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Mahanty S, Majumder S, Paul R, Boroujerdi R, Valsami-Jones E, Laforsch C. A review on nanomaterial-based SERS substrates for sustainable agriculture. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 950:174252. [PMID: 38942304 DOI: 10.1016/j.scitotenv.2024.174252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 06/06/2024] [Accepted: 06/22/2024] [Indexed: 06/30/2024]
Abstract
The agricultural sector plays a pivotal role in driving the economy of many developing countries. Any dent in this economical structure may have a severe impact on a country's population. With rising climate change and increasing pollution, the agricultural sector is experiencing significant damage. Over time this cumulative damage will affect the integrity of food crops and create food security issues around the world. Therefore, an early warning system is needed to detect possible stress on food crops. Here we present a review of the recent developments in nanomaterial-based Surface Enhanced Raman Spectroscopy (SERS) substrates which could be utilized to monitor agricultural crop responses to natural and anthropogenic stress. Initially, our review delves into diverse and cost-effective strategies for fabricating SERS substrates, emphasizing their intelligent utilization across various agricultural scenarios. In the second phase of our review, we spotlight the specific application of SERS in addressing critical food security issues. By detecting nutrients, hormones, and effector molecules in plants, SERS provides valuable insights into plant health. Furthermore, our exploration extends to the detection of contaminants, chemicals, and foodborne pathogens within plants, showcasing the versatility of SERS in ensuring food safety. The cumulative knowledge derived from these discussions illustrates the transformative potential of SERS in bolstering the agricultural economy. By enhancing precision in nutrient management, monitoring plant health, and enabling rapid detection of harmful substances, SERS emerges as a pivotal tool in promoting sustainable and secure agricultural practices. Its integration into agricultural processes not only augments productivity but also establishes a robust defence against potential threats to crop yield and food quality. As SERS continues to evolve, its role in shaping the future of agriculture becomes increasingly pronounced, promising a paradigm shift in how we approach and address challenges in food production and safety.
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Affiliation(s)
- Shouvik Mahanty
- Department of Atomic Energy, Saha Institute of Nuclear Physics, Sector 1, AF Block, Bidhannagar, Kolkata 700064, West Bengal, India
| | - Santanu Majumder
- Department of Life and Environmental Sciences, Bournemouth University (Talbot Campus), Fern Barrow, Poole BH12 5BB, UK.
| | - Richard Paul
- Department of Life and Environmental Sciences, Bournemouth University (Talbot Campus), Fern Barrow, Poole BH12 5BB, UK
| | - Ramin Boroujerdi
- Department of Life and Environmental Sciences, Bournemouth University (Talbot Campus), Fern Barrow, Poole BH12 5BB, UK
| | - Eugenia Valsami-Jones
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
| | - Christian Laforsch
- Department of Animal Ecology I and BayCEER, University of Bayreuth, Bayreuth, Germany
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Li X, Yang F, Li H, Hu Z, Yu W, Zhang Y, Gao J. Array-based specific classification of bacterial species via ligands with dimethylamino/amino groups. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:5812-5819. [PMID: 39140766 DOI: 10.1039/d4ay00903g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/15/2024]
Abstract
The early detection of bacterial species plays a crucial role in patient prognosis and the development of effective therapeutic regimens. This study introduces an accessible and promising colorimetric sensor array designed to classify gram-positive (G+) and gram-negative (G-) bacterial species. The classification relies on 6 chemical ligands with dimethylamino/amino groups as sensing elements and silver nanotriangles as colorimetric probes. Using these specific sensor arrays, we successfully differentiated G- and G+ bacterial species and discriminated individual bacterial strains, and the sensors exhibited remarkable reproducibility and high sensitivity. Moreover, the sensor array can identify bacterial mixtures and bacteria at varying concentrations, underscoring its versatility. In summary, this sensor array offers an effective tool for bacterial analysis with promising applications in the field of biomedical diagnostics.
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Affiliation(s)
- Xizhe Li
- Interdisciplinary Research Center of Biology & Catalysis, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, China.
| | - Fan Yang
- Xingzichuan Drilling Company, Yanchang Oil Mine Management Bureau, Yanan 717400, China
| | - Haojie Li
- Interdisciplinary Research Center of Biology & Catalysis, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, China.
| | - Zhi Hu
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, China
| | - Weiting Yu
- College of Environment, Zhejiang University of Technology, Hangzhou 310032, China
| | - Yuchen Zhang
- Department of Pharmacy, Xi'an No. 3 Hospital, The Affiliated Hospital of Northwest University, Xi'an 710021, China.
| | - Jie Gao
- Interdisciplinary Research Center of Biology & Catalysis, School of Life Sciences, Northwestern Polytechnical University, Xi'an 710072, China.
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Parihar R, Deb R, Niharika J, Thakur P, Pegu SR, Sengar GS, Sonowal J, Das PJ, Rajkhowa S, Raj A, Gupta VK. Development of triplex assay for simultaneous detection of Escherichia coli, methicillin resistant and sensitive Staphylococcus aureus in raw pork samples of retail markets. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2024; 61:1516-1524. [PMID: 38966784 PMCID: PMC11219700 DOI: 10.1007/s13197-023-05917-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 11/18/2023] [Accepted: 12/13/2023] [Indexed: 07/06/2024]
Abstract
Escherichia coli and Staphylococcus aureus are the most important food borne pathogen transmitting from animal meat and meat products. Therefore, it is vital to design an accurate and specific diagnostic tool for identifying those food-borne pathogens in animal meat and meat products. In the current study, E. coli, methicillin-resistant and sensitive S. aureus (MRSA and MSSA) were simultaneously detected using a developed triplex PCR-based technique. To obtain an optimal reaction parameter, the multiplex assay was optimised by changing just one parameter while holding the others constant. Specificity of the assay was assessed using several porcine bacterial template DNA. The plasmid DNA was used to test the multiplex PCR assay's sensitivity and interference in spiked pork samples. E. coli, MRSA, and MSSA each have PCR amplified products with sizes of 335, 533, and 209 bp, respectively. The assay detects a minimum microbial load of 102 CFU/μl for all the three pathogens and can identify bacterial DNA as low as 10-2 ng/µl. The assay was validated employing 210 pork samples obtained from retail meat shops and slaughter houses, with MRSA, E. coli, and MSSA with the occurrence rate of 1.9%, 42.38%, and 18.1%, respectively. The rate of mixed bacterial contamination in pork meat samples examined with the developed method was 6.19%, 1.43%, 1.90%, and 1.43% for MSSA & E. coli, MRSA & E. coli, MSSA & MRSA, and E. coli, MSSA & MRSA, respectively. The developed multiplex PCR assay is quick and efficient, and it can distinguish between different bacterial pathogens in a single reaction tube.
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Affiliation(s)
- Ranjeet Parihar
- ICAR-National Research Centre on Pig, Guwahati, Assam India
- All India Institute of Hygiene and Public Health, Government of India, Kolkata, West Bengal India
| | - Rajib Deb
- ICAR-National Research Centre on Pig, Guwahati, Assam India
| | - Jagna Niharika
- ICAR-National Research Centre on Pig, Guwahati, Assam India
- All India Institute of Hygiene and Public Health, Government of India, Kolkata, West Bengal India
| | - Priyanka Thakur
- ICAR-National Research Centre on Pig, Guwahati, Assam India
- All India Institute of Hygiene and Public Health, Government of India, Kolkata, West Bengal India
| | | | | | | | | | | | - Atul Raj
- All India Institute of Hygiene and Public Health, Government of India, Kolkata, West Bengal India
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Lee JI, Kim SS, Park JW, Kang DH. Detection of Salmonella enterica serovar Montevideo in food products using specific PCR primers developed by comparative genomics. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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5
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Hybrid RCA-DLS assay combined with aPCR for sensitive Salmonella enteritidis detection. Anal Biochem 2022; 646:114647. [DOI: 10.1016/j.ab.2022.114647] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 02/23/2022] [Accepted: 03/06/2022] [Indexed: 11/23/2022]
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Hassan WMM, Tawab AAAE, El-Shannat SM. Current advances in molecular subtyping using multilocus variable number of tandem repeat analysis of Salmonella Enteritidis and Salmonella Typhimurium in Egyptian chickens. Vet World 2020; 13:2252-2259. [PMID: 33281364 PMCID: PMC7704301 DOI: 10.14202/vetworld.2020.2252-2259] [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] [Received: 06/08/2020] [Accepted: 09/21/2020] [Indexed: 11/23/2022] Open
Abstract
Aim: This study aimed to characterize the genetic diversity, evolutionary level, and prevalence of genotypes of common isolates of Salmonella (Salmonella Enteritidis and Salmonella Typhimurium). Using one of the most advanced molecular recognition techniques, multilocus variable number of tandem repeat analysis (MLVA), we characterized the genotype and prevalence of S. Enteritidis and S. Typhimurium. Materials and Methods: One hundred and twenty-five internal organ samples were collected from the major chicken slaughterhouses in Egypt, and Salmonella species were isolated. PCR was utilized to amplify the IE-1 and Flic-C genes to identify S. Enteritidis and S. Typhimurium DNA, respectively, from Salmonella isolates. MLVA was applied on nine samples of S. Enteritidis DNA and three samples of S. Typhimurium DNA. Six variable number tandem repeat (VNTR) loci (Sal02, Sal04, Sal06, Sal10, Sal20, and Sal23) were amplified. Results: Of the examined samples (n=125), a total of 12 isolates (9.6%) were either identified as Enteritidis or Typhimurium. PCR-mediated amplification of IE-1 and Flic-C revealed that 75% (n=9) of the 12 Salmonella isolates were S. Enteritidis and 25% (n=3) were S. Typhimurium. The six loci amplified through MLVA had allelic diversity. The most discriminatory heterogenic locus for S. Enteritidis was Sal20. Sal04 and Sal23 were the most discriminatory heterogenic loci for S. Typhimurium. VNTR allelic profile analysis revealed nine unique genotypes for S. Enteritidis and three for S. Typhimurium. Conclusion: This study was the first to use MLVA analysis to identify S. Enteritidis and S. Typhimurium strains isolated from chickens in Egypt. The molecular typing data reported herein allowed us to characterize the genotypes of S. Enteritidis and S. Typhimurium that are most prevalent in Egyptian chickens. Moreover, this epidemiological information provides valuable insight on how to prevent disease transmission. Moreover, our methods provide an alternative to traditional serotyping techniques that may produce inaccurate strain identifications for organisms with rough lipopolysaccharide structures.
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Affiliation(s)
- Wafaa M M Hassan
- Reference Laboratory for Quality Control on Poultry Production, Animal Health Research Institute, Dokki, Giza, Egypt
| | - Ashraf A Abd El Tawab
- Department of Bacteriology, Immunology, and Mycology, Faculty of Veterinary Medicine, Benha University, Benha, Egypt
| | - Sara M El-Shannat
- Department of Microbiology, Animal Health Research Institute, Marsa Matruh, Egypt
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Liu P, Wang Y, Han L, Cai Y, Ren H, Ma T, Li X, Petrenko VA, Liu A. Colorimetric Assay of Bacterial Pathogens Based on Co 3O 4 Magnetic Nanozymes Conjugated with Specific Fusion Phage Proteins and Magnetophoretic Chromatography. ACS APPLIED MATERIALS & INTERFACES 2020; 12:9090-9097. [PMID: 32023032 DOI: 10.1021/acsami.9b23101] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
It is important to detect pathogens rapidly, sensitively, and selectively for clinical medicine, homeland security, food safety, and environmental control. We report here a specific and sensitive colorimetric assay that incorporated a bovine serum albumin-templated Co3O4 magnetic nanozyme (Co3O4 MNE) with a novel specific fusion phage protein and magnetophoretic chromatography to detect Staphylococcus aureus. The Co3O4 MNE was conjugated to S. aureus-specific fusion-pVIII (Co3O4 MNE@fusion-pVIII), screened from the S. aureus-specific phage AQTFLGEQD (the phage monoclone is denoted by the peptide sequence). The as-prepared triple-functional Co3O4 MNE@fusion-pVIII particles were capable of capturing S. aureus in sterile milk, which were then isolated from milk magnetically. Assisted by polyethylene glycol, the Co3O4 MNE@fusion-pVIII@S. aureus complex was separated from the free Co3O4 MNE@fusion-pVIII by magnetophoretic chromatography in an external magnetic field. After transferring the isolated Co3O4 MNE@fusion-pVIII@S. aureus complexes into a 96-well plate, diammonium salt of 2,2'-azino-bis(3-ethylbenzo-thiazoline-6-sulfonic acid) and H2O2 were added to develop color because of the peroxidase mimetics activity of the Co3O4 MNE. A S. aureus concentration within 10-10,000 cfu/mL in milk can be detected (detection limit: 8 cfu/mL). The as-developed method is simple, cost-efficient, and sensitive, which is useful for rapidly diagnosing pathogenic bacteria and helpful to prevent disease outbreaks induced by pathogens in developing countries.
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Affiliation(s)
- Pei Liu
- Institute for Chemical Biology & Biosensing, and College of Life Sciences , Qingdao University , 308 Ningxia Road , Qingdao 266071 , China
- Faculty of Life Science and Food Engineering, Jiangsu Provincial Engineering Laboratory for Biomass Conversion and Process Integration , HuaiYin Institute of Technology , 1 Meicheng East Road , Huaian 223003 , China
| | - Yanbo Wang
- Institute for Chemical Biology & Biosensing, and College of Life Sciences , Qingdao University , 308 Ningxia Road , Qingdao 266071 , China
| | - Lei Han
- College of Chemistry and Pharmaceutical Sciences , Qingdao Agricultural University , 700 Changcheng Road , Qingdao 266109 , China
| | - Yuanyuan Cai
- School of Pharmacy, Medical College , Qingdao University , Qingdao 266021 , China
| | - Han Ren
- School of Pharmacy, Medical College , Qingdao University , Qingdao 266021 , China
| | - Tengxin Ma
- Institute for Chemical Biology & Biosensing, and College of Life Sciences , Qingdao University , 308 Ningxia Road , Qingdao 266071 , China
| | - Xiangqian Li
- Faculty of Life Science and Food Engineering, Jiangsu Provincial Engineering Laboratory for Biomass Conversion and Process Integration , HuaiYin Institute of Technology , 1 Meicheng East Road , Huaian 223003 , China
| | - Valery A Petrenko
- Department of Pathobiology , Auburn University , 269 Greene Hall , Auburn , Alabama 36849-5519 , United States
| | - Aihua Liu
- Institute for Chemical Biology & Biosensing, and College of Life Sciences , Qingdao University , 308 Ningxia Road , Qingdao 266071 , China
- School of Pharmacy, Medical College , Qingdao University , Qingdao 266021 , China
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Wan J, Guo J, Lu Z, Bie X, Lv F, Zhao H. Development of a test kit for visual loop-mediated isothermal amplification of Salmonella in spiked ready-to-eat fruits and vegetables. J Microbiol Methods 2019; 169:105830. [PMID: 31891738 DOI: 10.1016/j.mimet.2019.105830] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 12/25/2019] [Accepted: 12/27/2019] [Indexed: 02/02/2023]
Abstract
The purpose of this study was to assemble two types of loop-mediated isothermal amplification (LAMP) kit that have the ability to visually detect Salmonella in ready-to-eat fruits and vegetables. The reaction results were obtained within 20-40 min after addition of DNA and can be discerned by the naked eye or an amplification plot. The stability of the LAMP wet kit was evident after multiple freezing and thawing cycles, and the one-step LAMP lyophilized kit was further evolved to allow ambient temperature transport for deployment in resource-limited settings. The cost-effective wet kit had the ability to detect minimum amounts of 1.8 CFU/ml Salmonella DNA without enrichment, while the sensitivity of the one-step LAMP lyophilized kit was only 9.8 × 103 CFU/ml. They both have good anti-interference, as they were both able to detect 2.1 × 102 CFU/ml Salmonella mixed with 106 CFU/ml four non-Salmonella strain mixture. Moreover, cucumber and lettuce that were contaminated with an initial inoculation of 1.7 CFU of Salmonella/10 g showed detection within a reaction time of 30 min after 10 h enrichment. The present research setup is a convenient and practical kit for Salmonella rapid detection that has good application prospects in food safety monitoring.
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Affiliation(s)
- Jiajia Wan
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
| | - Jianping Guo
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
| | - Zhaoxin Lu
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
| | - Xiaomei Bie
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, People's Republic of China.
| | - Fengxia Lv
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
| | - Haizhen Zhao
- College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
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Moezi P, Kargar M, Doosti A, Khoshneviszadeh M. Multiplex touchdown PCR assay to enhance specificity and sensitivity for concurrent detection of four foodborne pathogens in raw milk. J Appl Microbiol 2019; 127:262-273. [PMID: 31002451 DOI: 10.1111/jam.14285] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 04/12/2019] [Accepted: 04/14/2019] [Indexed: 11/30/2022]
Abstract
AIMS The aim of this study was to develop a multiplex touchdown PCR (multiplex TD-PCR) for rapid and simultaneous detection of four major foodborne pathogens to avoid mispriming and unwanted production during gene amplification. Touchdown PCR is the modified form of standard PCR, which enhances specificity, sensitivity. METHODS AND RESULTS For this reason, a multiplex TD-PCR assay with a pre-enrichment step was developed to detect four foodborne pathogens namely Escherichia coli O157:H7, Listeria monocytogenes, Staphylococcus aureus, and Salmonella enterica serovar Enteritidis in pure culture and raw milk samples. The results showed that this protocol can eliminate the unwanted band or reduce significantly. The detection sensitivity of the single and multiplex TD-PCR was one cell per ml in pure culture. Furthermore, the detection limit of multiplex TD-PCR was one cell per 25 ml for artificially contaminated raw milk. We obtained similar results for detection of aforementioned pathogens in raw milk, after comparing the multiplex TD-PCR method with the traditional culture, except in one or two samples. CONCLUSIONS Hence, the proposed multiplex TD-PCR method could be confirmed as an effective way for rapid optimization of PCR reactions to increase specificity, sensitivity during gene amplification. SIGNIFICANCE AND IMPACT OF THE STUDY Hence, due to its simplicity, cost-effectiveness and being time-saving, it seems that this method is reasonable and economical for rapid optimization of PCR reactions.
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Affiliation(s)
- P Moezi
- Department of Microbiology, Jahrom Branch, Islamic Azad University, Jahrom, Iran
| | - M Kargar
- Department of Microbiology, Jahrom Branch, Islamic Azad University, Jahrom, Iran
| | - A Doosti
- Biotechnology Research Center, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran
| | - M Khoshneviszadeh
- Department of Medicinal Chemistry, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
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Zhai L, Li J, Tao T, Lu Z, Lv F, Bie X. Propidium monoazide real-time PCR amplification for viable Salmonella species and Salmonella Heidelberg in pork. Can J Microbiol 2019; 65:477-485. [PMID: 30865841 DOI: 10.1139/cjm-2018-0547] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Salmonella enterica serovar Heidelberg causes foodborne infections and is a major threat to the food chain and public health. In this study, we aimed to develop a rapid molecular typing approach to identify Salmonella enterica serovar Heidelberg. Using comparative genomics, four serovar-specific gene fragments were identified, and a real-time polymerase chain reaction (PCR) combined with a propidium monoazide (PMA) pretreatment method was developed for simultaneous detection of viable Salmonella sp. (invA) and Salmonella Heidelberg (SeHA_C3258). The assay showed 100% specificity for all strains tested. The assay was able to distinguish effectively viable or dead cells with the PMA. The detection limit was 2.4 CFU/mL following 6 h of incubation in enrichment Luria-Bertani medium, and the assay could detect 1.7 × 102 CFU/mL in the presence of pork background flora. In artificially contaminated pork, real-time PCR detected inoculum levels of 1.15 CFU/25 g of pork after a 6 h enrichment. Thus, our findings indicated that this comparative genomics approach could be used to screen for serovar-specific fragments and that real-time PCR with PMA was a simple and reliable method for detecting viability of Salmonella species and Salmonella Heidelberg.
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Affiliation(s)
- Ligong Zhai
- a College of Food Science and Technology, Nanjing Agricultural University, Key Laboratory of Food Processing and Quality Control, Ministry of Agriculture of China, Nanjing, Jiangsu Province, China.,b College of Food Engineering, Anhui Science and Technology University Chuzhou, Anhui Province, China
| | - Junjie Li
- a College of Food Science and Technology, Nanjing Agricultural University, Key Laboratory of Food Processing and Quality Control, Ministry of Agriculture of China, Nanjing, Jiangsu Province, China
| | - Tingting Tao
- a College of Food Science and Technology, Nanjing Agricultural University, Key Laboratory of Food Processing and Quality Control, Ministry of Agriculture of China, Nanjing, Jiangsu Province, China
| | - Zhaoxin Lu
- a College of Food Science and Technology, Nanjing Agricultural University, Key Laboratory of Food Processing and Quality Control, Ministry of Agriculture of China, Nanjing, Jiangsu Province, China
| | - Fengxia Lv
- a College of Food Science and Technology, Nanjing Agricultural University, Key Laboratory of Food Processing and Quality Control, Ministry of Agriculture of China, Nanjing, Jiangsu Province, China
| | - Xiaomei Bie
- a College of Food Science and Technology, Nanjing Agricultural University, Key Laboratory of Food Processing and Quality Control, Ministry of Agriculture of China, Nanjing, Jiangsu Province, China
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Muniandy S, Teh SJ, Thong KL, Thiha A, Dinshaw IJ, Lai CW, Ibrahim F, Leo BF. Carbon Nanomaterial-Based Electrochemical Biosensors for Foodborne Bacterial Detection. Crit Rev Anal Chem 2019; 49:510-533. [DOI: 10.1080/10408347.2018.1561243] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Shalini Muniandy
- Nanotechnology and Catalysis Research Centre, Institute of Graduate Studies, University of Malaya, Kuala Lumpur, Malaysia
- Department of Biomedical Engineering, Centre for Innovation in Medical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
| | - Swe Jyan Teh
- Department of Biomedical Engineering, Centre for Innovation in Medical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
| | - Kwai Lin Thong
- Department of Biomedical Engineering, Centre for Innovation in Medical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
- Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Aung Thiha
- Department of Biomedical Engineering, Centre for Innovation in Medical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
- Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
| | - Ignatius Julian Dinshaw
- Nanotechnology and Catalysis Research Centre, Institute of Graduate Studies, University of Malaya, Kuala Lumpur, Malaysia
- Department of Biomedical Engineering, Centre for Innovation in Medical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
| | - Chin Wei Lai
- Nanotechnology and Catalysis Research Centre, Institute of Graduate Studies, University of Malaya, Kuala Lumpur, Malaysia
- Department of Biomedical Engineering, Centre for Innovation in Medical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
| | - Fatimah Ibrahim
- Department of Biomedical Engineering, Centre for Innovation in Medical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
- Department of Biomedical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
| | - Bey Fen Leo
- Department of Biomedical Engineering, Centre for Innovation in Medical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur, Malaysia
- Central Unit of Advanced Research Imaging, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
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Hameed S, Xie L, Ying Y. Conventional and emerging detection techniques for pathogenic bacteria in food science: A review. Trends Food Sci Technol 2018. [DOI: 10.1016/j.tifs.2018.05.020] [Citation(s) in RCA: 124] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Rapid detection and differentiation of Salmonella species, Salmonella Typhimurium and Salmonella Enteritidis by multiplex quantitative PCR. PLoS One 2018; 13:e0206316. [PMID: 30359449 PMCID: PMC6201931 DOI: 10.1371/journal.pone.0206316] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 10/10/2018] [Indexed: 01/23/2023] Open
Abstract
A multiplex quantitative PCR (qPCR) was developed and evaluated for the simultaneous detection of Salmonella spp., S. enterica serovar Typhimurium and S. enterica serovar Enteritidis in various (food) matrices. Early and fast detection of these pathogens facilitates effective intervention and prevents further distribution of contaminated food products on the market. Three primer and probe sets were designed to target the invA gene, the STM4200 gene, and the SEN1392 gene to detect and differentiate Salmonella spp., S. Typhimurium, and S. Enteritidis, respectively. The multiplex qPCR targeting these three genes was optimized for efficiency and linearity. By testing 225 Salmonella isolates and 34 non-Salmonella isolates from various sources the inclusivity and exclusivity were determined. The inclusivity of the multiplex qPCR was 100% for all Salmonella isolates, including 72 S. Typhimurium isolates, and 53 S. Enteritidis isolates. The exclusivity for Salmonella spp., S. Typhimurium, and S. Enteritidis was 100%, 94.6%, and 100%, respectively. No positive results were reported for non-Salmonella isolates. The limit of detection (LOD) for the qPCR was determined for the matrices poultry, minced meat, egg, herbs/spices, powdered milk, fish, animal feed, boot-socks with chicken feces and chicken down. LOD values for qPCR and the conventional culture methods were similar, except for the matrix boot-socks and down, for which the LOD for the conventional culture methods performed better than the qPCR method. In conclusion, the multiplex qPCR assay developed allows for rapid screening of Salmonella spp., S. Typhimurium, and S. Enteritidis in various (food) matrices.
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Pham QN, Trinh KTL, Jung SW, Lee NY. Microdevice-based solid-phase polymerase chain reaction for rapid detection of pathogenic microorganisms. Biotechnol Bioeng 2018; 115:2194-2204. [PMID: 29777597 PMCID: PMC7161830 DOI: 10.1002/bit.26734] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 05/11/2018] [Accepted: 05/16/2018] [Indexed: 12/14/2022]
Abstract
We demonstrate the integration of DNA amplification and detection functionalities developed on a lab-on-a-chip microdevice utilizing solid-phase polymerase chain reaction (SP-PCR) for point-of-need (PON) DNA analyses. First, the polycarbonate microdevice was fabricated by thermal bonding to contain microchambers as reservoirs for performing SP-PCR. Next, the microchambers were subsequently modified with polyethyleneimine and glutaraldehyde for immobilizing amine-modified forward primers. During SP-PCR, the immobilized forward primers and freely diffusing fluorescence-labeled reverse primers cooperated to generate target amplicons, which remained covalently attached to the microchambers for the fluorescence detection. The SP-PCR microdevice was used for the direct identifications of two widely detected foodborne pathogens, namely Salmonella spp. and Staphylococcus aureus, and an alga causing harmful algal blooms annually in South Korea, Cochlodinium polykrikoides. The SP-PCR microdevice would be versatilely applied in PON testing as a universal platform for the fast identification of foodborne pathogens and environmentally threatening biogenic targets.
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Affiliation(s)
- Quang Nghia Pham
- Department of BioNano Technology, Gachon University, Seongnam-si, Gyeonggi-do, Republic of Korea
| | - Kieu The Loan Trinh
- Department of BioNano Technology, Gachon University, Seongnam-si, Gyeonggi-do, Republic of Korea
| | - Seung Won Jung
- Library of Marine Samples, Korea Institute of Ocean Science and Technology, Geoje, Republic of Korea
| | - Nae Yoon Lee
- Department of BioNano Technology, Gachon University, Seongnam-si, Gyeonggi-do, Republic of Korea
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15
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Arunrut N, Kiatpathomchai W, Ananchaipattana C. Multiplex PCR assay and lyophilization for detection of Salmonella spp., Staphylococcus aureus and Bacillus cereus in pork products. Food Sci Biotechnol 2018; 27:867-875. [PMID: 30263813 DOI: 10.1007/s10068-017-0286-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 10/27/2017] [Accepted: 12/02/2017] [Indexed: 10/18/2022] Open
Abstract
Multiplex PCR (m-PCR) has the potential for more rapid detection of pathogens compared to simple PCR through the simultaneous amplification of multiple gene targets using several sets of specific primers. Here, we developed an m-PCR assay which combined dry reagent mixtures for ready-to-use simultaneous detection of Salmonella spp., Bacillus cereus, and Staphylococcus aureus. The assay did not show cross-reactivity with several common bacterial pathogens and the detection limit was 103 CFU/mL for mixed genomic DNA in pure culture. Lyophilized m-PCR reagents are stable for 2 months stored at 4 °C and for 1 month stored at 25 °C. Detection sensitivities of both dry and fresh mixes were able to simultaneously detect 10 CFU/mL of each pathogen in artificially inoculated samples after enrichment for 6 and 12 h. Results demonstrated that this method is both sensitive and specific and can be used for rapid detection and differentiation of foodborne diseases.
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Affiliation(s)
- Narong Arunrut
- 1Department of Biology, Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi, 39 Muh1, Thanyaburi, Pathum Thani Thailand.,2Bioengineering and Sensing Technology Laboratory, BIOTEC, National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Phahonyothin Rd., Khlong Neung, Khlong Luang, Pathum Thani Thailand
| | - Wansika Kiatpathomchai
- 2Bioengineering and Sensing Technology Laboratory, BIOTEC, National Science and Technology Development Agency (NSTDA), 113 Thailand Science Park, Phahonyothin Rd., Khlong Neung, Khlong Luang, Pathum Thani Thailand
| | - Chiraporn Ananchaipattana
- 1Department of Biology, Faculty of Science and Technology, Rajamangala University of Technology Thanyaburi, 39 Muh1, Thanyaburi, Pathum Thani Thailand
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Umesha S, Manukumar HM. Advanced molecular diagnostic techniques for detection of food-borne pathogens: Current applications and future challenges. Crit Rev Food Sci Nutr 2017; 58:84-104. [PMID: 26745757 DOI: 10.1080/10408398.2015.1126701] [Citation(s) in RCA: 96] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The elimination of disease-causing microbes from the food supply is a primary goal and this review deals with the overall techniques available for detection of food-borne pathogens. Now-a-days conventional methods are replaced by advanced methods like Biosensors, Nucleic Acid-based Tests (NAT), and different PCR-based techniques used in molecular biology to identify specific pathogens. Bacillus cereus, Staphylococcus aureus, Proteus vulgaris, Escherichia coli, Campylobacter, Listeria monocytogenes, Salmonella spp., Aspergillus spp., Fusarium spp., Penicillium spp., and pathogens are detected in contaminated food items that cause always diseases in human in any one or the other way. Identification of food-borne pathogens in a short period of time is still a challenge to the scientific field in general and food technology in particular. The low level of food contamination by major pathogens requires specific sensitive detection platforms and the present area of hot research looking forward to new nanomolecular techniques for nanomaterials, make them suitable for the development of assays with high sensitivity, response time, and portability. With the sound of these, we attempt to highlight a comprehensive overview about food-borne pathogen detection by rapid, sensitive, accurate, and cost affordable in situ analytical methods from conventional methods to recent molecular approaches for advanced food and microbiology research.
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Affiliation(s)
- S Umesha
- a Department of Studies in Biotechnology , University of Mysore, Manasagangotri , Mysore , Karnataka , India
| | - H M Manukumar
- a Department of Studies in Biotechnology , University of Mysore, Manasagangotri , Mysore , Karnataka , India
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17
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Ansari N, Yazdian-Robati R, Shahdordizadeh M, Wang Z, Ghazvini K. Aptasensors for quantitative detection of Salmonella Typhimurium. Anal Biochem 2017. [PMID: 28624297 DOI: 10.1016/j.ab.2017.06.008] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Salmonella is one of the most frequent causes of food borne infectious disease. Among nearly 2500 documented serotypes are reported, Salmonella Typhimurium is the number one serotype associated with salmonellosis worldwide. Many different methods have been developed for the detection and quantification of S. typhimurium. Most of these assays are usually expensive, time consuming and require difficult sample preparation steps. Therefore, it is necessary to develop rapid, robust, cost-effective and sensitive alternative detection methods. In the last years, aptasensors, used for detection of S. typhimurium in different samples. In this review, recent advances and applications of aptasensors for the detection and quantification of S. typhimurium in details have been summarized.
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Affiliation(s)
- Najmeh Ansari
- Department of Microbiology and Virology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Rezvan Yazdian-Robati
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mahin Shahdordizadeh
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Zhouping Wang
- State Key Laboratory of Food Science and Technology, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Kiarash Ghazvini
- Antimicrobial Resistance Research Center, Buali Research Institute, Department of Microbiology and Virology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
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Development of a Polymerase Chain Reaction-Temporal Temperature Gradient Gel Electrophoresis Assay for Identification of Salmonella enterica Subspecies enterica Using a Hypothetical Non-specific Endonucleas S. entericae Gene Sequence. Jundishapur J Microbiol 2017. [DOI: 10.5812/jjm.42021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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19
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Survey of five food-borne pathogens in commercial cold food dishes and their detection by multiplex PCR. Food Control 2016. [DOI: 10.1016/j.foodcont.2015.06.027] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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20
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Duan N, Chang B, Zhang H, Wang Z, Wu S. Salmonella typhimurium detection using a surface-enhanced Raman scattering-based aptasensor. Int J Food Microbiol 2015; 218:38-43. [PMID: 26599860 DOI: 10.1016/j.ijfoodmicro.2015.11.006] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 10/19/2015] [Accepted: 11/14/2015] [Indexed: 12/21/2022]
Abstract
Surface-enhanced Raman spectroscopy (SERS) has been used in a variety of biological applications due to its high sensitivity and specificity. Here, we report a SERS-based aptasensor approach for quantitative detection of pathogenic bacteria. A SERS substrate bearing Au@Ag core/shell nanoparticles (NPs) is functionalized with aptamer 1 (apt 1) for the capture of target molecules. X-rhodamine (ROX)-modified aptamer 2 (apt 2) is used as recognition element and Raman reporter. Salmonella typhimurium specifically interacted with the aptamers to form Au@Ag-apt 1-target-apt 2-ROX sandwich-like complexes. As a result, the concentration of S. typhimurium was determined using this developed aptasensor structure, and a calibration curve is obtained in the range of 15 to 1.5 × 10(6) cfu/mL with a limit of detection of 15 cfu/mL. Our method was successfully applied to real food samples, and the results are consistent with the results obtained using plate counting methods. We believe that the developed method shows potential for the rapid and sensitive detection of pathogenic bacteria in food safety assurance.
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Affiliation(s)
- Nuo Duan
- State Key Laboratory of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Boya Chang
- State Key Laboratory of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Hui Zhang
- China Rural Technology Development Center, Beijing 100045, China
| | - Zhouping Wang
- State Key Laboratory of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China
| | - Shijia Wu
- State Key Laboratory of Food Science and Technology, Synergetic Innovation Center of Food Safety and Nutrition, School of Food Science and Technology, Jiangnan University, Wuxi 214122, China; School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
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21
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da Silva Dantas CC, de Souza EL, Cardoso JD, de Lima LA, de Sousa Oliveira K, Migliolo L, Dias SC, Franco OL, Magnani M. Identification of a napin-like peptide from Eugenia malaccensis L. seeds with inhibitory activity toward Staphylococcus aureus and Salmonella Enteritidis. Protein J 2015; 33:549-56. [PMID: 25362256 DOI: 10.1007/s10930-014-9587-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
This study aimed to purify and characterize peptides from the seeds of Eugenia malaccensis, L. (jambo) with inhibitory activity against the foodborne pathogens Staphylococcus aureus and Salmonella Enteritidis. Crude extract (CE), precipitate fraction 30-60 % and molecules between 3.5 and 10 kDa obtained from precipitate fraction 30-60 % (Em2) showed inhibitory activity against the tested bacterial strains. The highest antibacterial activity was observed for Em2 against S. aureus. The major peak eluted at approximately 30 % in an acetonitrile gradient in reverse-phase chromatography of Em2 (Em2-F1 to Em2-F19), and it showed the highest antibacterial activity, which was twofold higher against S. aureus than against S. Enteritidis. MALDI-ToF spectra of Em2-F18 revealed a molecular mass of 1,231.1 Da and the amino acid sequence showed high identity to the napin family. These findings report for the first time a napin-like peptide from E. malaccensis L. seeds with potential to be applied as a new anti-Staphylococcus molecule.
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Affiliation(s)
- Claudenise Caldas da Silva Dantas
- Laboratory of Microbial Processing in Foods, Department of Food Engineering, Center of Technology, Federal University of Paraíba, João Pessoa, Brazil
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22
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A highly sensitive ELISA and immunochromatographic strip for the detection of Salmonella typhimurium in milk samples. SENSORS 2015; 15:5281-92. [PMID: 25746094 PMCID: PMC4435159 DOI: 10.3390/s150305281] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 02/16/2015] [Accepted: 02/18/2015] [Indexed: 12/14/2022]
Abstract
Murine monoclonal antibodies to target Salmonella typhimurium flagellin and lipopolysaccharide (LPS) were prepared and characterized. For the immunological detection of S. typhimurium, different pairs of monoclonal antibodies (MAbs) were tested in a sandwich enzyme linked immunosorbent assay (ELISA) format. After comparison, a sandwich ELISA and immunochromatographic strip based on LPS MAbs was established to detect S. typhimurium. The determination limits of the immunochromatographic strip in phosphate-buffered saline (PBS) containing 0.1% Tween 20 (PBST) and pure milk sample were found to be 1.25 × 105 colony-forming units (cfu)/mL and 1.25 × 106 cfu/mL S. typhimurium, respectively. Results can be obtained with the naked eye in 10 min. Cross-reactivity was observed with Salmonella paratyphi B, but not S. paratyphi A or Salmonella enteritidis. The LPS MAbs based immunochromatographic strip is rapid and convenient to detect S. typhimurium in milk samples.
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Law JWF, Ab Mutalib NS, Chan KG, Lee LH. Rapid methods for the detection of foodborne bacterial pathogens: principles, applications, advantages and limitations. Front Microbiol 2015; 5:770. [PMID: 25628612 PMCID: PMC4290631 DOI: 10.3389/fmicb.2014.00770] [Citation(s) in RCA: 517] [Impact Index Per Article: 57.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 12/17/2014] [Indexed: 12/11/2022] Open
Abstract
The incidence of foodborne diseases has increased over the years and resulted in major public health problem globally. Foodborne pathogens can be found in various foods and it is important to detect foodborne pathogens to provide safe food supply and to prevent foodborne diseases. The conventional methods used to detect foodborne pathogen are time consuming and laborious. Hence, a variety of methods have been developed for rapid detection of foodborne pathogens as it is required in many food analyses. Rapid detection methods can be categorized into nucleic acid-based, biosensor-based and immunological-based methods. This review emphasizes on the principles and application of recent rapid methods for the detection of foodborne bacterial pathogens. Detection methods included are simple polymerase chain reaction (PCR), multiplex PCR, real-time PCR, nucleic acid sequence-based amplification (NASBA), loop-mediated isothermal amplification (LAMP) and oligonucleotide DNA microarray which classified as nucleic acid-based methods; optical, electrochemical and mass-based biosensors which classified as biosensor-based methods; enzyme-linked immunosorbent assay (ELISA) and lateral flow immunoassay which classified as immunological-based methods. In general, rapid detection methods are generally time-efficient, sensitive, specific and labor-saving. The developments of rapid detection methods are vital in prevention and treatment of foodborne diseases.
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Affiliation(s)
- Jodi Woan-Fei Law
- Jeffrey Cheah School of Medicine and Health Sciences, Monash University MalaysiaSelangor Darul Ehsan, Malaysia
- School of Science, Monash University MalaysiaSelangor Darul Ehsan, Malaysia
| | - Nurul-Syakima Ab Mutalib
- UKM Medical Molecular Biology Institute (UMBI), UKM Medical Centre, Bandar Tun RazakKuala Lumpur, Malaysia
| | - Kok-Gan Chan
- Division of Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of MalayaKuala Lumpur, Malaysia
| | - Learn-Han Lee
- Jeffrey Cheah School of Medicine and Health Sciences, Monash University MalaysiaSelangor Darul Ehsan, Malaysia
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Zhai L, Yu Q, Bie X, Lu Z, Lv F, Zhang C, Kong X, Zhao H. Development of a PCR test system for specific detection of Salmonella Paratyphi B in foods. FEMS Microbiol Lett 2014; 355:83-9. [PMID: 24725227 DOI: 10.1111/1574-6968.12443] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Revised: 04/10/2014] [Accepted: 04/10/2014] [Indexed: 01/02/2023] Open
Abstract
Salmonella enterica serotype Paratyphi B is a globally distributed human-specific pathogen causing paratyphoid fever. The aim of this study was to develop a rapid and reliable polymerase chain reaction (PCR) assay for its detection in food. The SPAB_01124 gene was found to be unique to S. Paratyphi B using comparative genomics. Primers for fragments of the SPAB_01124 gene and the Salmonella-specific invA gene were used in combination to establish a multiplex PCR assay that showed 100% specificity across 45 Salmonella strains (representing 34 serotypes) and 18 non-Salmonella strains. The detection limit was 2.2 CFU mL(-1) of S. Paratyphi B after 12-h enrichment in pure culture. It was shown that co-culture with S. Typhimurium or Escherichia coli up to concentrations of 3.6 × 10(5) CFU and 3.3 × 10(4) CFU, respectively, did not interfere with PCR detection of S. Paratyphi B. In artificially contaminated milk, the assay could detect as few as 62 CFU mL(-1) after 8 h of enrichment. In conclusion, comparative genomics was found to be an efficient approach to the mining of pathogen-specific target genes, and the PCR assay that was developed from this provided a rapid, specific, and sensitive method for detection of S. Paratyphi B.
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Affiliation(s)
- Ligong Zhai
- College of Food Science and Technology, Nanjing Agricultural University, Key Laboratory of Food Processing and Quality Control, Ministry of Agriculture of China, Nanjing, China
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Huang KH, Hsu BM, Chou MY, Tsai HL, Kao PM, Wang HJ, Hsiao HY, Su MJ, Huang YL. Application of molecular biological techniques to analyze Salmonella seasonal distribution in stream water. FEMS Microbiol Lett 2014; 352:87-96. [PMID: 24417320 DOI: 10.1111/1574-6968.12381] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Revised: 12/27/2013] [Accepted: 12/28/2013] [Indexed: 11/28/2022] Open
Abstract
Salmonella is a leading cause of waterborne diseases. Salmonella can survive for a long time in aquatic environments, and its persistence in the environment is of great concern to public health. Nonetheless, the presence and diversity of Salmonella in the aquatic environments in most areas remain relatively unknown. In this study, we examined three analytical processes for an optimum Salmonella detection method, and the optimized method was used to evaluate seasonal variations of Salmonella in aquatic environments. In addition, Salmonella strains were isolated by selective culture medium to identify the serotypes by biochemical testing and serological assay, and to identify the genotypes by pulsed-field gel electrophoresis based on the genetic patterns. A total of 136 water samples were collected in the study area in 9 months. Forty-one (30.1%) samples were found to contain Salmonella-specific invA gene, and most (24/41) of the detections occurred in summer. The serovars of Salmonella enterica were identified, including Bareilly, Isangi, Newport, Paratyphi B var. Java, Potsdam and Typhimurium.
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Affiliation(s)
- Kuan-Hao Huang
- Department of Earth and Environmental Sciences, National Chung Cheng University, Chiayi, Taiwan, Republic of China
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Frausto HSEG, Alves J, Oliveira TCRMD. Evaluation of the BAX® system for the detection of Salmonella spp. in naturally contaminated chicken meat. FOOD SCIENCE AND TECHNOLOGY 2013. [DOI: 10.1590/s0101-20612013005000056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Harissa Silvério El Ghoz Frausto
- Universidade Estadual de Londrina, Brasil; Setor de Microbiologia do Laboratório São Camilo de Análises de Alimentos e Água, Brasil
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