the single and multiplex real-time PCR assays demonstrated a concordance of 91.1%. Thus, the EvaGreen multiplex real-time PCR is a rapid, sensitive and low-cost diagnostic tool for differential detection and routine surveillance of TGEV, RVA, RVC, PEDV and PCV2 in pigs.
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18
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19
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20
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Rodrigues PA, Ferrari RG, Conte-Junior CA. Application of molecular tools to elucidate the microbiota of seafood. J Appl Microbiol 2018; 124:1347-1365. [PMID: 29345036 DOI: 10.1111/jam.13701] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 01/09/2018] [Accepted: 01/11/2018] [Indexed: 12/19/2022]
Abstract
The aim of this review is to present the methodologies currently applied to identify microbiota and pathogens transmitted to humans through seafood consumption, focusing on molecular techniques and pointing out their importance, advantages, disadvantages and applicability. Knowledge of available techniques allows researchers to identify which technique best fits their expectations. With such discernment, it will be possible to infer which disadvantages will be present and, therefore, not interfering with the final result. Two methodologies can be employed for this purpose, dependent and independent cultures. However, the dependent culture has certain limitations that can be solved through the independent cultivation techniques, such as PCR, PFGE and NGS, especially through the sequencing of the 16S rRNA region, providing a complete view of microbial diversity. These have revolutionized microbiological knowledge, mainly because they allow for the identification of uncultivable micro-organisms, which represent a substantial portion of total micro-organisms, making it possible to elucidate not yet described taxa which may display pathogenic potential, besides quantifying microbial communities, microbiota genetics, translated proteins and produced metabolites. In addition, transcriptomic and metabolomic techniques also allow for the evaluation of possible impacts that microbial communities may create in their environment, as well as the determination of potential pathogenicity to humans.
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Affiliation(s)
- P A Rodrigues
- Department of Food Technology, Faculty of Veterinary, Molecular & Analytical Laboratory Center, Universidade Federal Fluminense, Niterói, Brazil
| | - R G Ferrari
- Department of Food Technology, Faculty of Veterinary, Molecular & Analytical Laboratory Center, Universidade Federal Fluminense, Niterói, Brazil.,Chemistry Institute, Food Science Program, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - C A Conte-Junior
- Department of Food Technology, Faculty of Veterinary, Molecular & Analytical Laboratory Center, Universidade Federal Fluminense, Niterói, Brazil.,Chemistry Institute, Food Science Program, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.,National Institute of Health Quality Control, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
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21
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Bonnin-Jusserand M, Copin S, Le Bris C, Brauge T, Gay M, Brisabois A, Grard T, Midelet-Bourdin G. Vibrio species involved in seafood-borne outbreaks (Vibrio cholerae, V. parahaemolyticus and V. vulnificus): Review of microbiological versus recent molecular detection methods in seafood products. Crit Rev Food Sci Nutr 2017; 59:597-610. [DOI: 10.1080/10408398.2017.1384715] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Maryse Bonnin-Jusserand
- Univ. Littoral Côte d'Opale, convention ANSES, EA 7394 – ICV – Institut Charles Viollette, Boulogne-sur-Mer, France
- INRA, France
- Univ. Lille, Lille, France
- ISA, Lille, France
- Univ. Artois, Arras, France
| | - Stéphanie Copin
- French Agency for Food, Environmental and Occupational Health & Safety (ANSES), Laboratory for Food Safety, Boulevard du Bassin Napoléon, Boulogne-sur-Mer, France
| | - Cédric Le Bris
- Univ. Littoral Côte d'Opale, convention ANSES, EA 7394 – ICV – Institut Charles Viollette, Boulogne-sur-Mer, France
| | - Thomas Brauge
- French Agency for Food, Environmental and Occupational Health & Safety (ANSES), Laboratory for Food Safety, Boulevard du Bassin Napoléon, Boulogne-sur-Mer, France
| | - Mélanie Gay
- French Agency for Food, Environmental and Occupational Health & Safety (ANSES), Laboratory for Food Safety, Boulevard du Bassin Napoléon, Boulogne-sur-Mer, France
| | - Anne Brisabois
- French Agency for Food, Environmental and Occupational Health & Safety (ANSES), Laboratory for Food Safety, Boulevard du Bassin Napoléon, Boulogne-sur-Mer, France
| | - Thierry Grard
- Univ. Littoral Côte d'Opale, convention ANSES, EA 7394 – ICV – Institut Charles Viollette, Boulogne-sur-Mer, France
| | - Graziella Midelet-Bourdin
- French Agency for Food, Environmental and Occupational Health & Safety (ANSES), Laboratory for Food Safety, Boulevard du Bassin Napoléon, Boulogne-sur-Mer, France
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22
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A pilot study on PCR-based detection of four foodborne pathogenic microorganisms. JOURNAL OF FOOD MEASUREMENT AND CHARACTERIZATION 2017. [DOI: 10.1007/s11694-017-9680-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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23
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Xin L, Zhang L, Meng Z, Lin K, Zhang S, Han X, Yi H, Cui Y. Development of a novel loop-mediated isothermal amplification assay for the detection of lipolytic Pseudomonas fluorescens in raw cow milk from north China. J Dairy Sci 2017; 100:7802-7811. [PMID: 28780114 DOI: 10.3168/jds.2017-12740] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 06/17/2017] [Indexed: 01/23/2023]
Abstract
Lipases secreted by psychrotrophic bacteria are known to be heat resistant and can remain active even after the thermal processing of milk products. Such enzymes are able to destabilize the quality of milk products by causing a rancid flavor. Rapid detection of a small amount of heat-resistant lipase-producing psychrotrophic bacteria is crucial for reducing their adverse effects on milk quality. In this study, we established and optimized a novel loop-mediated isothermal amplification (LAMP) assay for the detection of Pseudomonas fluorescens in raw cow milk, as the most frequently reported heat-resistant lipase-producing bacterial species. Pseudomonas fluorescens-specific DNA primers for LAMP were designed based on the lipase gene sequence. Reaction conditions of the LAMP assay were tested and optimized. The detection limit of the optimized LAMP assay was found to be lower than that of a conventional PCR-based method. In pure culture, the detection limit of the LAMP assay was found to be 4.8 × 101 cfu/reaction of the template DNA, whereas the detection limit of the PCR method was 4.8 × 102 cfu/reaction. Evaluation of the performance of the method in P. fluorescens-contaminated pasteurized cow milk revealed a detection limit of 7.4 × 101 cfu/reaction, which was 102 lower than that of the PCR-based method. If further developed, the LAMP assay could offer a favorable on-farm alternative to existing technologies for the detection of psychotrophic bacterial contamination of milk, enabling improved quality control of milk and milk products.
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Affiliation(s)
- Liang Xin
- Department of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China
| | - Lanwei Zhang
- Department of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China; College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
| | - Zhaoxu Meng
- Department of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China
| | - Kai Lin
- Department of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China
| | - Shuang Zhang
- Food College, Northeast Agricultural University, Harbin 150030, China
| | - Xue Han
- Department of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China
| | - HuaXi Yi
- College of Food Science and Engineering, Ocean University of China, Qingdao 266003, China.
| | - Yanhua Cui
- Department of Food Science and Engineering, Harbin Institute of Technology, Harbin 150090, China
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