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Natsuhara D, Kiba Y, Saito R, Okamoto S, Nagai M, Yamauchi Y, Kitamura M, Shibata T. A sequential liquid dispensing method in a centrifugal microfluidic device operating at a constant rotational speed for the multiplexed genetic detection of foodborne pathogens. RSC Adv 2024; 14:22606-22617. [PMID: 39021458 PMCID: PMC11253859 DOI: 10.1039/d4ra04055d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2024] [Accepted: 07/10/2024] [Indexed: 07/20/2024] Open
Abstract
This study proposes a sequential liquid dispensing method using a centrifugal microfluidic device operating at a constant rotational speed for the multiplexed genetic detection of nucleic acid targets across multiple samples in a single operation. A pair of passive valves integrated into each microchamber enabled the liquid to fill towards the center of rotation against the centrifugal force, facilitating the complete removal of air inside the microchamber. Liquid manipulation can be achievable without any surface coating of the device by exploiting the inherent hydrophobicity of the polymer. Furthermore, design guidelines for the optimization of microfluidic devices are clarified. Consequently, our proposed method allows direct liquid dispensing into the reaction chambers without cross-contamination while simultaneously metering the sample/reagent volume for the colorimetric loop-mediated isothermal amplification (LAMP) reaction. In addition, we demonstrated the simultaneous detection of four foodborne pathogens (Salmonella spp., Vibrio parahaemolyticus, Campylobacter spp., and norovirus genogroup II (GII)) across four samples in a centrifugal microfluidic device within 60 min. Furthermore, the device exhibited high quantitation (R 2 > 0.98) of the DNA concentration in the sample. Our proposed method enables a more compact design by eliminating the need for metering chambers and offers a point-of-care testing platform with high simplicity as it operates at a constant rotational speed.
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Affiliation(s)
- Daigo Natsuhara
- Department of Materials Process Engineering, Graduate School of Engineering, Nagoya University Nagoya Aichi 464-8603 Japan
| | - Yuka Kiba
- Faculty of Pharmacy and Pharmaceutical Sciences, Josai University Sakado Saitama 350-0295 Japan
| | - Ryogo Saito
- Department of Mechanical Engineering, Toyohashi University of Technology Toyohashi Aichi 441-8580 Japan
| | - Shunya Okamoto
- Department of Mechanical Engineering, Toyohashi University of Technology Toyohashi Aichi 441-8580 Japan
| | - Moeto Nagai
- Department of Mechanical Engineering, Toyohashi University of Technology Toyohashi Aichi 441-8580 Japan
- Institute for Research on Next-generation Semiconductor and Sensing Science (IRES2), Toyohashi University of Technology Aichi 441-8580 Japan
| | - Yusuke Yamauchi
- Department of Materials Process Engineering, Graduate School of Engineering, Nagoya University Nagoya Aichi 464-8603 Japan
- Australian Institute for Bioengineering and Nanotechnology (AIBN), The University of Queensland St. Lucia QLD 4072 Australia
| | - Masashi Kitamura
- Faculty of Pharmacy and Pharmaceutical Sciences, Josai University Sakado Saitama 350-0295 Japan
| | - Takayuki Shibata
- Department of Mechanical Engineering, Toyohashi University of Technology Toyohashi Aichi 441-8580 Japan
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Panich W, Jaruboonyakorn P, Raksaman A, Tejangkura T, Chontananarth T. Development and utilization of a visual loop-mediated isothermal amplification coupled with a lateral flow dipstick (LAMP-LFD) assay for rapid detection of Echinostomatidae metacercaria in edible snail samples. Int J Food Microbiol 2024; 418:110732. [PMID: 38728973 DOI: 10.1016/j.ijfoodmicro.2024.110732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Revised: 04/29/2024] [Accepted: 05/01/2024] [Indexed: 05/12/2024]
Abstract
Trematodes belonging to the family Echinostomatidae are food-borne parasites which cause echinostomiasis in animals and humans. This is a global public health issue, particularly in East and Southeast Asia. A method to detect the infective stage of Echinostomatidae species is required to prevent transmission to humans. In this study, a loop-mediated isothermal amplification coupled with a lateral flow dipstick (LAMP-LFD) assay was developed for visual detection of the metacercarial stage in edible snails of the genus Filopaludina from local markets in Thailand. The LAMP-LFD method can be performed within 70 min at a consistent temperature of 66 °C, and the results can be interpreted with the naked eye. The detection limits of the assay using Echinostoma mekongi, E. macrorchis, E. miyagawai and Hypoderaeum conoideum genomic DNA were equal between the four species at 50 pg/μL. A specificity evaluation demonstrated that the LAMP-LFD assay had no cross-reaction with another parasite (Thapariella species) or with the snail host species (Filopaludina martensi martensi, F. sumatrensis speciosa, and F. s. polygramma). Clinical test assessments were compared to microscopic examination in 110 edible snail samples. The clinical sensitivity and specificity of the tests were 84.62 % and 100 %, respectively, with a strong level of agreement based on the kappa statistic and the results of both methods were not significantly different (p > 0.05) per McNemar's test. The test successfully developed in this study may be useful for the detection of the metacercarial stage in edible snails for epidemiological investigations, control, surveillance, and to prevent future echinostomiasis health issues.
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Affiliation(s)
- Wasin Panich
- Applied Parasitology Research Laboratory, Department of Biology, Faculty of Science, Srinakharinwirot University, Bangkok 10110, Thailand
| | - Phonkawin Jaruboonyakorn
- Applied Parasitology Research Laboratory, Department of Biology, Faculty of Science, Srinakharinwirot University, Bangkok 10110, Thailand
| | - Awika Raksaman
- Applied Parasitology Research Laboratory, Department of Biology, Faculty of Science, Srinakharinwirot University, Bangkok 10110, Thailand
| | - Thanawan Tejangkura
- Applied Parasitology Research Laboratory, Department of Biology, Faculty of Science, Srinakharinwirot University, Bangkok 10110, Thailand; Research and Innovation Unit for Diagnosis of Medical and Veterinary Important Parasites, Faculty of Science, Srinakharinwirot University, Bangkok 10110, Thailand
| | - Thapana Chontananarth
- Applied Parasitology Research Laboratory, Department of Biology, Faculty of Science, Srinakharinwirot University, Bangkok 10110, Thailand; Research and Innovation Unit for Diagnosis of Medical and Veterinary Important Parasites, Faculty of Science, Srinakharinwirot University, Bangkok 10110, Thailand.
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Maciel C, Silva NFD, Teixeira P, Magalhães JMCS. Development of a Novel Phagomagnetic-Assisted Isothermal DNA Amplification System for Endpoint Electrochemical Detection of Listeria monocytogenes. BIOSENSORS 2023; 13:bios13040464. [PMID: 37185539 PMCID: PMC10136355 DOI: 10.3390/bios13040464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 03/27/2023] [Accepted: 03/29/2023] [Indexed: 05/17/2023]
Abstract
The hitherto implemented Listeria monocytogenes detection techniques are cumbersome or require expensive non-portable instrumentation, hindering their transposition into on-time surveillance systems. The current work proposes a novel integrated system resorting to loop-mediated isothermal amplification (LAMP), assisted by a bacteriophage P100-magnetic platform, coupled to an endpoint electrochemical technique, towards L. monocytogenes expeditious detection. Molybdophosphate-based optimization of the bacterial phagomagnetic separation protocol allowed the determination of the optimal parameters for its execution (pH 7, 25 °C, 32 µg of magnetic particles; 60.6% of specific capture efficiency). The novel LAMP method targeting prfA was highly specific, accomplishing 100% inclusivity (for 61 L. monocytogenes strains) and 100% exclusivity (towards 42 non-target Gram-positive and Gram-negative bacteria). As a proof-of-concept, the developed scheme was successfully validated in pasteurized milk spiked with L. monocytogenes. The phagomagnetic-based approach succeeded in the selective bacterial capture and ensuing lysis, triggering Listeria DNA leakage, which was efficiently LAMP amplified. Methylene blue-based electrochemical detection of LAMP amplicons was accomplished in 20 min with remarkable analytical sensitivity (1 CFU mL-1). Hence, the combined system presented an outstanding performance and robustness, providing a 2.5 h-swift, portable, cost-efficient detection scheme for decentralized on-field application.
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Affiliation(s)
- Cláudia Maciel
- Laboratório Associado, Escola Superior de Biotecnologia, CBQF-Centro de Biotecnologia e Química Fina, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Nádia F D Silva
- REQUIMTE/LAQV, Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, 4200-465 Porto, Portugal
| | - Paula Teixeira
- Laboratório Associado, Escola Superior de Biotecnologia, CBQF-Centro de Biotecnologia e Química Fina, Universidade Católica Portuguesa, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Júlia M C S Magalhães
- REQUIMTE/LAQV, Departamento de Engenharia Química, Faculdade de Engenharia, Universidade do Porto, 4200-465 Porto, Portugal
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Srisawat W, Saengthongpinit C, Nuchchanart W. Development of loop-mediated isothermal amplification-lateral flow dipstick as a rapid screening test for detecting Listeria monocytogenes in frozen food products using a specific region on the ferrous iron transport protein B gene. Vet World 2022; 15:590-601. [PMID: 35497940 PMCID: PMC9047130 DOI: 10.14202/vetworld.2022.590-601] [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: 10/05/2021] [Accepted: 01/24/2022] [Indexed: 11/16/2022] Open
Abstract
Background and Aim: Listeria monocytogenes is a critical foodborne pathogen that infects pregnant females and their newborns and older adults and individuals with comorbidities. It contaminates fresh vegetables, fruits, ready-to-eat foods, and frozen food products consumed by individuals. The culture conventional detection methods for L. monocytogenes are time-consuming, taking 4 days. This study aimed to describe the development and comparison of loop-mediated isothermal amplification (LAMP)- lateral flow dipstick (LFD), LAMP assay to PCR, and conventional culture for detecting L. monocytogenes in frozen food products.
Materials and Methods: Five LAMP primer sets, including F3, B3, forward inner primer, and backward inner primer, were designed from a specific region on ferrous iron transport protein B gene (feoB gene) to amplify LAMP products. The DNA probe was created, and the detection limit was determined in pure culture and purified DNA, as well as the detection in 20 frozen food product samples.
Results: The LMfeoB4 LAMP primer sets and DNA probe were LAMP products amplified at 60°C for 50 min. The specificity of the assay revealed no cross-reactivity with other pathogenic bacteria. The limit of detection (LOD) of the LAMP-LFD and LAMP assays using purified genomic DNA was 219 fg/μL both in LAMP and LAMP-LFD assays. The LOD of LAMP and LAMP-LFD assays in pure culture was 4.3×102 colony-forming unit (CFU)/mL and 43 CFU/mL, respectively. The LOD of the LAMP-LFD assay using artificially inoculated chicken in frozen food samples with pre-enrichment was 3.2×102 CFU/mL. The LAMP-LFD was also more sensitive than the LAMP assay and polymerase chain reaction. Finally, LAMP-LFD revealed no false positives in any of the 20 frozen food product samples.
Conclusion: LAMP-LFD assay using a specific region on the feoB gene to detect L. monocytogenes was highly specific, sensitive, faster, and convenient, making it a valuable tool for the monitoring and rapid screening of L. monocytogenes in frozen food products. This technique is applicable to the development of detection technologies for other pathogens in food products.
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Affiliation(s)
- Wimvipa Srisawat
- Department of Animal Science, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Nakhon Pathom 73140, Thailand
| | - Chalermkiat Saengthongpinit
- Department of Veterinary Public Health, Faculty of Veterinary Medicine, Kasetsart University, Nakhon Pathom 73140, Thailand
| | - Wirawan Nuchchanart
- Department of Animal Science, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Nakhon Pathom 73140, Thailand; Center for Agricultural Biotechnology, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand; Center of Excellence on Agricultural Biotechnology, Bangkok 10900, Thailand
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Development of Loop-Mediated Isothermal Amplification Combined with Lateral Flow Dipstick Assay for a Rapid and Sensitive Detection of Cystic Echinococcosis in Livestock in Kenya. J Trop Med 2022; 2022:4928009. [PMID: 35265138 PMCID: PMC8898851 DOI: 10.1155/2022/4928009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 01/24/2022] [Accepted: 01/31/2022] [Indexed: 11/18/2022] Open
Abstract
Background Cystic echinococcosis is a zoonotic disease caused by the metacestode stage of Echinococcus granulosus and occurs worldwide, causing considerable economic losses and public health problems. The currently available methods for the diagnosis of animal hydatidosis are time-consuming and require well-equipped laboratories which make them incompatible with testing in resource-poor settings. This study developed and evaluated a rapid, more sensitive, and specific loop-mediated isothermal amplification combined with a lateral flow dipstick assay for the rapid and sensitive detection of cystic echinococcosis. Results In this study, a specific primer set and FITC-labeled probe targeting the conserved region of the NADH-1 gene were designed. The LAMP reaction was performed at 60°C for 40 minutes, and the amplification products were successfully visualized by LFD strips. The analytical sensitivity of LAMP-LFD was determined using 10-fold serial dilutions of E. granulosus DNA. The minimal concentration detected was 10 fg/μl, and no cross-reactivity was observed with DNA extracted from Taenia solium, Taenia saginata, and Fasciola hepatica. The ability of the developed LAMP-LFD assay to detect cystic echinococcosis was further evaluated with 62 cyst samples from slaughtered cattle in Juja Abattoir, Kiambu County, Kenya. The LAMP-LFD was able to detect 59/62 (95.2%, 95% CI 0.87–0.98) as positive samples of E. granulosus compared to 53/62 (85.5%, 95% CI 0.75–0.92) by nested PCR assay. Conclusion Our results indicated that the developed LAMP-LFD technique was more sensitive than the nested PCR assay, rapid, and easy to perform with a simple visual detection of products. Therefore, it could be an important point-of-care diagnostic tool for cystic echinococcosis.
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Sohrabi H, Majidi MR, Khaki P, Jahanban-Esfahlan A, de la Guardia M, Mokhtarzadeh A. State of the art: Lateral flow assays toward the point-of-care foodborne pathogenic bacteria detection in food samples. Compr Rev Food Sci Food Saf 2022; 21:1868-1912. [PMID: 35194932 DOI: 10.1111/1541-4337.12913] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 12/18/2021] [Accepted: 12/23/2021] [Indexed: 12/24/2022]
Abstract
Diverse chemicals and some physical phenomena recently introduced in nanotechnology have enabled scientists to develop useful devices in the field of food sciences. Concerning such developments, detecting foodborne pathogenic bacteria is now an important issue. These kinds of bacteria species have demonstrated severe health effects after consuming foods and high mortality related to acute cases. The most leading path of intoxication and infection has been through food matrices. Hence, quick recognition of foodborne bacteria agents at low concentrations has been required in current diagnostics. Lateral flow assays (LFAs) are one of the urgent and prevalently applied quick recognition methods that have been settled for recognizing diverse types of analytes. Thus, the present review has stressed on latest developments in LFAs-based platforms to detect various foodborne pathogenic bacteria such as Salmonella, Listeria, Escherichia coli, Brucella, Shigella, Staphylococcus aureus, Clostridium botulinum, and Vibrio cholera. Proper prominence has been given on exactly how the labels, detection elements, or procedures have affected recent developments in the evaluation of diverse bacteria using LFAs. Additionally, the modifications in assays specificity and sensitivity consistent with applied food processing techniques have been discussed. Finally, a conclusion has been drawn for highlighting the main challenges confronted through this method and offered a view and insight of thoughts for its further development in the future.
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Affiliation(s)
- Hessamaddin Sohrabi
- Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran
| | - Mir Reza Majidi
- Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran
| | - Pegah Khaki
- Department of Analytical Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran
| | - Ali Jahanban-Esfahlan
- Biotechnology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Biology, Faculty of Fundamental Sciences, University College of Nabi Akram (UCNA), Tabriz, Iran
| | | | - Ahad Mokhtarzadeh
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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Busch A, Becker A, Schotte U, Plötz M, Abdulmawjood A. Mpl-Gene-Based Loop-Mediated Isothermal Amplification Assay for Specific and Rapid Detection of Listeria monocytogenes in Various Food Samples. Foodborne Pathog Dis 2022; 19:463-472. [PMID: 35099299 DOI: 10.1089/fpd.2021.0080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Listeria monocytogenes represents a high risk in food and can trigger potentially fatal listeriosis. The objective of this study was to detect L. monocytogenes in food using the LAMP method in a fast, specific, sensitive manner and thus to preventively test food for the presence of the target species. The reaction was performed and established using the portable real-time fluorometer Genie® II (OptiGene Ltd., Horsham, United Kingdom). In this new assay, six LAMP primers targeted the mpl-gene sequence of L. monocytogenes. A total of 148 different isolates, including 105 L. monocytogenes and 43 non-L. monocytogenes strains, were tested. Analytical sensitivity was determined based on different DNA- and cell concentrations. The detection limit with a detection rate of 100% was 5 pg of DNA or 275 colony-forming units (CFU) per reaction. Artificially contaminated minced beef and grated mozzarella were also tested. The assay was 100% successful to detect an initial bacterial contamination of 0.4-4 CFU g-1 food after 24 h enrichment in half-Fraser broth. Finally, natively contaminated samples were tested in comparison to the microbiological reference method and real-time polymerase chain reaction. Native sample testing revealed 100% consistent findings between LAMP and the standard culture method after first enrichment for 24 h. In addition, a rapid colony-confirmation method was established that enabled reliable identification of L. monocytogenes isolates on different selective culture media using a simplified DNA extraction by boiling. This study showed that the developed assay was able to determine whether a food is safe with respect to the food-safety criteria of 100 CFU per gram, according to standards of the European Union, for L. monocytogenes and provided faster results than the cultural reference method.
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Affiliation(s)
- Annemarie Busch
- Institute of Food Quality and Food Safety, University of Veterinary Medicine Hannover, Hannover, Germany
| | - André Becker
- Institute of Food Quality and Food Safety, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Ulrich Schotte
- Department A (Veterinary Medicine), Central Institute of the Bundeswehr Medical Service Kiel, Kronshagen, Germany
| | - Madeleine Plötz
- Institute of Food Quality and Food Safety, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Amir Abdulmawjood
- Institute of Food Quality and Food Safety, University of Veterinary Medicine Hannover, Hannover, Germany
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In-Situ Monitoring of Real-Time Loop-Mediated Isothermal Amplification with QCM: Detecting Listeria monocytogenes. BIOSENSORS-BASEL 2021; 11:bios11090308. [PMID: 34562899 PMCID: PMC8470657 DOI: 10.3390/bios11090308] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 08/20/2021] [Accepted: 08/25/2021] [Indexed: 12/03/2022]
Abstract
Functionalized DNA sequences are promising sensing elements to combine with transducers for bio-sensing specific target microbes. As an application example, this paper demonstrates in situ detection of loop-mediated isothermal amplification products by hybridizing them with thiolated-ssDNA covalently anchored on the electrodes of a quartz crystal microbalance (QCM). Such hybridization leads to a frequency signal, which is suitable for monitoring real-time LAMP amplification based on mass-sensing: it detects interactions between the complementary nucleobases of LAMP products in solution and the thiolated-ssDNA probe sequence on the gold surface. Target DNA LAMP products cause irreversible frequency shifts on the QCM surfaces during hybridization in the kHz range, which result from both changes in mass and charge on the electrode surface. In order to confirm the LAMP assay working in the QCM sensing system at elevated temperature, the sky blue of positive LAMP products solution was achieved by using the Hydroxy Naphthol Blue (HNB) and agarose gel electrophoresis. Since on-QCM sensing of DNA hybridization leads to irreversible sensor responses, this work shows characterization by X-ray photoelectron spectroscopy (XPS) core spectra of S2p, N1s, Mg1s, P2p and C1s. XPS results confirmed that indeed both DNA and by-products of LAMP attached to the surface. Listeria monocytogenes DNA served to study in-situ detection of amplified LAMP products on DNA-functionalized surfaces.
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Antibody- and nucleic acid-based lateral flow immunoassay for Listeria monocytogenes detection. Anal Bioanal Chem 2021; 413:4161-4180. [PMID: 34041576 DOI: 10.1007/s00216-021-03402-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 04/30/2021] [Accepted: 05/10/2021] [Indexed: 01/02/2023]
Abstract
Listeria monocytogenes is an invasive opportunistic foodborne pathogen and its routine surveillance is critical for protecting the food supply and public health. The traditional detection methods are time-consuming and require trained personnel. Lateral flow immunoassay (LFIA), on the other hand, is an easy-to-perform, rapid point-of-care test and has been widely used as an inexpensive surveillance tool. In recent times, nucleic acid-based lateral flow immunoassays (NALFIA) are also developed to improve sensitivity and specificity. A significant improvement in lateral flow-based assays has been reported in recent years, especially the ligands (antibodies, nucleic acids, aptamers, bacteriophage), labeling molecules, and overall assay configurations to improve detection sensitivity, specificity, and automated interpretation of results. In most commercial applications, LFIA has been used with enriched food/environmental samples to ensure detection of live cells thus prolonging the assay time to 24-48 h; however, with the recent improvement in LFIA sensitivity, results can be obtained in less than 8 h with shortened and improved enrichment practices. Incorporation of surface-enhanced Raman spectroscopy and/or immunomagnetic separation could significantly improve LFIA sensitivity for near-real-time point-of-care detection of L. monocytogenes for food safety and public health applications.
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Deng Y, Liu Y, Jiang Z, Wang J, Zhang Q, Qian Y, Yuan Y, Zhou X, Fan G, Li Y. A multiplex loop-mediated isothermal amplification assay for rapid detection of Bacillus cereus and Staphylococcus aureus . Biosci Trends 2019; 13:510-515. [DOI: 10.5582/bst.2019.01267] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Yanglong Deng
- School of Food and Bioengineering, Xihua University, Chengdu, Sichuan, China
| | - Yanquan Liu
- College of Life and Geographic Sciences, Kashi University, Kashi, Xinjiang, China
| | - Zubin Jiang
- Culinary school, Sichuan Tourism University, Chengdu, Sichuan, China
| | - Jingxin Wang
- School of Materials and Environmental Protection, Chengdu Textile College, Chengdu, Sichuan, China
| | - Qing Zhang
- School of Food and Bioengineering, Xihua University, Chengdu, Sichuan, China
| | - Yeqian Qian
- School of Food and Bioengineering, Xihua University, Chengdu, Sichuan, China
| | - Yuan Yuan
- School of Food and Bioengineering, Xihua University, Chengdu, Sichuan, China
| | - Xiangyu Zhou
- School of Food and Bioengineering, Xihua University, Chengdu, Sichuan, China
| | - Guiling Fan
- School of Food and Bioengineering, Xihua University, Chengdu, Sichuan, China
| | - Yufeng Li
- School of Food and Bioengineering, Xihua University, Chengdu, Sichuan, China
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Yushina Y, Makhova A, Zayko E, Bataeva D. Loop-mediated isothermal amplification (LAMP) for rapid detection of L. monocytogenes in meat. POTRAVINARSTVO 2019. [DOI: 10.5219/1165] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
There is a continued need to develop improved rapid methods for detection of foodborne pathogens. Rapid and sensitive methods for enumeration of Listeria monocytogenes are important for microbiological food safety testing purpose. The aim of this project was to evaluate a commercial loop-mediated isothermal amplification (LAMP) based system with bioluminescence, named as 3M™ Molecular Detection Assay (MDA), was validated for the detection of L. monocytogenes in food products with a standard GOST 32031-2012 method as reference. The results of this study revealed that a commercial LAMP-based method performed equally effective compared with method, showing from 94% to 100% specificity and sensitivity, respectively. The LAMP-based method was shown to be rapid and reliable detection technique for L. monocytogenes present at low numbers (10 CFU.g-1) on raw meat and meat products and can be applicable in meat industry. Thus, compared with the microbiological method based GOST 32031-2012, the LAMP assay is a relatively rapid and highly sensitive method for detecting L. monocytogenes and will facilitate the surveillance for contamination of L. monocytogenes in food. The 3M MDS result and culture-based detection (GOST 32031-2012) did not differ significantly (p >0.05) regarding the number of positive samples.
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Ledlod S, Bunroddith K, Areekit S, Santiwatanakul S, Chansiri K. Development of a duplex lateral flow dipstick test for the detection and differentiation of Listeria spp. and Listeria monocytogenes in meat products based on loop-mediated isothermal amplification. J Chromatogr B Analyt Technol Biomed Life Sci 2019; 1139:121834. [PMID: 31812649 DOI: 10.1016/j.jchromb.2019.121834] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 10/13/2019] [Accepted: 10/16/2019] [Indexed: 12/31/2022]
Abstract
Listeria spp. are a group of gram-positive bacteria consisting of 20 species. Among them, Listeria monocytogenes is one of the major species that infects humans since it contaminates raw fruits, vegetables, and many others food products. The conventional methods for the detection of Listeria spp. and L. monocytogenes are time-consuming, taking 5-7 days. Herein, a duplex lateral flow dipstick (DLFD) test combined with loop-mediated isothermal amplification (LAMP) was developed for the identification of Listeria spp. and L. monocytogenes within approximately 45 min with the optimized LAMP reaction times at 63 °C. Under the optimized conditions, the method detection limits (MDL) with reference to genomic DNA and pure culture were 900 femtograms (fg) and 20 cfu/mL, respectively. The LAMP-DLFD showed no cross-reactivity with eighteen - other pathogenic bacteria such as Salmonella spp., Staphylococcus aureus, Escherichia coli, Campylobacter coli, C. jejuni, Enterococcus faecalis, Vibrio cholerae, V. parahaemolyticus, Pseudomonas aeruginosa, Shigella dysenteriae, S. flexneri, Bacillus cereus, Lactobacillus acidophilus, L. casei and Pediococcus pentosaceus. Among 100 samples of food products, LAMP-DLFD demonstrated 100% accuracy when compared to other standard detection methods, such as ISO11290-1, enzyme-linked fluorescent assay (ELFA) technology (VIDAS) and PCR. In conclusion, LAMP-DLFD proved to be highly specific and sensitive assays for screening detection of Listeria spp. and L. monocytogenes.
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Affiliation(s)
- Sudarat Ledlod
- Department of Biochemistry, Faculty of Medicine, Srinakharinwirot University, Sukhumvit 23, Bangkok 10110, Thailand; CPF Laboratory, CPF Food and Beverage Co., LTD., 30/3 M 3, Suwintawong Rd, Lumpackchee, Nongjok, Bangkok 10530, Thailand; CPF Research and Development Center Co., LTD., 359 M.4, T. Lamsai, Amphoe Wang Noi, Phranakhon Sri Ayutthaya 13170, Thailand
| | - Kespunyavee Bunroddith
- Center of Excellence in Biosensors, Srinakharinwirot University, 222 M.1, Panyananthaphikkhu Chonprathan Medical Center, Tiwanon Road, Bang-talat, Pak Kret, Nonthaburi 11120, Thailand
| | - Supatra Areekit
- Innovative Learning Center, Srinakharinwirot University, Sukhumvit 23, Bangkok 10110, Thailand; Center of Excellence in Biosensors, Srinakharinwirot University, 222 M.1, Panyananthaphikkhu Chonprathan Medical Center, Tiwanon Road, Bang-talat, Pak Kret, Nonthaburi 11120, Thailand
| | - Somchai Santiwatanakul
- Department of Pathology, Faculty of Medicine, Srinakharinwirot University, Sukhumvit 23, Bangkok 10110, Thailand; Center of Excellence in Biosensors, Srinakharinwirot University, 222 M.1, Panyananthaphikkhu Chonprathan Medical Center, Tiwanon Road, Bang-talat, Pak Kret, Nonthaburi 11120, Thailand
| | - Kosum Chansiri
- Department of Biochemistry, Faculty of Medicine, Srinakharinwirot University, Sukhumvit 23, Bangkok 10110, Thailand; Center of Excellence in Biosensors, Srinakharinwirot University, 222 M.1, Panyananthaphikkhu Chonprathan Medical Center, Tiwanon Road, Bang-talat, Pak Kret, Nonthaburi 11120, Thailand.
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Loop-mediated isothermal amplification-lateral-flow dipstick (LAMP-LFD) to detect Mycoplasma ovipneumoniae. World J Microbiol Biotechnol 2019; 35:31. [PMID: 30701329 PMCID: PMC6353813 DOI: 10.1007/s11274-019-2601-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 01/18/2019] [Indexed: 11/17/2022]
Abstract
In order to establish a rapid detection method for Mycoplasma ovipneumoniae, this study used the loop-mediated isothermal amplification (LAMP) technique to carry out nucleic acid amplification and chromatographic visualization via a lateral flow dipstick (LFD) assay. The M. ovipneumoniae elongation factor TU gene (EF-TU) was detected using a set of specific primers designed for the EF-TU gene, and the EF-TU FIP was detected by biotin labeling, which was used in the LAMP amplification reaction. The digoxin-labeled probe specifically hybridized with LAMP products, which were visually detected by LFD. Here, we established the M. ovipneumoniae LAMP-LFD rapid detection method and tested the specificity, sensitivity, and clinical application of this method. Results showed that the optimized LAMP performed at 60 °C for 60 min, and LFD can specifically and visually detect M. ovipneumoniae with a minimum detectable concentration at 1.0 × 102 CFU/mL. The sensitivity of LAMP-LFD was 1000 times that of the conventional PCR detection methods, and the clinical lung tissue detection rate was 86% of 50 suspected sheep infected with M. ovipneumoniae. In conclusion, LAMP-LFD was established in this study to detect M. ovipneumoniae, a method that was highly specific, sensitive, and easy to operate, and provides a new method for the prevention and diagnosis of M. ovipneumoniae infection.
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Rapid Detection Device for Salmonella typhi in Milk, Juice, Water and Calf Serum. Indian J Microbiol 2018; 58:381-392. [PMID: 30013283 DOI: 10.1007/s12088-018-0730-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Accepted: 04/20/2018] [Indexed: 10/17/2022] Open
Abstract
A limit of detection of 200 CFU/mL of Salmonella typhi spiked in various sample matrices were achieved in 30 min. The sample matrices were raw/unprocessed milk, commercially available milk, juice from packed bottles, fresh juice from carts, potable water, turbid water and calf serum. The complete protocol comprised of three steps: (a) cell lysis (b) nucleic acid amplification and (c) an in situ optical detection. The cell lysis was carried out using a simple heating based protocol, while the loop-mediated isothermal amplification of DNA was carried out by an in-house designed and fabricated system. The developed system consists of an aluminum block fitted with two cartridge heaters along with a thermocouple. The system was coupled to a light source and spectrometer for a simultaneous in situ detection. Primers specific for STY2879 gene were used to amplify the nucleic acid sequence, isolated from S. typhi cells. The protocol involves 15 min of cell lysis and DNA isolation followed by 15 min for isothermal amplification and simultaneous detection. No cross-reactivity of the primers were observed at 106 CFU/mL of Escherichia coli, Vibrio cholerae, Salmonella typhimurium, Salmonella paratyphi A, Pseudomonas aeruginosa, Bacillus cereus, Lysteria monocytogenes, Clostridium botulinum, Staphylococcus aureus and Salmonella havana. In addition, the system was able to detect S. typhi of 200 CFU/mL in a concoction of 106 CFU/mL of E. coli, 106 CFU/mL of V. cholerae, and 106 CFU/mL of hepatocyte-derived cellular carcinoma HUH7 cells. The proposed rapid diagnostic system shows a promising future in the field of food and medical diagnostics.
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Wachiralurpan S, Sriyapai T, Areekit S, Sriyapai P, Augkarawaritsawong S, Santiwatanakul S, Chansiri K. Rapid Colorimetric Assay for Detection of Listeria monocytogenes in Food Samples Using LAMP Formation of DNA Concatemers and Gold Nanoparticle-DNA Probe Complex. Front Chem 2018; 6:90. [PMID: 29670874 PMCID: PMC5893898 DOI: 10.3389/fchem.2018.00090] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2018] [Accepted: 03/14/2018] [Indexed: 11/17/2022] Open
Abstract
Listeria monocytogenes is a major foodborne pathogen of global health concern. Herein, the rapid diagnosis of L. monocytogenes has been achieved using loop-mediated isothermal amplification (LAMP) based on the phosphatidylcholine-phospholipase C gene (plcB). Colorimetric detection was then performed through the formation of DNA concatemers and a gold nanoparticle/DNA probe complex (GNP/DNA probe). The overall detection process was accomplished within approximately 1 h with no need for complicated equipment. The limits of detection for L. monocytogenes in the forms of purified genomic DNA and pure culture were 800 fg and 2.82 CFU mL−1, respectively. No cross reactions were observed from closely related bacteria species. The LAMP-GNP/DNA probe assay was applied to the detection of 200 raw chicken meat samples and compared to routine standard methods. The data revealed that the specificity, sensitivity, and accuracy were 100, 90.20, and 97.50%, respectively. The present assay was 100% in conformity with LAMP-agarose gel electrophoresis assay. Five samples that were negative by both assays appeared to have the pathogen at below the level of detection. The assay can be applied as a rapid direct screening method for L. monocytogenes.
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Affiliation(s)
- Sirirat Wachiralurpan
- Department of Biochemistry, Faculty of Medicine, Srinakharinwirot University, Bangkok, Thailand
| | - Thayat Sriyapai
- Faculty of Environmental Culture and Ecotourism, Srinakharinwirot University, Bangkok, Thailand
| | - Supatra Areekit
- Innovative Learning Center, Srinakharinwirot University, Bangkok, Thailand
| | - Pichapak Sriyapai
- Department of Microbiology, Faculty of Science, Srinakharinwirot University, Bangkok, Thailand
| | | | - Somchai Santiwatanakul
- Department of Pathology, Faculty of Medicine, Srinakharinwirot University, Bangkok, Thailand
| | - Kosum Chansiri
- Department of Biochemistry, Faculty of Medicine, Srinakharinwirot University, Bangkok, Thailand
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