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Zhuang L, Gong J, Zhang P, Zhang D, Zhao Y, Yang J, Liu G, Zhang Y, Shen Q. Research progress of loop-mediated isothermal amplification in the detection of Salmonella for food safety applications. DISCOVER NANO 2024; 19:124. [PMID: 39105889 PMCID: PMC11303641 DOI: 10.1186/s11671-024-04075-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Accepted: 07/29/2024] [Indexed: 08/07/2024]
Abstract
Salmonella, the prevailing zoonotic pathogen within the Enterobacteriaceae family, holds the foremost position in global bacterial poisoning incidents, thereby signifying its paramount importance in public health. Consequently, the imperative for expeditious and uncomplicated detection techniques for Salmonella in food is underscored. After more than two decades of development, loop-mediated isothermal amplification (LAMP) has emerged as a potent adjunct to the polymerase chain reaction, demonstrating significant advantages in the realm of isothermal amplification. Its growing prominence is evident in the increasing number of reports on its application in the rapid detection of Salmonella. This paper provides a systematic exposition of the technical principles and characteristics of LAMP, along with an overview of the research progress made in the rapid detection of Salmonella using LAMP and its derivatives. Additionally, the target genes reported in various levels, including Salmonella genus, species, serogroup, and serotype, are summarized, aiming to offer a valuable reference for the advancement of LAMP application in Salmonella detection. Finally, we look forward to the development direction of LAMP and expect more competitive methods to provide strong support for food safety applications.
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Affiliation(s)
- Linlin Zhuang
- School of Animal Husbandry and Veterinary Medicine, Jiangsu Vocational College of Agriculture and Forestry, Jurong, 212400, People's Republic of China
- State Key Laboratory of Digital Medical Engineering, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering and Basic Medicine Research and Innovation Center of Ministry of Education, Zhongda Hospital, Southeast University, Nanjing, 211102, People's Republic of China
| | - Jiansen Gong
- Poultry Institute, Chinese Academy of Agricultural Sciences, Yangzhou, 225125, People's Republic of China
| | - Ping Zhang
- Poultry Institute, Chinese Academy of Agricultural Sciences, Yangzhou, 225125, People's Republic of China
| | - Di Zhang
- Poultry Institute, Chinese Academy of Agricultural Sciences, Yangzhou, 225125, People's Republic of China
| | - Ying Zhao
- State Key Laboratory of Digital Medical Engineering, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering and Basic Medicine Research and Innovation Center of Ministry of Education, Zhongda Hospital, Southeast University, Nanjing, 211102, People's Republic of China
| | - Jianbo Yang
- School of Animal Husbandry and Veterinary Medicine, Jiangsu Vocational College of Agriculture and Forestry, Jurong, 212400, People's Republic of China
| | - Guofang Liu
- School of Animal Husbandry and Veterinary Medicine, Jiangsu Vocational College of Agriculture and Forestry, Jurong, 212400, People's Republic of China
| | - Yu Zhang
- State Key Laboratory of Digital Medical Engineering, Jiangsu Key Laboratory for Biomaterials and Devices, School of Biological Science and Medical Engineering and Basic Medicine Research and Innovation Center of Ministry of Education, Zhongda Hospital, Southeast University, Nanjing, 211102, People's Republic of China.
| | - Qiuping Shen
- School of Animal Husbandry and Veterinary Medicine, Jiangsu Vocational College of Agriculture and Forestry, Jurong, 212400, People's Republic of China.
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da Silva EC, de Oliveira CD, Ribeiro LFM, Casas MRT, Pereira JG, Possebon FS, Junior JPA. Salmonella detection with LAMP and qPCR and identification of serovars of interest by multiplex qPCR in poultry carcasses. Braz J Microbiol 2023; 54:2173-2182. [PMID: 37582950 PMCID: PMC10484893 DOI: 10.1007/s42770-023-01095-y] [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: 02/10/2023] [Accepted: 08/03/2023] [Indexed: 08/17/2023] Open
Abstract
Salmonella is present in the poultry production chain and is a major challenge in terms of food safety and animal health. The early Salmonella detection is one of the main tools to control and prevent the transmission of this pathogen. Microbiological isolation and serotyping to identify and differentiate Salmonella serovars are laborious processes, time-consuming, and expensive. Therefore, molecular diagnostic methods can be rapid and efficient alternatives to the detection of this pathogen. Thus, the aim herein was to standardize and evaluate the use of loop-mediated isothermal amplification (LAMP) in comparison with real-time PCR (qPCR) for detection of Salmonella associated with a multiplex qPCR for simultaneous identification and differentiation of S. Enteritidis, S. Typhimurium, S. Pullorum, and S. Gallinarum. The LAMP, qPCR, and multiplex qPCR assays were comparable in specificity. The three techniques were evaluated for specificity for 16 different serovars of Salmonella and for 37 strains of the serovars of interest. The limit of detection and the efficiency of the LAMP, qPCR, and multiplex qPCR reactions were determined. The techniques were applied to 33 samples of chicken carcasses and compared to the results of conventional microbiology for validation. As results, LAMP was specific in the detection of different Salmonella serovars but presented lower limit of detection ranging from 101 to 104 CFU/reaction. In comparison, qPCR could detect less cells (100 to 102 CFU/reaction), reaching equal specificity and better repeatability in the assays. The qPCR multiplexing for identification of the different serovars also showed good specificity, with the detection threshold between entre 101 and 102 CFU/reaction. The results obtained in the analyses on poultry carcasses suggested a correspondence between the results obtained in molecular methods and in conventional microbiology. Thus, the proposed assays are promising for the diagnosis of Salmonella in poultry carcasses, already proved to be faster and more efficient than conventional diagnostics techniques, being of great interest for poultry production, animal, and public health.
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Affiliation(s)
- Evelyn Cristine da Silva
- Institute for Biotechnology, São Paulo State University (UNESP), Tecomarias Avenue, Botucatu, SP, 18607-440, Brazil.
| | - Catarina Demarchi de Oliveira
- Department of Animal Production and Preventive Veterinary Medicine, School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Prof. Walter Maurício Correa St., SP, 18618-681, Botucatu, Brazil
| | - Lucas Franco Miranda Ribeiro
- Department of Animal Production and Preventive Veterinary Medicine, School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Prof. Walter Maurício Correa St., SP, 18618-681, Botucatu, Brazil
| | - Monique Ribeiro Tiba Casas
- Bacteriology Division, Adolfo Lutz Institute (IAL), Doutor Arnaldo Avenue, São Paulo, SP, 01246-000, Brazil
| | - Juliano Gonçalves Pereira
- Department of Animal Production and Preventive Veterinary Medicine, School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Prof. Walter Maurício Correa St., SP, 18618-681, Botucatu, Brazil
| | - Fábio Sossai Possebon
- Institute for Biotechnology, São Paulo State University (UNESP), Tecomarias Avenue, Botucatu, SP, 18607-440, Brazil
- Department of Animal Production and Preventive Veterinary Medicine, School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Prof. Walter Maurício Correa St., SP, 18618-681, Botucatu, Brazil
| | - João Pessoa Araújo Junior
- Institute for Biotechnology, São Paulo State University (UNESP), Tecomarias Avenue, Botucatu, SP, 18607-440, Brazil
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Liu W, Lu G, Wang Y, Chen Z, Gao Y, Yin Z, Wu Y, Lv X, Guo P, Zhao Y. A novel loop-mediated isothermal amplification-lateral flow dipstick method for Helicobacter pylori detection. Front Microbiol 2023; 14:1094600. [PMID: 37032891 PMCID: PMC10076779 DOI: 10.3389/fmicb.2023.1094600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 02/27/2023] [Indexed: 04/11/2023] Open
Abstract
Introduction To eradicate Helicobacter pylori (H. pylori) and reduce the risk of gastric cancer, a sensitive, specific, convenient, and simple detection method is needed. This study aimed to establish a novel loop-mediated isothermal amplification-lateral flow dipstick (LAMP-LFD) method for H. pylori detection. Methods LAMP primer design software was used to design primers for the conserved sites of the H. pylori ureB gene. UreB-FIP-labeled biotin was used for LAMP amplification, and FAM-labeled probes were specifically hybridized with LAMP amplification products, which were then detected by LFD. In addition, a clinical study was conducted to assess LAMP-LFD in 20 fecal samples. Results The results of the optimization indicated that H. pylori could be specifically detected by LFD without cross-reaction with other non-H. pylori bacteria when the LAMP was performed at 65°C for 60 min. The lower limit of the detection method was 102 copies/μL, which was 100 times the sensitivity of polymerase chain reaction (PCR). H. pylori-positive fecal samples were detected by LAMP-LFD in 13/20 patients. Discussion In conclusion, a new LAMP-LFD assay has been fully established and confirmed for H. pylori detection. The entire process can be completed in approximately 1.5 h, with the advantages of strong specificity, high sensitivity, and simple operation. This study provides a novel potential method for the detection of H. pylori in the clinical settings of primary hospitals and low-resource countries.
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Affiliation(s)
- Wenwen Liu
- Department of Clinical Laboratory Medicine, The First Affiliated Hospital of Shandong First Medical University and Shandong Provincial Qianfoshan Hospital, Shandong Medicine and Health Key Laboratory of Laboratory Medicine, Jinan, Shandong, China
| | - Gang Lu
- Department of Pathogen Biology, School of Clinical and Basic Medical Sciences, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
- Department of Clinical Microbiology Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
| | - Yu Wang
- Department of Pathogen Biology, School of Clinical and Basic Medical Sciences, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
- Department of Clinical Microbiology Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
| | - Zhenghong Chen
- Key Laboratory of Medical Microbiology and Parasitology, Department of Microbiology, Guizhou Medical University, Guiyang, China
| | - Yunyun Gao
- Department of Pathogen Biology, School of Clinical and Basic Medical Sciences, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Zhipeng Yin
- Department of Pathogen Biology, School of Clinical and Basic Medical Sciences, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Yi Wu
- Department of Pathogen Biology, School of Clinical and Basic Medical Sciences, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Xiaoqian Lv
- Department of Pathogen Biology, School of Clinical and Basic Medical Sciences, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
| | - Pengbo Guo
- Department of Pathogen Biology, School of Clinical and Basic Medical Sciences, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
- Department of Clinical Microbiology Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
- *Correspondence: Pengbo Guo
| | - Yinghui Zhao
- Department of Pathogen Biology, School of Clinical and Basic Medical Sciences, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong, China
- Department of Clinical Microbiology Laboratory, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, Shandong, China
- Yinghui Zhao
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Young SR, Domesle KJ, McDonald RC, Lozinak KA, Laksanalamai P, Harrell E, Thakur S, Kabera C, Strain EA, McDermott PF, Ge B. Toward the Adoption of Loop-Mediated Isothermal Amplification for Salmonella Screening at the National Antimicrobial Resistance Monitoring System's Retail Meat Sites. Foodborne Pathog Dis 2022; 19:758-766. [PMID: 36367550 PMCID: PMC9700350 DOI: 10.1089/fpd.2022.0047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The National Antimicrobial Resistance Monitoring System (NARMS) is a One Health program in the United States that collects data on antimicrobial resistance in enteric bacteria from humans, animals, and the environment. Salmonella is a major pathogen tracked by the NARMS retail meat arm but currently lacks a uniform screening method. We evaluated a loop-mediated isothermal amplification (LAMP) assay for the rapid screening of Salmonella from 69 NARMS retail meat and poultry samples. All samples were processed side by side for culture isolation using two protocols, one from NARMS and the other one described in the U.S. Food and Drug Administration's Bacteriological Analytical Manual (BAM). Overall, 10 (14.5%) samples screened positive by the Salmonella LAMP assay. Of those, six were culture-confirmed by the NARMS protocol and six by the BAM method with overlap on four samples. No Salmonella isolates were recovered from samples that screened negative with LAMP. These results suggested 100% sensitivity for LAMP in reference to culture. Antimicrobial susceptibility testing and whole-genome sequencing analysis confirmed identities of these isolates. Using the BAM protocol, all Salmonella isolates were recovered from samples undergoing Rappaport-Vassiliadis medium selective enrichment and presumptive colonies (n = 130) were dominated by Hafnia alvei (44.6%), Proteus mirabilis (22.3%), and Morganella morganii (9.9%) based on matrix-assisted laser desorption/ionization time-of-flight mass spectrometry. This method comparison study clearly demonstrated the benefit of a rapid, robust, and highly sensitive molecular screening method in streamlining the laboratory workflow. Fourteen NARMS retail meat sites further verified the performance of this assay using a portion of their routine samples, reporting an overall specificity of 98.8% and sensitivity of 90%. As of July 2022, the vast majority of NARMS retail meat sites have adopted the Salmonella LAMP assay for rapid screening of Salmonella in all samples.
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Affiliation(s)
- Shenia R. Young
- Division of Animal and Food Microbiology, Office of Research, Center for Veterinary Medicine, U.S. Food and Drug Administration, Laurel, Maryland, USA
| | - Kelly J. Domesle
- Division of Animal and Food Microbiology, Office of Research, Center for Veterinary Medicine, U.S. Food and Drug Administration, Laurel, Maryland, USA
| | - Ryan C. McDonald
- Division of Animal and Food Microbiology, Office of Research, Center for Veterinary Medicine, U.S. Food and Drug Administration, Laurel, Maryland, USA
| | | | | | - Erin Harrell
- College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
| | - Siddhartha Thakur
- College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
| | - Claudine Kabera
- Division of Animal and Food Microbiology, Office of Research, Center for Veterinary Medicine, U.S. Food and Drug Administration, Laurel, Maryland, USA
| | - Errol A. Strain
- Division of Animal and Food Microbiology, Office of Research, Center for Veterinary Medicine, U.S. Food and Drug Administration, Laurel, Maryland, USA
| | - Patrick F. McDermott
- Division of Animal and Food Microbiology, Office of Research, Center for Veterinary Medicine, U.S. Food and Drug Administration, Laurel, Maryland, USA
| | - Beilei Ge
- Division of Animal and Food Microbiology, Office of Research, Center for Veterinary Medicine, U.S. Food and Drug Administration, Laurel, Maryland, USA.,Address correspondence to: Beilei Ge, PhD, Division of Animal and Food Microbiology, Office of Research, Center for Veterinary Medicine, U.S. Food and Drug Administration, Laurel, MD 20708, USA
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Ghorashi MS, Pant SD, Ghorashi SA. Comparison of colourimetric loop-mediated isothermal amplification (LAMP), PCR and high-resolution melt curve analysis and culture based diagnostic assays in the detection of three salmonella serotypes in poultry. Avian Pathol 2022; 51:476-487. [PMID: 35833568 DOI: 10.1080/03079457.2022.2101916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
The accuracy of two molecular tests, PCR and loop-mediated isothermal amplification (LAMP) assay were compared with bacterial culture in detection of salmonella in poultry clinical samples. The icIR family transcriptional regulator gene was targeted and out of 56 clinical specimens, 20 poultry field isolates were found positive for salmonella. Along with human isolates, reference strains of three different serovars, Salmonella Enteritidis (S. Enteritidis), S. Typhimurium and S. Infantis, were also tested. Eight different but genetically closely related bacterial genera (Klebsiella, Pseudomonas, Enterobacter, Campylobacter, Staphylococcus, Streptococcus, Escherichia and Pasteurella) were also used to evaluate the specificity of assay. The LAMP assay showed 80.8% sensitivity (95% CI, 0.66-0.95) and 100% specificity (95% CI, 0.71-1.00) when compared with microbiological culture and PCR, both with 100% sensitivity (95% CI, 0.87-1.00) and 100% specificity (95% CI, 0.71-1.00). High-resolution melt (HRM) curve analysis following PCR was able to differentiate between salmonella isolates based on their melting points, and all specimens were genotyped in three distinct HRM curve profiles. Each normalised melt curve profile represented one salmonella serotype and differences between the three melt profiles were correlated with nucleotide variations in the target gene sequences which demonstrated high discriminatory power of this technique. The colourimetric LAMP assay provided an alternative detection method capable of being used in the field and showed analytical sensitivity for detection of 1 pg of salmonella DNA per reaction. The advantages and disadvantages of each test in detection of salmonella are discussed.
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Affiliation(s)
- Mojdeh Sadat Ghorashi
- School of Biomedical Sciences, Charles Sturt University, Wagga Wagga, NSW 2678, Australia,
| | - Sameer Dinkar Pant
- School of Agricultural, Environmental and Veterinary Sciences, Charles Sturt University, Wagga Wagga, NSW 2678, Australia: .,Graham Centre for Agricultural Innovation, Wagga Wagga, Australia:
| | - Seyed Ali Ghorashi
- School of Agricultural, Environmental and Veterinary Sciences, Charles Sturt University, Wagga Wagga, NSW 2678, Australia: .,Graham Centre for Agricultural Innovation, Wagga Wagga, Australia:
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Domesle KJ, Young SR, McDonald RC, Ge B. Versatility of a Salmonella Loop-Mediated Isothermal Amplification Assay Using Multiple Platforms and Master Mixes in Animal Food Matrices. J AOAC Int 2022; 105:1503-1515. [DOI: 10.1093/jaoacint/qsac059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 05/02/2022] [Accepted: 05/03/2022] [Indexed: 11/14/2022]
Abstract
Abstract
Background
Improvement in Salmonella detection methods greatly enhances the efficiency of various food testing programs. A Salmonella loop-mediated isothermal amplification (LAMP) assay has been validated in animal food through multi-laboratory validation.
Objective
The study aimed to demonstrate the versatility of this molecular assay while expanding it to multiple platforms and various reagent choices for use in animal food testing.
Methods
Following the U.S. Food and Drug Administration (FDA)’s Guidelines for the Validation of Analytical Methods for the Detection of Microbial Pathogens in Foods and Feeds, we examined the inclusivity, exclusivity, and LOD of the assay using two platforms (7500 Fast and Genie II) and three LAMP master mixes (GspSSD, GspSSD2.0, and WarmStart) in seven animal food matrixes (dry cat food, dry dog food, cattle feed, dairy feed, horse feed, poultry feed, and swine feed). The FDA’s Bacteriological Analytical Manual (BAM) Salmonella culture method was the reference method.
Results
Inclusivity and exclusivity data were consistent among all six platform and master mix combinations with a few exceptions. Comparable LODs were observed down to the single-cell level (WarmStart was 10-fold less sensitive). Performance was similar to the BAM method for detecting fractional positive results in seven animal food matrixes. Nonetheless, LAMP time to positive results and annealing/melting temperature differed among master mixes and platforms.
Conclusion
The Salmonella LAMP assay was successfully validated in two platforms and three master mixes, making it a flexible tool for use by the FDA’s field laboratories in regulatory testing of animal food and for adoption by other food testing programs.
Highlights
We demonstrated the LAMP assay’s versatility on two platforms and three master mixes for the rapid and reliable screening of Salmonella in seven animal food matrixes. GspSSD2.0 was the fastest master mix (time to positive results as early as 3.5 min) while Genie II had several attractive features from a user perspective.
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Affiliation(s)
- Kelly J Domesle
- U.S. Food and Drug Administration, Center for Veterinary Medicine, Office of Research, Division of Animal and Food Microbiology , 8401 Muirkirk Rd , Laurel, MD 20708, USA
| | - Shenia R Young
- U.S. Food and Drug Administration, Center for Veterinary Medicine, Office of Research, Division of Animal and Food Microbiology , 8401 Muirkirk Rd , Laurel, MD 20708, USA
| | - Ryan C McDonald
- U.S. Food and Drug Administration, Center for Veterinary Medicine, Office of Research, Division of Animal and Food Microbiology , 8401 Muirkirk Rd , Laurel, MD 20708, USA
| | - Beilei Ge
- U.S. Food and Drug Administration, Center for Veterinary Medicine, Office of Research, Division of Animal and Food Microbiology , 8401 Muirkirk Rd , Laurel, MD 20708, USA
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Niu Q, Su X, Lian L, Huang J, Xue S, Zhou W, Zhao H, Lu X, Cui S, Chen J, Yang B. Developing Qualitative Plasmid DNA Reference Materials to Detect Mechanisms of Quinolone and Fluoroquinolone Resistance in Foodborne Pathogens. Foods 2022; 11:154. [PMID: 35053887 PMCID: PMC8775000 DOI: 10.3390/foods11020154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 01/04/2022] [Accepted: 01/05/2022] [Indexed: 11/16/2022] Open
Abstract
The aim of this study was to develop homogeneous and stable plasmid DNA reference materials for detecting the mechanisms of resistance to quinolones and fluoroquinolones in foodborne pathogens. The DNA fragments of 11 target genes associated with quinolone and fluoroquinolone resistance were artificially synthesized, inserted into plasmid vectors, and transferred into recipient cells. PCR and sequencing of DNA were performed to assess the genetic stability of the target DNA in recombinant Escherichia coli DH5α cells during subculturing for 15 generations. The limit of detection (LOD) of the target DNA was determined using PCR and real-time qualitative PCR (qPCR). The homogeneity and storage stability of plasmid DNA reference materials were evaluated in terms of plasmid DNA quantity, PCR-measured gene expression, and qPCR threshold cycle. All 11 target DNAs were successfully synthesized and inserted into vectors to obtain recombinant plasmids. No nucleotide mutations were identified in the target DNA being stably inherited and detectable in the corresponding plasmids during subculturing of recombinant strains. When the target DNA was assessed using PCR and qPCR, the LOD was ≤1.77 × 105 and 3.26 × 104 copies/μL, respectively. Further, when the reference materials were stored at 37 °C for 13 days, 4 °C for 90 days, and -20 °C for 300 days, each target DNA was detectable by PCR, and no mutations were found. Although the threshold cycle values of qPCR varied with storage time, they were above the LOD, and no significant differences were found in the quantity of each plasmid DNA at different timepoints. Further, the homogeneity and stability of the materials were highly consistent with the requirements of standard reference materials. To summarize, considering that our plasmid DNA reference materials conformed to standard requirements, they can be used to detect the mechanisms of quinolone and fluoroquinolone resistance in foodborne pathogens.
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Affiliation(s)
- Qinya Niu
- College of Food Science and Engineering, Northwest A&F University, Xianyang 712100, China; (Q.N.); (X.S.); (L.L.); (J.H.); (S.X.)
| | - Xiumin Su
- College of Food Science and Engineering, Northwest A&F University, Xianyang 712100, China; (Q.N.); (X.S.); (L.L.); (J.H.); (S.X.)
| | - Luxin Lian
- College of Food Science and Engineering, Northwest A&F University, Xianyang 712100, China; (Q.N.); (X.S.); (L.L.); (J.H.); (S.X.)
| | - Jinling Huang
- College of Food Science and Engineering, Northwest A&F University, Xianyang 712100, China; (Q.N.); (X.S.); (L.L.); (J.H.); (S.X.)
| | - Shutong Xue
- College of Food Science and Engineering, Northwest A&F University, Xianyang 712100, China; (Q.N.); (X.S.); (L.L.); (J.H.); (S.X.)
| | - Wei Zhou
- Hebei Food Inspection and Research Institute, Hebei Food Safety Key Laboratory, Shijiazhuang 050091, China;
| | - Hongyang Zhao
- Chinese Academy of Inspection and Quarantine, Beijing 100176, China; (H.Z.); (X.L.)
| | - Xing’an Lu
- Chinese Academy of Inspection and Quarantine, Beijing 100176, China; (H.Z.); (X.L.)
| | - Shenghui Cui
- National Institutes for Food and Drug Control, Beijing 100050, China;
| | - Jia Chen
- College of Chemical Technology, Shijiazhuang University, Shijiazhuang 050035, China;
| | - Baowei Yang
- College of Food Science and Engineering, Northwest A&F University, Xianyang 712100, China; (Q.N.); (X.S.); (L.L.); (J.H.); (S.X.)
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Rajagopal R, Barnes CA, David JM, Goseland J, Goseland J. Evaluation of a commercial loop-mediated isothermal amplification assay, 3M TM Molecular Detection Assay 2 - Campylobacter, for the detection of Campylobacter from poultry matrices. Br Poult Sci 2021; 62:404-413. [PMID: 33517711 DOI: 10.1080/00071668.2021.1879992] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
1. The objective of this study was to evaluate performance of a commercial loop-mediated isothermal amplification (LAMP) method as an alternative method for the detection of Campylobacter spp. in primary production samples, poultry rinses and raw poultry products, as compared to the US Department of Agriculture Food Inspection Service Microbiology Laboratory Guide Book PCR reference method, MLG 41A.2. The Campylobacter spp. LAMP was used in conjunction with a ready-to-use enrichment broth that does not require microaerophilic incubation. After enrichment, boot swabs from poultry farms, carcase rinses and raw poultry products were tested by the LAMP method and the MLG 41A PCR method.3. The ready-to-use enrichment broth enabled the growth of Campylobacter spp. within 22 to 28 hours under aerobic incubation conditions. The LAMP method enabled Campylobacter detection in the enriched samples of various poultry matrices and had equivalent sensitivity and specificity to the MLG 41A PCR method.4. No significant difference (95% confidence interval) was found between the alternative and the MLG 41A PCR method, as determined by probability of detection analysis, except for neutralising buffered peptone water post-chill rinsates. For the post-chill neutralising buffered peptone water rinsates, the LAMP method had significantly higher confirmed portions.
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Affiliation(s)
| | | | | | - J Goseland
- WBA Analytical Laboratories, Inc., Springdale, AR, USA
| | - J Goseland
- WBA Analytical Laboratories, Inc., Springdale, AR, USA
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Domesle KJ, Young SR, Ge B. Rapid Screening for Salmonella in Raw Pet Food by Loop-Mediated Isothermal Amplification. J Food Prot 2021; 84:399-407. [PMID: 33057673 DOI: 10.4315/jfp-20-365] [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: 09/08/2020] [Accepted: 10/10/2020] [Indexed: 01/13/2023]
Abstract
ABSTRACT Raw pet food, composed of raw meat and vegetables, has increased in popularity in recent years. Multiple surveys and frequent recalls indicate that this commodity has a high risk of contamination with Salmonella and other foodborne pathogens. Improved screening methods are needed to meet the growing demand for testing. This matrix verification study aimed to apply a Salmonella loop-mediated isothermal amplification (LAMP) method, recently completed multilaboratory validation in dry dog food, in several raw pet food matrices, following the U.S. Food and Drug Administration (FDA)'s method validation guidelines. Five types of raw pet food, consisting of freeze-dried beef and chicken treats and frozen beef, pork, and turkey complete foods, were evaluated. For each matrix, two sets of ten 25-g test portions (seven inoculated with ≤30 cells of Salmonella Typhimurium and three uninoculated controls) were examined. One set was preenriched in buffered peptone water and the other one was preenriched in lactose broth, which was followed by LAMP screening using two isothermal master mixes (ISO-001 and ISO-004). All results were confirmed by culture as specified in the FDA Bacteriological Analytical Manual (BAM). The LAMP method accurately detected Salmonella in all inoculated test portions of the five raw pet food samples, regardless of the preenrichment broth used. Positive results could be obtained within 4 min of the LAMP run using the ISO-004 master mix. All uninoculated controls tested negative using LAMP or BAM. In addition, one turkey-based complete pet food sample was found to be already contaminated with three Salmonella serovars harboring multiple antimicrobial resistance genes. The Salmonella LAMP method offers a rapid, reliable, and robust tool for routine screening of Salmonella in raw pet food, which will help better ensure product safety and protect public health. HIGHLIGHTS
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Affiliation(s)
- Kelly J Domesle
- Division of Animal and Food Microbiology, Office of Research, Center for Veterinary Medicine, U.S. Food and Drug Administration, 8401 Muirkirk Road, Laurel, Maryland 20708, USA (ORCID: https://orcid.org/0000-0003-1873-5091 [K.J.D.]; https://orcid.org/0000-0001-6958-9907 [S.R.Y.]; https://orcid.org/0000-0001-7995-7427 [B.G.])
| | - Shenia R Young
- Division of Animal and Food Microbiology, Office of Research, Center for Veterinary Medicine, U.S. Food and Drug Administration, 8401 Muirkirk Road, Laurel, Maryland 20708, USA (ORCID: https://orcid.org/0000-0003-1873-5091 [K.J.D.]; https://orcid.org/0000-0001-6958-9907 [S.R.Y.]; https://orcid.org/0000-0001-7995-7427 [B.G.])
| | - Beilei Ge
- Division of Animal and Food Microbiology, Office of Research, Center for Veterinary Medicine, U.S. Food and Drug Administration, 8401 Muirkirk Road, Laurel, Maryland 20708, USA (ORCID: https://orcid.org/0000-0003-1873-5091 [K.J.D.]; https://orcid.org/0000-0001-6958-9907 [S.R.Y.]; https://orcid.org/0000-0001-7995-7427 [B.G.])
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10
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Zhao L, Wang J, Sun XX, Wang J, Chen Z, Xu X, Dong M, Guo YN, Wang Y, Chen P, Gao W, Geng Y. Development and Evaluation of the Rapid and Sensitive RPA Assays for Specific Detection of Salmonella spp. in Food Samples. Front Cell Infect Microbiol 2021; 11:631921. [PMID: 33718280 PMCID: PMC7946851 DOI: 10.3389/fcimb.2021.631921] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Accepted: 01/19/2021] [Indexed: 11/16/2022] Open
Abstract
Salmonella spp. is among the main foodborne pathogens which cause serious foodborne diseases. An isothermal real-time recombinase polymerase amplification (RPA) and lateral flow strip detection (LFS RPA) were used to detect Salmonella spp. targeting the conserved sequence of invasion protein A (invA). The Real-time RPA was performed in a portable florescence scanner at 39°C for 20 min. The LFS RPA was performed in an incubator block at 39°C for 15 min, under the same condition that the amplifications could be inspected by the naked eyes on the LFS within 5 min. The detection limit of Salmonella spp. DNA using real-time RPA was 1.1 × 101 fg, which was the same with real-time PCR but 10 times higher than that of LFS RPA assay. Moreover, the practicality of discovering Salmonella spp. was validated with artificially contaminated lamb, chicken, and broccoli samples. The analyzing time dropped from 60 min to proximately 5–12 min on the basis of the real-time and LFS RPA assays compared with the real-time PCR assay. Real-time and LFS RPA assays’ results were equally reliable. There was no cross-reactivity with other pathogens in both assays. In addition, the assays had good stability. All of these helped to show that the developed RPA assays were simple, rapid, sensitive, credible, and could be a potential point-of-need (PON) test required mere resources.
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Affiliation(s)
- Liwei Zhao
- Heibei Key Laboratory of Chinese Medicine Research on Cardiocerebrovascular Disease, Hebei University of Chinese Medicine, Shijiazhuang, China
| | - Jianchang Wang
- Food Microbiology and Animal Quarantine Laboratory, Technology Center of Shijiazhuang Customs, Shijiazhuang, China
| | - Xiao Xia Sun
- Food Microbiology and Animal Quarantine Laboratory, Technology Center of Shijiazhuang Customs, Shijiazhuang, China
| | - Jinfeng Wang
- Food Microbiology and Animal Quarantine Laboratory, Technology Center of Shijiazhuang Customs, Shijiazhuang, China
| | - Zhimin Chen
- Food Microbiology and Animal Quarantine Laboratory, Technology Center of Shijiazhuang Customs, Shijiazhuang, China
| | - Xiangdong Xu
- School of Public Health, Key Laboratory of Environment and Human Health, Hebei Medical University, Shijiazhuang, China
| | - Mengyuan Dong
- Heibei Key Laboratory of Chinese Medicine Research on Cardiocerebrovascular Disease, Hebei University of Chinese Medicine, Shijiazhuang, China
| | - Ya-Nan Guo
- Heibei Key Laboratory of Chinese Medicine Research on Cardiocerebrovascular Disease, Hebei University of Chinese Medicine, Shijiazhuang, China
| | - Yuanyuan Wang
- Heibei Key Laboratory of Chinese Medicine Research on Cardiocerebrovascular Disease, Hebei University of Chinese Medicine, Shijiazhuang, China
| | - Pingping Chen
- Heibei Key Laboratory of Chinese Medicine Research on Cardiocerebrovascular Disease, Hebei University of Chinese Medicine, Shijiazhuang, China
| | - Weijuan Gao
- Heibei Key Laboratory of Chinese Medicine Research on Cardiocerebrovascular Disease, Hebei University of Chinese Medicine, Shijiazhuang, China
| | - Yunyun Geng
- Heibei Key Laboratory of Chinese Medicine Research on Cardiocerebrovascular Disease, Hebei University of Chinese Medicine, Shijiazhuang, China
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11
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Kim MJ, Kim HJ, Kim HY. Direct triplex loop-mediated isothermal amplification assay for the point-of-care molecular detection of Salmonella genus, subspecies I, and serovar Typhimurium. Food Control 2021. [DOI: 10.1016/j.foodcont.2020.107504] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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12
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Pilchová V, Seinige D, Hennig-Pauka I, Büttner K, Abdulmawjood A, Kehrenberg C. Development and Validation of a Loop-Mediated Isothermal Amplification (LAMP) Assay for Rapid Detection of Glaesserella ( Haemophilus) parasuis. Microorganisms 2020; 9:E41. [PMID: 33375599 PMCID: PMC7823361 DOI: 10.3390/microorganisms9010041] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 12/19/2020] [Accepted: 12/21/2020] [Indexed: 11/16/2022] Open
Abstract
Glaesserella parasuis is a fastidious pathogen that colonizes the respiratory tract of pigs and can lead to considerable economic losses in pig production. Therefore, a rapid detection assay for the pathogen, preferably applicable in the field, is important. In the current study, we developed a new and improved detection method using loop-mediated isothermal amplification (LAMP). This assay, which targets the infB gene, was tested on a collection of 60 field isolates of G. parasuis comprising 14 different serovars. In addition, 63 isolates from seven different closely related species of the family Pasteurellaceae, including A. indolicus, A. porcinus, and A. minor, and a species frequently found in the respiratory tract of pigs were used for exclusivity experiments. This assay showed an analytical specificity of 100% (both inclusivity and exclusivity) and an analytical sensitivity of 10 fg/µL. In further steps, 36 clinical samples were tested with the LAMP assay. An agreement of 77.1 (95% CI: 59.9, 89.6) and 91.4% (95% CI: 75.9, 98.2) to the culture-based and PCR results was achieved. The mean limit of detection for the spiked bronchoalveolar lavage fluid was 2.58 × 102 CFU/mL. A colorimetric assay with visual detection by the naked eye was tested to provide an alternative method in the field and showed the same sensitivity as the fluorescence-based LAMP assay. Overall, the optimized LAMP assay represents a fast and reliable method and is suitable for detecting G. parasuis in the laboratory environment or in the field.
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Affiliation(s)
- Veronika Pilchová
- Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, Foundation, 30559 Hannover, Germany;
| | - Diana Seinige
- Lower Saxony State Office for Consumer Protection and Food Safety, 26203 Wardenburg, Germany;
| | - Isabel Hennig-Pauka
- Field Station for Epidemiology in Bakum, University of Veterinary Medicine Hannover, Foundation, 30559 Hannover, Germany;
| | - Kathrin Büttner
- Unit for Bioinformatics and Data Processing, Justus-Liebig-University Giessen, 35392 Giessen, Germany;
| | - Amir Abdulmawjood
- Institute of Food Quality and Food Safety, University of Veterinary Medicine Hannover, Foundation, 30173 Hannover, Germany;
| | - Corinna Kehrenberg
- Institute for Veterinary Food Science, Justus-Liebig-University Giessen, 35392 Giessen, Germany
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13
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Waldman J, Souza MN, Fonseca ASK, Ikuta N, Lunge VR. Direct detection of Salmonella from poultry samples by DNA isothermal amplification. Br Poult Sci 2020; 61:653-659. [PMID: 32772559 DOI: 10.1080/00071668.2020.1808188] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
1. Salmonellosis is one of the most important diseases in public health and it is usually associated with poultry product consumption. This study aimed to validate rapid methods to detect Salmonella spp. from poultry samples. 2. A DNA isothermal amplification method, previously developed for other matrices, was applied for the specific detection of Salmonella spp. from various samples, including poultry tissues, drag and boot swabs, faeces and feed. A new procedure was validated with Salmonella spp. serotypes and isolates from other enteric bacterial species, as well as naturally contaminated poultry samples. 3. The study demonstrated the successful development and implementation of a procedure, including a DNA isothermal amplification method, for the detection of Salmonella spp. directly from tissues, drag and boot swabs, faeces and feed. The whole procedure can be performed in less than 24 hours and it has been successfully used in a veterinary diagnostic laboratory.
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Affiliation(s)
- J Waldman
- Laboratório de Diagnóstico Molecular, Programa de Pós-Graduação em Biologia Celular e Molecular Aplicada à Saúde, Universidade Luterana do Brasil (ULBRA) , Canoas, Brazil
| | - M N Souza
- Laboratório de Diagnóstico Molecular, Programa de Pós-Graduação em Biologia Celular e Molecular Aplicada à Saúde, Universidade Luterana do Brasil (ULBRA) , Canoas, Brazil
| | | | - N Ikuta
- Laboratório de Diagnóstico Molecular, Programa de Pós-Graduação em Biologia Celular e Molecular Aplicada à Saúde, Universidade Luterana do Brasil (ULBRA) , Canoas, Brazil.,Simbios Biotecnologia , Cachoeirinha, Brazil
| | - V R Lunge
- Laboratório de Diagnóstico Molecular, Programa de Pós-Graduação em Biologia Celular e Molecular Aplicada à Saúde, Universidade Luterana do Brasil (ULBRA) , Canoas, Brazil.,Simbios Biotecnologia , Cachoeirinha, Brazil
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14
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Improvement of Loop-Mediated Isothermal Amplification Combined with Chromatographic Flow Dipstick Assay for Salmonella in Food Samples. FOOD ANAL METHOD 2020. [DOI: 10.1007/s12161-020-01760-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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15
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Ripolles-Avila C, Martínez-Garcia M, Capellas M, Yuste J, Fung DYC, Rodríguez-Jerez JJ. From hazard analysis to risk control using rapid methods in microbiology: A practical approach for the food industry. Compr Rev Food Sci Food Saf 2020; 19:1877-1907. [PMID: 33337076 DOI: 10.1111/1541-4337.12592] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 05/14/2020] [Accepted: 05/15/2020] [Indexed: 12/14/2022]
Abstract
The prevention of foodborne diseases is one of the main objectives of health authorities. To this effect, analytical techniques to detect and/or quantify the microbiological contamination of foods prior to their release onto the market are required. Management and control of foodborne pathogens have generally been based on conventional detection methodologies, which are not only time-consuming and labor-intensive but also involve high consumable materials costs. However, this management perspective has changed over time given that the food industry requires efficient analytical methods that obtain rapid results. This review covers the historical context of traditional methods and their passage in time through to the latest developments in rapid methods and their implementation in the food sector. Improvements and limitations in the detection of the most relevant pathogens are discussed from a perspective applicable to the current situation in the food industry. Considering efforts that are being done and recent developments, rapid and accurate methods already used in the food industry will be also affordable and portable and offer connectivity in near future, which improves decision-making and safety throughout the food chain.
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Affiliation(s)
- Carolina Ripolles-Avila
- Area of Human Nutrition and Food Science, Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Maria Martínez-Garcia
- Area of Human Nutrition and Food Science, Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Marta Capellas
- Area of Food Technology, Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Josep Yuste
- Area of Food Technology, Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Daniel Y C Fung
- Call Hall, Department of Animal Sciences and Industry, Kansas State University, Manhattan, Kansas
| | - José-Juan Rodríguez-Jerez
- Area of Human Nutrition and Food Science, Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Barcelona, Spain
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16
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Highly Sensitive and Specific Detection and Serotyping of Five Prevalent Salmonella Serovars by Multiple Cross-Displacement Amplification. J Mol Diagn 2020; 22:708-719. [PMID: 32359725 DOI: 10.1016/j.jmoldx.2020.02.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2019] [Revised: 12/16/2019] [Accepted: 02/20/2020] [Indexed: 02/08/2023] Open
Abstract
Salmonella is a common cause of foodborne disease worldwide, including Australia. More than 85% of outbreaks of human salmonellosis in Australia were caused by five Salmonella serovars. Rapid, accurate, and sensitive identification of Salmonella serovars is vital for diagnosis and public health surveillance. Recently, an isothermal amplification technique, termed multiple cross-displacement amplification (MCDA), has been employed to detect Salmonella at the species level. Herein, seven MCDA assays were developed and evaluated for rapid detection and differentiation of the five most common Salmonella serovars in Australia: Typhimurium, Enteritidis, Virchow, Saintpaul, and Infantis. MCDA primer sets were designed by targeting seven serovar/lineage-specific gene markers identified through genomic comparisons. The sensitivity and specificity of the seven MCDA assays were evaluated using 79 target strains and 32 nontarget strains. The assays were all highly sensitive and specific to target serovars, with the sensitivity ranging from 92.9% to 100% and the specificity from 93.3% to 100%. The limit of detection of the seven MCDA assays was 50 fg per reaction (10 copies) from pure DNA, and positive results were detected in as little as 8 minutes. These seven MCDA assays offer a rapid, accurate, and sensitive serotyping method. With further validation in clinically relevant conditions, these assays could be used for culture-independent serotyping of common Salmonella serovars directly from clinical samples.
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17
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Lewis E, Hudson JA, Cook N, Barnes JD, Haynes E. Next-generation sequencing as a screening tool for foodborne pathogens in fresh produce. J Microbiol Methods 2020; 171:105840. [PMID: 31945388 DOI: 10.1016/j.mimet.2020.105840] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 01/10/2020] [Accepted: 01/10/2020] [Indexed: 01/10/2023]
Abstract
Next generation sequencing (NGS) approaches are increasingly applied to tracing microbial contaminants entering the food chain due to NGS' untargeted nature and ability to investigate non-culturable (and/or difficult to culture) organisms while yielding genomic information about the microbiota. So far, a plethora of microbes has been shown to be associated with fresh produce, but few studies have utilised NGS to identify contamination with human pathogens. This study aims to establish the limit of detection (LoD) for Salmonella and phage MS2 (a Norovirus surrogate) contamination of fresh produce employing NGS approaches on the Illumina MiSeq: 16S amplicon-sequencing, and RNA-seq, using ScriptSeq (Illumina) and NEBNext (New England BioLabs) kits. ScriptSeq proved the most sensitive approach; delivering an LoD of 104 CFU reaction-1 (Colony Forming Units) for Salmonella and 105 PFU reaction-1 (Plaque Forming Units) for phage MS2. Use of the NEBNext kit resulted in detection of Salmonella at 106 CFU reaction-1 and phage MS2 at 107 PFU reaction-1. 16S amplicon-sequencing yielded a similar LoD of 105 CFU reaction-1 for Salmonella but could not detect MS2. The tested NGS methodologies, in combination with bioinformatics approaches applied, proved less sensitive than conventional microbial detection approaches.
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Affiliation(s)
- E Lewis
- IAFRI, Newcastle University, Newcastle upon Tyne, UK; Fera, National Agrifood Innovation Campus, Sand Hutton, York, UK.
| | | | - N Cook
- Jorvik Food Safety Services, York, UK
| | - J D Barnes
- IAFRI, Newcastle University, Newcastle upon Tyne, UK
| | - E Haynes
- Fera, National Agrifood Innovation Campus, Sand Hutton, York, UK
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18
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Lin L, Zheng Q, Lin J, Yuk HG, Guo L. Immuno- and nucleic acid-based current technique for Salmonella detection in food. Eur Food Res Technol 2020. [DOI: 10.1007/s00217-019-03423-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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19
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Instrument-Free and Visual Detection of Salmonella Based on Magnetic Nanoparticles and an Antibody Probe Immunosensor. Int J Mol Sci 2019; 20:ijms20184645. [PMID: 31546808 PMCID: PMC6769488 DOI: 10.3390/ijms20184645] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 09/14/2019] [Accepted: 09/17/2019] [Indexed: 11/17/2022] Open
Abstract
Salmonella, a common foodborne pathogen, causes many cases of foodborne illness and poses a threat to public health worldwide. Immunological detection systems can be combined with nanoparticles to develop sensitive and portable detection technologies for timely screening of Salmonella infections. Here, we developed an antibody-probe-based immuno-N-hydroxysuccinimide (NHS) bead (AIB) system to detect Salmonella. After adding the antibody probe, Salmonella accumulated in the samples on the surfaces of the immuno-NHS beads (INBs), forming a sandwich structure (INB–Salmonella–probes). We demonstrated the utility of our AIB diagnostic system for detecting Salmonella in water, milk, and eggs, with a sensitivity of 9 CFU mL−1 in less than 50 min. The AIB diagnostic system exhibits highly specific detection and no cross-reaction with other similar microbial strains. With no specialized equipment or technical requirements, the AIB diagnostic method can be used for visual, rapid, and point-of-care detection of Salmonella.
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20
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Ge B, Domesle KJ, Yang Q, Hammack TS, Wang SS, Deng X, Hu L, Zhang G, Hu Y, Lai X, Chou KX, Dollete JR, Hirneisen KA, La SP, Richter RS, Rai DR, Yousefvand AA, Park PK, Wu CH, Eames T, Kiang D, Sheng J, Wu D, Hahn L, Ledger L, Logie C, You Q, Slavic D, Cai H, Ayers SL, Young SR, Pamboukian R. Multi-Laboratory Validation of a Loop-Mediated Isothermal Amplification Method for Screening Salmonella in Animal Food. Front Microbiol 2019; 10:562. [PMID: 30984125 PMCID: PMC6447708 DOI: 10.3389/fmicb.2019.00562] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 03/05/2019] [Indexed: 11/17/2022] Open
Abstract
Loop-mediated isothermal amplification (LAMP) has gained wide popularity in the detection of Salmonella in foods owing to its simplicity, rapidity, and robustness. This multi-laboratory validation (MLV) study aimed to validate a Salmonella LAMP-based method against the United States Food and Drug Administration (FDA) Bacteriological Analytical Manual (BAM) Chapter 5 Salmonella reference method in a representative animal food matrix (dry dog food). Fourteen independent collaborators from seven laboratories in the United States and Canada participated in the study. Each collaborator received two sets of 24 blind-coded dry dog food samples (eight uninoculated; eight inoculated at a low level, 0.65 MPN/25 g; and eight inoculated at a high level, 3.01 MPN/25 g) and initiated the testing on the same day. The MLV study used an unpaired design where different test portions were analyzed by the LAMP and BAM methods using different preenrichment protocols (buffered peptone water for LAMP and lactose broth for BAM). All LAMP samples were confirmed by culture using the BAM method. BAM samples were also tested by LAMP following lactose broth preenrichment (paired samples). Statistical analysis was carried out by the probability of detection (POD) per AOAC guidelines and by a random intercept logistic regression model. Overall, no significant differences in POD between the Salmonella LAMP and BAM methods were observed with either unpaired or paired samples, indicating the methods were comparable. LAMP testing following preenrichment in buffered peptone water or lactose broth also resulted in insignificant POD differences (P > 0.05). The MLV study strongly supports the utility and applicability of this rapid and reliable LAMP method in routine regulatory screening of Salmonella in animal food.
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Affiliation(s)
- Beilei Ge
- Division of Animal and Food Microbiology, Office of Research, Center for Veterinary Medicine, United States Food and Drug Administration, Laurel, MD, United States
| | - Kelly J. Domesle
- Division of Animal and Food Microbiology, Office of Research, Center for Veterinary Medicine, United States Food and Drug Administration, Laurel, MD, United States
| | - Qianru Yang
- Division of Animal and Food Microbiology, Office of Research, Center for Veterinary Medicine, United States Food and Drug Administration, Laurel, MD, United States
| | - Thomas S. Hammack
- Office of Regulatory Science, Center for Food Safety and Applied Nutrition, United States Food and Drug Administration, College Park, MD, United States
| | - Shizhen S. Wang
- Office of Analytics and Outreach, Center for Food Safety and Applied Nutrition, United States Food and Drug Administration, College Park, MD, United States
| | - Xiaohong Deng
- Office of Regulatory Science, Center for Food Safety and Applied Nutrition, United States Food and Drug Administration, College Park, MD, United States
| | - Lijun Hu
- Office of Regulatory Science, Center for Food Safety and Applied Nutrition, United States Food and Drug Administration, College Park, MD, United States
| | - Guodong Zhang
- Office of Regulatory Science, Center for Food Safety and Applied Nutrition, United States Food and Drug Administration, College Park, MD, United States
| | - Yuan Hu
- Northeast Food and Feed Laboratory, Office of Regulatory Affairs, United States Food and Drug Administration, Jamaica, NY, United States
| | - Xiaokuang Lai
- Northeast Food and Feed Laboratory, Office of Regulatory Affairs, United States Food and Drug Administration, Jamaica, NY, United States
| | - Kyson X. Chou
- Pacific Southwest Food and Feed Laboratory, Office of Regulatory Affairs, United States Food and Drug Administration, Irvine, CA, United States
| | - Jan Ryan Dollete
- Pacific Southwest Food and Feed Laboratory, Office of Regulatory Affairs, United States Food and Drug Administration, Irvine, CA, United States
| | - Kirsten A. Hirneisen
- Pacific Southwest Food and Feed Laboratory, Office of Regulatory Affairs, United States Food and Drug Administration, Irvine, CA, United States
| | - Sammie P. La
- Pacific Southwest Food and Feed Laboratory, Office of Regulatory Affairs, United States Food and Drug Administration, Irvine, CA, United States
| | - Richelle S. Richter
- Pacific Southwest Food and Feed Laboratory, Office of Regulatory Affairs, United States Food and Drug Administration, Irvine, CA, United States
| | - Diyo R. Rai
- San Francisco Laboratory, Office of Regulatory Affairs, United States Food and Drug Administration, Alameda, CA, United States
| | - Azadeh A. Yousefvand
- San Francisco Laboratory, Office of Regulatory Affairs, United States Food and Drug Administration, Alameda, CA, United States
| | - Paul K. Park
- Food and Drug Laboratory Branch, California Department of Public Health, Richmond, CA, United States
| | - Cindy H. Wu
- Food and Drug Laboratory Branch, California Department of Public Health, Richmond, CA, United States
| | - Tameji Eames
- Food and Drug Laboratory Branch, California Department of Public Health, Richmond, CA, United States
| | - David Kiang
- Food and Drug Laboratory Branch, California Department of Public Health, Richmond, CA, United States
| | - Ju Sheng
- Office of Indiana State Chemist, Purdue University, West Lafayette, IN, United States
| | - Dancia Wu
- Office of Indiana State Chemist, Purdue University, West Lafayette, IN, United States
| | - Lori Hahn
- Animal Health Laboratory, University of Guelph, Guelph, ON, Canada
| | - Lisa Ledger
- Animal Health Laboratory, University of Guelph, Guelph, ON, Canada
| | - Cynthia Logie
- Animal Health Laboratory, University of Guelph, Guelph, ON, Canada
| | - Qiu You
- Animal Health Laboratory, University of Guelph, Guelph, ON, Canada
| | - Durda Slavic
- Animal Health Laboratory, University of Guelph, Guelph, ON, Canada
| | - Hugh Cai
- Animal Health Laboratory, University of Guelph, Guelph, ON, Canada
| | - Sherry L. Ayers
- Division of Animal and Food Microbiology, Office of Research, Center for Veterinary Medicine, United States Food and Drug Administration, Laurel, MD, United States
| | - Shenia R. Young
- Division of Animal and Food Microbiology, Office of Research, Center for Veterinary Medicine, United States Food and Drug Administration, Laurel, MD, United States
| | - Ruiqing Pamboukian
- Office of Regulatory Science, Office of Regulatory Affairs, United States Food and Drug Administration, Rockville, MD, United States
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21
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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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22
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Arunrut N, Kiatpathomchai W, Ananchaipattana C. Development and evaluation of real‐time loop mediated isothermal amplification assay for rapid and sensitive detection ofSalmonellaspp. in chicken meat products. J Food Saf 2018. [DOI: 10.1111/jfs.12564] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Narong Arunrut
- Department of Biology, Faculty of Science and TechnologyRajamangala University of Technology Thanyaburi, 39 Muh1 Thanyaburi Pathum Thani Thailand
- Bioengineering and Sensing Technology Laboratory, BIOTECNational Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Phahonyothin Rd., Khlong Nueng Khlong Luang Pathum Thani Thailand
| | - Wansika Kiatpathomchai
- Bioengineering and Sensing Technology Laboratory, BIOTECNational Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Phahonyothin Rd., Khlong Nueng Khlong Luang Pathum Thani Thailand
| | - Chiraporn Ananchaipattana
- Department of Biology, Faculty of Science and TechnologyRajamangala University of Technology Thanyaburi, 39 Muh1 Thanyaburi Pathum Thani Thailand
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Yang Q, Domesle KJ, Ge B. Loop-Mediated Isothermal Amplification for Salmonella Detection in Food and Feed: Current Applications and Future Directions. Foodborne Pathog Dis 2018; 15:309-331. [PMID: 29902082 PMCID: PMC6004089 DOI: 10.1089/fpd.2018.2445] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Loop-mediated isothermal amplification (LAMP) has become a powerful alternative to polymerase chain reaction (PCR) for pathogen detection in clinical specimens and food matrices. Nontyphoidal Salmonella is a zoonotic pathogen of significant food and feed safety concern worldwide. The first study employing LAMP for the rapid detection of Salmonella was reported in 2005, 5 years after the invention of the LAMP technology in Japan. This review provides an overview of international efforts in the past decade on the development and application of Salmonella LAMP assays in a wide array of food and feed matrices. Recent progress in assay design, platform development, commercial application, and method validation is reviewed. Future perspectives toward more practical and wider applications of Salmonella LAMP assays in food and feed testing are discussed.
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Affiliation(s)
- Qianru Yang
- Division of Animal and Food Microbiology, Office of Research, Center for Veterinary Medicine , U.S. Food and Drug Administration, Laurel, Maryland
| | - Kelly J Domesle
- Division of Animal and Food Microbiology, Office of Research, Center for Veterinary Medicine , U.S. Food and Drug Administration, Laurel, Maryland
| | - Beilei Ge
- Division of Animal and Food Microbiology, Office of Research, Center for Veterinary Medicine , U.S. Food and Drug Administration, Laurel, Maryland
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