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Li X, Zhang X, Shi X, Shi H, Wang Z, Peng C. Review in isothermal amplification technology in food microbiological detection. Food Sci Biotechnol 2022; 31:1501-1511. [PMID: 36119387 PMCID: PMC9469833 DOI: 10.1007/s10068-022-01160-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 08/16/2022] [Accepted: 08/21/2022] [Indexed: 11/04/2022] Open
Abstract
Food-borne diseases caused by microbial contamination have always been a matter of great concern to human beings. Hence, the research on these problems has never stopped. With the development of microorganism amplification technology, more and more detection methods have come into our vision. However, traditional detection technologies presents more or less drawbacks, such as complicated operation, low accuracy, low sensitivity, long-time detection, and so on. Therefore, more convenient, accurate, and sensitive measurement for the microorganism are needed. Isothermal amplification technology is one of the alternative approach containing the above mentioned advantages. This work mainly summarizes the principles of loop-mediated isothermal amplification (LAMP) and rolling circle amplification (RCA) which belong to isothermal amplification. Meanwhile, the application of LAMP and RCA in food microorganism detection is introduced.
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Xie M, Chen T, Xin X, Cai Z, Dong C, Lei B. Multiplex detection of foodborne pathogens by real-time loop-mediated isothermal amplification on a digital microfluidic chip. Food Control 2022. [DOI: 10.1016/j.foodcont.2022.108824] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Zhang J, Wang L, Shi L, Chen X, Liang M, Zhao L. Development and application of a real-time loop-mediated isothermal amplification method for quantification of Acetobacter aceti in red wine. FEMS Microbiol Lett 2020; 367:5918383. [PMID: 33021644 DOI: 10.1093/femsle/fnaa152] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 10/03/2020] [Indexed: 01/01/2023] Open
Abstract
This study reports the development and optimization of a real-time loop-mediated isothermal amplification (qLAMP) method for rapid detection of Acetobacter aceti strain in red wine samples. Our results showed that the primers and probes designed for 16S rRNA were effective for A. aceti detection. The quantification limit of real-time polymerase chain reaction (qPCR) and qLAMP in pure culture was 2.05 × 101 colony forming units (CFU) mL-1. qLAMP had a sensitivity of 6.88 × 101 CFU mL-1 in artificially contaminated Changyu dry red wine (CDRW) and Changyu red wine (CRW), and 6.88 × 102 CFU mL-1 in artificially contaminated Greatwall dry red wine (GDRW), which was 10 times higher than that of qPCR. In conclusion, this newly developed qLAMP is a reliable, rapid and accurate method for the detection and quantification of A. aceti species in red wine samples. Furthermore, our work provides a standard reference method for the quantitative detection of A. aceti and other acetic acid bacteria during the fermentation and storage of red wine samples.
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Affiliation(s)
- Jingfeng Zhang
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Science, South China Agricultural University, Guangzhou, 510642, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
| | - Li Wang
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Science, South China Agricultural University, Guangzhou, 510642, China
| | - Lei Shi
- Institute of Food Safety and Nutrition, Jinan University, Guangzhou, 510632, China
| | - Xun Chen
- Institute of Food Safety and Nutrition, Jinan University, Guangzhou, 510632, China
| | - Meidan Liang
- Guagnzhou Institute for Food Inspection, Guangzhou, 510006, China
| | - Lichao Zhao
- Guangdong Provincial Key Laboratory of Nutraceuticals and Functional Foods, College of Food Science, South China Agricultural University, Guangzhou, 510642, China.,Guangdong Laboratory for Lingnan Modern Agriculture, Guangzhou 510642, China
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Wang L, Zhao P, Si X, Li J, Dai X, Zhang K, Gao S, Dong J. Rapid and Specific Detection of Listeria monocytogenes With an Isothermal Amplification and Lateral Flow Strip Combined Method That Eliminates False-Positive Signals From Primer-Dimers. Front Microbiol 2020; 10:2959. [PMID: 32117075 PMCID: PMC7025549 DOI: 10.3389/fmicb.2019.02959] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Accepted: 12/09/2019] [Indexed: 12/19/2022] Open
Abstract
Listeria monocytogenes is an important foodborne pathogenic bacterium that is explicitly threatening public health and food safety. Rapid, simple, and sensitive detection methods for this pathogen are of urgent need for the increasing on-site testing demands. Application of the isothermal recombinase polymerase amplification (RPA) and the lateral flow strip (LFS) in the detection is promising for fast speed, high sensitivity, and little dependency on equipment and trained personnel. However, the simplicity comes with an intrinsic and non-negligible risk, the false-positive signals from primer–dimers. In this study, an improved RPA–LFS system was established for detection of L. monocytogenes that eliminated false-positive signals from primer–dimers. Primer candidates were carefully selected from the entire L. monocytogenes genome sequence and rigorously screened for specific amplifications in PCR and RPA reactions. For the optimal primer pairs, probes that matched the targeted fragment sequences, although had the smallest chance to form cross-dimers with the primers, were designed and screened. The intelligent use of the probe successfully linked the positive signal to the actual amplification product. This RPA–LFS system was highly specific to L. monocytogenes and was able to detect as low as 1 colony-forming unit of the bacterium per reaction (50 μl) without DNA purification, or 100 fg of the genomic DNA/50 μl. The amplification could be conducted under the temperature between 37 and 42°C, and the whole detection finished within 25 min. Test of artificially contaminated milk gave 100% accuracy of detection without purification of the samples. Various food samples spiked with 10 colony-forming unit of L. monocytogenes per 25 g or 25 ml were successfully detected after an enrichment time period of 6 h. The RPA–LFS system established in this study is a rapid, simple, and specific detection method for L. monocytogenes that has eliminated false-positive results from primer–dimers. In addition, this study has set a good example of eliminating the false-positive risk from primer–dimers in isothermal amplification-based detection methods, which is applicable to the development of detection technologies for other pathogens.
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Affiliation(s)
- Lei Wang
- Jiangsu Key Laboratory of Marine Biological Resources and Environment, Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Panpan Zhao
- College of Veterinary Medicine, Jilin University, Changchun, China
| | - Xinxin Si
- Jiangsu Key Laboratory of Marine Biological Resources and Environment, Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Juan Li
- Wuhan Institute for Food and Cosmetic Control, Wuhan, China
| | - Xiaofang Dai
- Wuhan Institute for Food and Cosmetic Control, Wuhan, China
| | - Kunxiao Zhang
- Jiangsu Key Laboratory of Marine Biological Resources and Environment, Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
| | - Song Gao
- School of Pharmacy, Jiangsu Ocean University, Lianyungang, China
| | - Jingquan Dong
- Jiangsu Key Laboratory of Marine Biological Resources and Environment, Jiangsu Key Laboratory of Marine Pharmaceutical Compound Screening, Co-Innovation Center of Jiangsu Marine Bio-industry Technology, Jiangsu Ocean University, Lianyungang, China
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Zhan LZ, Song DF, Gu Q, Yan TT, Ma CC. Reverse transcription – loop-mediated isothermal amplification assay for the rapid detection of pathogenic Listeria monocytogenes in meat products. Can J Microbiol 2019; 65:913-921. [DOI: 10.1139/cjm-2019-0114] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
This study reports the use of reverse transcription – loop-mediated isothermal amplification (RT–LAMP) to detect Listeria monocytogenes in meat. The assay was designed to target the iap gene of L. monocytogenes, to which four primers, recognizing six distinct iap sites, were designed. We optimized the RT–LAMP conditions and established the following optimal systems: 60 min, 63 °C, 2.0 mmol/L MgSO4, 1.0 mol/L betaine, 2.0 mmol/L dNTPs, 320 U/mL Bst DNA polymerase, 0.4 μmol/L outer primers, and 0.8 μmol/L inner primers. The RT–LAMP amplification products were identified by a visible white Mg2P2O7 precipitate or electrophoresis on a 2% agarose gel. RT–LAMP has a sensitivity of 7.3 × 101 CFU/mL, which is 2-fold higher than that of LAMP. When commercially available raw meat samples (including beef, pork, mutton, and rabbit) were analyzed simultaneously with RT–LAMP and the Chinese National Standard GB 4789.30-2016, their abilities to detect L. monocytogenes were the same. Samples containing L. monocytogenes killed by 15 psi at 121 °C for 15 min were used to confirm the specificity of RT–LAMP for live microorganisms. Thus, we used RT–LAMP to efficiently detect L. monocytogenes in meat products.
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Affiliation(s)
- Ling-Zhi Zhan
- Key Laboratory for Food Microbial Technology of Zhejiang Province, Zhejiang Gongshang University, No. 18, Xuezheng Street, Hangzhou 310018, China
- Key Laboratory for Food Microbial Technology of Zhejiang Province, Zhejiang Gongshang University, No. 18, Xuezheng Street, Hangzhou 310018, China
| | - Da-Feng Song
- Key Laboratory for Food Microbial Technology of Zhejiang Province, Zhejiang Gongshang University, No. 18, Xuezheng Street, Hangzhou 310018, China
- Key Laboratory for Food Microbial Technology of Zhejiang Province, Zhejiang Gongshang University, No. 18, Xuezheng Street, Hangzhou 310018, China
| | - Qing Gu
- Key Laboratory for Food Microbial Technology of Zhejiang Province, Zhejiang Gongshang University, No. 18, Xuezheng Street, Hangzhou 310018, China
- Key Laboratory for Food Microbial Technology of Zhejiang Province, Zhejiang Gongshang University, No. 18, Xuezheng Street, Hangzhou 310018, China
| | - Ting-Ting Yan
- Key Laboratory for Food Microbial Technology of Zhejiang Province, Zhejiang Gongshang University, No. 18, Xuezheng Street, Hangzhou 310018, China
- Key Laboratory for Food Microbial Technology of Zhejiang Province, Zhejiang Gongshang University, No. 18, Xuezheng Street, Hangzhou 310018, China
| | - Cong-Cong Ma
- Key Laboratory for Food Microbial Technology of Zhejiang Province, Zhejiang Gongshang University, No. 18, Xuezheng Street, Hangzhou 310018, China
- Key Laboratory for Food Microbial Technology of Zhejiang Province, Zhejiang Gongshang University, No. 18, Xuezheng Street, Hangzhou 310018, China
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Ibarra-Meneses AV, Cruz I, Chicharro C, Sánchez C, Biéler S, Broger T, Moreno J, Carrillo E. Evaluation of fluorimetry and direct visualization to interpret results of a loop-mediated isothermal amplification kit to detect Leishmania DNA. Parasit Vectors 2018; 11:250. [PMID: 29665825 PMCID: PMC5905109 DOI: 10.1186/s13071-018-2836-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 04/06/2018] [Indexed: 11/13/2022] Open
Abstract
Background Nucleic acid amplification tests (NAATs) have proven to be advantageous in the diagnosis of leishmaniases, allowing sensitive diagnosis of: (i) cutaneous leishmaniasis in long duration lesions and (ii) visceral leishmaniasis using a less-invasive sample like peripheral blood, in opposition to tissue aspiration required for parasite demonstration by microscopy. Despite their benefits, the implementation of NAATs for leishmaniasis diagnosis at the point-of-care has not been achieved yet, mostly due to the complexity and logistical issues associated with PCR-based methods. Methods In this work, we have evaluated the performance of a ready-to-use loop-mediated isothermal amplification (LAMP) kit using two real time fluorimeters to amplify leishmanial DNA obtained by silica column-based and Boil & Spin protocols. Results The different approaches used to run and interpret the LAMP reactions showed a performance equivalent to PCR and real-time PCR, using spiked and clinical samples. The time to positivity obtained with real-time fluorimetry showed an excellent correlation with both Ct values and parasite load from real-time quantitative PCR. Conclusions The results obtained open the possibility of using a highly stable, ready-to-use LAMP kit for the accurate diagnosis of leishmaniasis at the point-of-care. Furthermore, the feasibility of relating time to positivity, determined with a portable real-time fluorimeter, with the parasite burden could have a wider application in the management of leishmaniasis, such as in treatment efficacy monitoring or as a pharmacodynamics tool in clinical trials.
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Affiliation(s)
- Ana V Ibarra-Meneses
- WHO Collaborating Centre for Leishmaniasis, National Centre for Microbiology, Instituto de Salud Carlos III, Madrid, Spain
| | - Israel Cruz
- Foundation for Innovative New Diagnostics, Geneva, Switzerland
| | - Carmen Chicharro
- WHO Collaborating Centre for Leishmaniasis, National Centre for Microbiology, Instituto de Salud Carlos III, Madrid, Spain
| | - Carmen Sánchez
- WHO Collaborating Centre for Leishmaniasis, National Centre for Microbiology, Instituto de Salud Carlos III, Madrid, Spain
| | - Sylvain Biéler
- Foundation for Innovative New Diagnostics, Geneva, Switzerland
| | - Tobias Broger
- Foundation for Innovative New Diagnostics, Geneva, Switzerland
| | - Javier Moreno
- WHO Collaborating Centre for Leishmaniasis, National Centre for Microbiology, Instituto de Salud Carlos III, Madrid, Spain
| | - Eugenia Carrillo
- WHO Collaborating Centre for Leishmaniasis, National Centre for Microbiology, Instituto de Salud Carlos III, Madrid, Spain.
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Wong YP, Othman S, Lau YL, Radu S, Chee HY. Loop-mediated isothermal amplification (LAMP): a versatile technique for detection of micro-organisms. J Appl Microbiol 2018; 124:626-643. [PMID: 29165905 PMCID: PMC7167136 DOI: 10.1111/jam.13647] [Citation(s) in RCA: 341] [Impact Index Per Article: 56.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Revised: 11/09/2017] [Accepted: 11/13/2017] [Indexed: 12/11/2022]
Abstract
Loop‐mediated isothermal amplification (LAMP) amplifies DNA with high specificity, efficiency and rapidity under isothermal conditions by using a DNA polymerase with high displacement strand activity and a set of specifically designed primers to amplify targeted DNA strands. Following its first discovery by Notomi et al. (2000Nucleic Acids Res 28: E63), LAMP was further developed over the years which involved the combination of this technique with other molecular approaches, such as reverse transcription and multiplex amplification for the detection of infectious diseases caused by micro‐organisms in humans, livestock and plants. In this review, available types of LAMP techniques will be discussed together with their applications in detection of various micro‐organisms. Up to date, there are varieties of LAMP detection methods available including colorimetric and fluorescent detection, real‐time monitoring using turbidity metre and detection using lateral flow device which will also be highlighted in this review. Apart from that, commercialization of LAMP technique had also been reported such as lyophilized form of LAMP reagents kit and LAMP primer sets for detection of pathogenic micro‐organisms. On top of that, advantages and limitations of this molecular detection method are also described together with its future potential as a diagnostic method for infectious disease.
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Affiliation(s)
- Y-P Wong
- Department of Medical Microbiology and Parasitology, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Malaysia
| | - S Othman
- Department of Medical Microbiology and Parasitology, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Malaysia
| | - Y-L Lau
- Department of Parasitology, Faculty of Medicine, Tropical Infectious Diseases Research and Education Centre (TIDREC), University of Malaya, Kuala Lumpur, Malaysia
| | - S Radu
- Centre of Excellence for Food Safety Research (FOSREC), Faculty of Food Science and Technology, Universiti Putra Malaysia, Serdang, Malaysia
| | - H-Y Chee
- Department of Medical Microbiology and Parasitology, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Malaysia
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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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Gao W, Huang H, Zhang Y, Zhu P, Yan X, Fan J, Chen X. Recombinase Polymerase Amplification-Based Assay for Rapid Detection of Listeria monocytogenes in Food Samples. FOOD ANAL METHOD 2016. [DOI: 10.1007/s12161-016-0775-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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