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Mostajabodavati S, Mousavizadegan M, Hosseini M, Mohammadimasoudi M, Mohammadi J. Machine learning-assisted liquid crystal-based aptasensor for the specific detection of whole-cell Escherichia coli in water and food. Food Chem 2024; 448:139113. [PMID: 38552467 DOI: 10.1016/j.foodchem.2024.139113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2023] [Revised: 03/19/2024] [Accepted: 03/20/2024] [Indexed: 04/24/2024]
Abstract
We have developed a rapid, facile liquid crystal (LC)-based aptasensor for E. coli detection in water and juice samples. A textile grid-anchored LC platform was used with specific aptamers adsorbed via a cationic surfactant, cetyltrimethylammonium bromide (CTAB), on the LC surface. The presence of E. coli dissociates the aptamers from CTAB and restores the dark signal induced by the surfactant. Using polarized microscopy, the images of the LCs in the presence of various concentrations of E. coli were captured and analyzed using image analysis and machine learning (ML). The artificial neural networks (ANN) and extreme gradient boosting (XGBoost) rendered the best results for water samples (R2 = 0.986 and RMSE = 0.209) and juice samples (R2 = 0.976 and RMSE = 0.262), respectively. The platform was able to detect E. coli with a detection limit (LOD) of 6 CFU mL-1.
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Affiliation(s)
- Saba Mostajabodavati
- Nanobiosensors Lab, Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran 1439817435, Iran
| | - Maryam Mousavizadegan
- Nanobiosensors Lab, Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran 1439817435, Iran
| | - Morteza Hosseini
- Nanobiosensors Lab, Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran 1439817435, Iran; Department of Pharmaceutical Biomaterials, Medical Biomaterials Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran.
| | - Mohammad Mohammadimasoudi
- Nano-bio-photonics Laboratory, Faculty of New Sciences and Technologies, University of Tehran, Tehran 1439817435, Iran
| | - Javad Mohammadi
- Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran 1439817435, Iran
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2
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Quintela IA, Vasse T, Lin CS, Wu VCH. Advances, applications, and limitations of portable and rapid detection technologies for routinely encountered foodborne pathogens. Front Microbiol 2022; 13:1054782. [PMID: 36545205 PMCID: PMC9760820 DOI: 10.3389/fmicb.2022.1054782] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 11/17/2022] [Indexed: 12/08/2022] Open
Abstract
Traditional foodborne pathogen detection methods are highly dependent on pre-treatment of samples and selective microbiological plating to reliably screen target microorganisms. Inherent limitations of conventional methods include longer turnaround time and high costs, use of bulky equipment, and the need for trained staff in centralized laboratory settings. Researchers have developed stable, reliable, sensitive, and selective, rapid foodborne pathogens detection assays to work around these limitations. Recent advances in rapid diagnostic technologies have shifted to on-site testing, which offers flexibility and ease-of-use, a significant improvement from traditional methods' rigid and cumbersome steps. This comprehensive review aims to thoroughly discuss the recent advances, applications, and limitations of portable and rapid biosensors for routinely encountered foodborne pathogens. It discusses the major differences between biosensing systems based on the molecular interactions of target analytes and biorecognition agents. Though detection limits and costs still need further improvement, reviewed technologies have high potential to assist the food industry in the on-site detection of biological hazards such as foodborne pathogens and toxins to maintain safe and healthy foods. Finally, this review offers targeted recommendations for future development and commercialization of diagnostic technologies specifically for emerging and re-emerging foodborne pathogens.
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Affiliation(s)
- Irwin A. Quintela
- Produce Safety and Microbiology Research Unit, U.S. Department of Agriculture, Agricultural Research Service, Western Regional Research Center, Albany, CA, United States
| | - Tyler Vasse
- Produce Safety and Microbiology Research Unit, U.S. Department of Agriculture, Agricultural Research Service, Western Regional Research Center, Albany, CA, United States
| | - Chih-Sheng Lin
- Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu, Taiwan,Department of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan,Center for Intelligent Drug Systems and Smart Bio-devices (IDS2B), National Yang Ming Chiao Tung University, Hsinchu, Taiwan
| | - Vivian C. H. Wu
- Produce Safety and Microbiology Research Unit, U.S. Department of Agriculture, Agricultural Research Service, Western Regional Research Center, Albany, CA, United States,*Correspondence: Vivian C. H. Wu,
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3
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Khan S, Akrema, Qazi S, Ahmad R, Raza K, Rahisuddin. In Silico and Electrochemical Studies for a ZnO-CuO-Based Immunosensor for Sensitive and Selective Detection of E. coli. ACS OMEGA 2021; 6:16076-16085. [PMID: 34179653 PMCID: PMC8223399 DOI: 10.1021/acsomega.1c01959] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 06/01/2021] [Indexed: 12/04/2023]
Abstract
Escherichia coli is a harmful Gram-negative bacterium commonly found in the gut of warm-blooded organisms and affects millions of people annually worldwide. In this study, we have synthesized a ZnO-CuO nanocomposite (NC) by a co-precipitation method and characterized the as-synthesized NC using FTIR spectroscopy, XRD, Raman spectroscopy, and FESEM techniques. To fabricate the immunosensor, the ZnO-CuO NC composite was screen-printed on gold-plated electrodes followed by physisorption of the anti-LPS E. coli antibody. The biosensor was optimized for higher specificity and sensitivity. The immunosensor exhibited a high sensitivity (11.04 μA CFU mL-1) with a low detection limit of 2 CFU mL-1 with a redox couple. The improved performance of the immunosensor is attributed to the synergistic effect of the NC and the antilipopolysaccharide antibody against E. coli. The selectivity studies were also carried out with Staphylococcus aureus to assess the specificity of the immunosensor. Testing in milk samples was done by spiking the milk samples with different concentrations of E. coli to check the potential of this immunosensor. We further checked the affinity between ZnO-CuO NC with E. coli LPS and the anti-LPS antibody using molecular docking studies. Atomic charge computation and interaction analyses were performed to support our hypothesis. Our results discern that there is a strong correlation between molecular docking studies and electrochemical characterization. The interaction analysis further displays the strong affinity between the antibody-LPS complex when immobilized with a nanoparticle composite (ZnO-CuO).
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Affiliation(s)
- Summaiyya Khan
- Department
of Chemistry, Jamia Millia Islamia, New Delhi 110025, India
| | - Akrema
- Department
of Chemistry, Jamia Millia Islamia, New Delhi 110025, India
| | - Sahar Qazi
- Department
of Computer Science, Jamia Millia Islamia, New Delhi 110025, India
| | - Rafiq Ahmad
- Centre
for Nanoscience and Nanotechnology, Jamia
Millia Islamia, New Delhi 110025, India
| | - Khalid Raza
- Department
of Computer Science, Jamia Millia Islamia, New Delhi 110025, India
| | - Rahisuddin
- Department
of Chemistry, Jamia Millia Islamia, New Delhi 110025, India
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4
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Modernization of Control of Pathogenic Micro-Organisms in the Food-Chain Requires a Durable Role for Immunoaffinity-Based Detection Methodology-A Review. Foods 2021; 10:foods10040832. [PMID: 33920486 PMCID: PMC8069916 DOI: 10.3390/foods10040832] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 03/28/2021] [Accepted: 04/02/2021] [Indexed: 01/03/2023] Open
Abstract
Food microbiology is deluged by a vastly growing plethora of analytical methods. This review endeavors to color the context into which methodology has to fit and underlines the importance of sampling and sample treatment. The context is that the highest risk of food contamination is through the animal and human fecal route with a majority of foodborne infections originating from sources in mass and domestic kitchens at the end of the food-chain. Containment requires easy-to-use, failsafe, single-use tests giving an overall risk score in situ. Conversely, progressive food-safety systems are relying increasingly on early assessment of batches and groups involving risk-based sampling, monitoring environment and herd/flock health status, and (historic) food-chain information. Accordingly, responsible field laboratories prefer specificity, multi-analyte, and high-throughput procedures. Under certain etiological and epidemiological circumstances, indirect antigen immunoaffinity assays outperform the diagnostic sensitivity and diagnostic specificity of e.g., nucleic acid sequence-based assays. The current bulk of testing involves therefore ante- and post-mortem probing of humoral response to several pathogens. In this review, the inclusion of immunoglobulins against additional invasive micro-organisms indicating the level of hygiene and ergo public health risks in tests is advocated. Immunomagnetic separation, immunochromatography, immunosensor, microsphere array, lab-on-a-chip/disc platforms increasingly in combination with nanotechnologies, are discussed. The heuristic development of portable and ambulant microfluidic devices is intriguing and promising. Tant pis, many new platforms seem unattainable as the industry standard. Comparability of results with those of reference methods hinders the implementation of new technologies. Whatever the scientific and technological excellence and incentives, the decision-maker determines this implementation after weighing mainly costs and business risks.
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Klass SH, Sofen LE, Hallberg ZF, Fiala TA, Ramsey AV, Dolan NS, Francis MB, Furst AL. Covalent capture and electrochemical quantification of pathogenic E. coli. Chem Commun (Camb) 2021; 57:2507-2510. [PMID: 33585846 PMCID: PMC9274617 DOI: 10.1039/d0cc08420d] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2023]
Abstract
Pathogenic E. coli pose a significant threat to public health, as strains of this species cause both foodborne illnesses and urinary tract infections. Using a rapid bioconjugation reaction, we selectively capture E. coli at a disposable gold electrode from complex solutions and accurately quantify the pathogenic microbes using electrochemical impedance spectroscopy.
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Affiliation(s)
- Sarah H Klass
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Laura E Sofen
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Zachary F Hallberg
- Department of Plant and Microbial Biology, University of California, Berkeley, California 94720, USA
| | - Tahoe A Fiala
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Alexandra V Ramsey
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Nicholas S Dolan
- Department of Chemistry, University of California, Berkeley, California 94720, USA
| | - Matthew B Francis
- Department of Chemistry, University of California, Berkeley, California 94720, USA and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Ariel L Furst
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
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Quintela IA, Wu VCH. A sandwich-type bacteriophage-based amperometric biosensor for the detection of Shiga toxin-producing Escherichia coli serogroups in complex matrices. RSC Adv 2020; 10:35765-35775. [PMID: 35517084 PMCID: PMC9056931 DOI: 10.1039/d0ra06223e] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 09/15/2020] [Indexed: 12/19/2022] Open
Abstract
Immuno-based biosensors are a popular tool designed for pathogen screening and detection. The current antibody-based biosensors employ direct, indirect, or sandwich detection approaches; however, instability, cross-reactivity, and high-cost render them unreliable and impractical. To circumvent these drawbacks, here we report a portable sandwich-type bacteriophage-based amperometric biosensor, which is highly-specific to various Shiga toxin-producing Escherichia coli (STEC) serogroups. Environmentally isolated and biotinylated bacteriophages were directly immobilized onto a streptavidin-coated screen-printed carbon electrode (SPCE), which recognized and captured viable target cells. Samples (50 μL) were transferred to these bacteriophage-functionalized SPCEs (12 min, room temp) before sequentially adding a bacteriophage–gold nanoparticle solution (20 μL), H2O2 (40 mM), and 1,1′-ferrocenedicarboxylic acid for amperometric tests (100 mV s−1) and analysis (ANOVA and LSD, P < 0.05). The optimum biotin concentration (10 mM) retained 94.47% bacteriophage viability. Non-target bacteria (Listeria monocytogenes and Salmonella Typhimurium) had delta currents below the threshold of a positive detection. With less than 1 h turn-around time, the amperometric biosensor had a detection limit of 10–102 CFU mL−1 for STEC O157, O26, and O179 strains and R2 values of 0.97, 0.99, and 0.87, respectively, and a similar detection limit was observed in complex matrices, 10–102 CFU g−1 or mL−1 with R2 values of 0.98, 0.95, and 0.76, respectively. The newly developed portable amperometric biosensor was able to rapidly detect viable target cells at low inoculum levels, thus providing an inexpensive and improved alternative to the current immuno- and laboratory-based STEC screening methods. Sandwich-type bacteriophage-based amperometric biosensor for the detection of Shiga toxin-producing Escherichia coli serogroups in complex matrices.![]()
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Affiliation(s)
- Irwin A Quintela
- Produce Safety and Microbiology Research Unit, US Department of Agriculture, Agricultural Research Services, Western Regional Research Center Albany California USA
| | - Vivian C H Wu
- Produce Safety and Microbiology Research Unit, US Department of Agriculture, Agricultural Research Services, Western Regional Research Center Albany California USA
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7
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Shen J, Zhou T, Huang R. Recent Advances in Electrochemiluminescence Sensors for Pathogenic Bacteria Detection. MICROMACHINES 2019; 10:mi10080532. [PMID: 31412540 PMCID: PMC6723614 DOI: 10.3390/mi10080532] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Revised: 08/04/2019] [Accepted: 08/06/2019] [Indexed: 12/13/2022]
Abstract
Pathogenic bacterial contamination greatly threats human health and safety. Rapidly biosensing pathogens in the early stage of infection would be helpful to choose the correct drug treatment, prevent transmission of pathogens, as well as decrease mortality and economic losses. Traditional techniques, such as polymerase chain reaction and enzyme-linked immunosorbent assay, are accurate and effective, but are greatly limited because they are complex and time-consuming. Electrochemiluminescence (ECL) biosensors combine the advantages of both electrochemical and photoluminescence analysis and are suitable for high sensitivity and simple pathogenic bacteria detection. In this review, we summarize recent advances in ECL sensors for pathogenic bacteria detection and highlight the development of paper-based ECL platforms in point of care diagnosis of pathogens.
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Affiliation(s)
- Jinjin Shen
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China
| | - Ting Zhou
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China
| | - Ru Huang
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, China.
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8
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Zhang Y, Zhu L, He P, Zi F, Hu X, Wang Q. Sensitive assay of Escherichia coli in food samples by microchip capillary electrophoresis based on specific aptamer binding strategy. Talanta 2019; 197:284-290. [PMID: 30771937 DOI: 10.1016/j.talanta.2019.01.040] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 01/07/2019] [Accepted: 01/09/2019] [Indexed: 11/30/2022]
Abstract
The rapid and cost-effective detection of bacteria is of great importance to ensuring food safety, preventing food poisoning. Herein, we developed a sensitive detection of Escherichia coli (E. coli) using bacteria-specific aptamer in conjunction with microchip capillary electrophoresis-coupled laser-induced fluorescence (MCE-LIF). Based on the differences between charge to mass ratios of free aptamer and bacteria-aptamer complex, which influence their electrophoretic mobilities, the separation of free aptamers and complex peaks by MCE could be achieved. Under optimal conditions, the sensitive detection of E. coli was achieved with a detection limit of 3.7 × 102 CFU mL-1, at a fast response of 135 s and a short detection length of 2.3 cm. The spiked recovery experiment showed that E. coli could be recovered from spiked drinking water and milk samples with recovery rates of 94.7% and 92.8%, respectively. This work demonstrates that the established detection strategy can be a useful tool for the detection and/or monitoring of E. coli in food and environment.
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Affiliation(s)
- Yan Zhang
- Faculty of Science, Kunming University of Science and Technology, Kunming 650500, China; School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Luqi Zhu
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Pingang He
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Futing Zi
- Faculty of Science, Kunming University of Science and Technology, Kunming 650500, China
| | - Xianzhi Hu
- Faculty of Science, Kunming University of Science and Technology, Kunming 650500, China.
| | - Qingjiang Wang
- School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China.
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9
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Priyanka B, Patil RK, Dwarakanath S. A review on detection methods used for foodborne pathogens. Indian J Med Res 2017; 144:327-338. [PMID: 28139531 PMCID: PMC5320838 DOI: 10.4103/0971-5916.198677] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Foodborne pathogens have been a cause of a large number of diseases worldwide and more so in developing countries. This has a major economic impact. It is important to contain them, and to do so, early detection is very crucial. Detection and diagnostics relied on culture-based methods to begin with and have developed in the recent past parallel to the developments towards immunological methods such as enzyme-linked immunosorbent assays (ELISA) and molecular biology-based methods such as polymerase chain reaction (PCR). The aim has always been to find a rapid, sensitive, specific and cost-effective method. Ranging from culturing of microbes to the futuristic biosensor technology, the methods have had this common goal. This review summarizes the recent trends and brings together methods that have been developed over the years.
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Affiliation(s)
- B Priyanka
- Department of Applied Zoology, Mangalore University, Mangaluru, India
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10
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Highly sensitive Escherichia coli shear horizontal surface acoustic wave biosensor with silicon dioxide nanostructures. Biosens Bioelectron 2017; 93:146-154. [DOI: 10.1016/j.bios.2016.09.035] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2016] [Revised: 08/25/2016] [Accepted: 09/10/2016] [Indexed: 11/20/2022]
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The Development of a Portable SPR Bioanalyzer for Sensitive Detection of Escherichia coli O157:H7. SENSORS 2016; 16:s16111856. [PMID: 27827923 PMCID: PMC5134515 DOI: 10.3390/s16111856] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 10/18/2016] [Accepted: 11/01/2016] [Indexed: 11/29/2022]
Abstract
The purpose of this study was to develop a portable surface plasmon resonance (SPR) bioanalyzer for the sensitive detection of Escherichia coli O157:H7 in comparison with an enzyme-linked immunosorbent assay (ELISA). The experimental setup mainly consisted of an integrated biosensor and a homemade microfluidic cell with a three-way solenoid valve. In order to detect Escherichia coli O157:H7 using the SPR immunoassay, 3-mercaptopropionic acid (3-MPA) was chemisorbed onto a gold surface via covalent bond for the immobilization of biological species. 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride (EDC) and N-hydroxysuccinimide (NHS) were used as crosslinker reagents to enable the reaction between 3-MPA and Escherichia coli O157:H7 antibodies by covalent –CO–NH– amide bonding. The experimental results were obtained from the Escherichia coli O157:H7 positive samples prepared by 10-, 20-, 40-, 80-, and 160-fold dilution respectively, which show that a good linear relationship with the correlation coefficient R of 0.982 existed between the response units from the portable SPR bioanalyzer and the concentration of Escherichia coli O157:H7 positive samples. Moreover, the theoretical detection limit of 1.87 × 103 cfu/mL was calculated from the positive control samples. Compared with the Escherichia coli O157:H7 ELISA kit, the sensitivity of this portable SPR bioanalyzer is four orders of magnitude higher than the ELISA kit. The results demonstrate that the portable SPR bioanalyzer could provide an alternative method for the quantitative and sensitive determination of Escherichia coli O157:H7 in field.
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Poltronieri P, Mezzolla V, Primiceri E, Maruccio G. Biosensors for the Detection of Food Pathogens. Foods 2014; 3:511-526. [PMID: 28234334 PMCID: PMC5302249 DOI: 10.3390/foods3030511] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Revised: 08/18/2014] [Accepted: 08/20/2014] [Indexed: 01/09/2023] Open
Abstract
Food pathogens frequently cause foodborne diseases. There is a need to rapidly identify the source of the bacteria in order to contain their spread and epidemics. A pre-enrichment culture or a direct culture on agar plate are standard microbiological methods. In this review, we present an update on alternative molecular methods to nucleic acid-based detection for species identification. Biosensor-based methods rely on the recognition of antigen targets or receptors by antibodies, aptamers or high-affinity ligands. The captured antigens may be then directly or indirectly detected through an antibody or high-affinity and high-specificity recognition molecule. Various different detection methods are discussed, from label-free sensors and immunosensors to fluorescence-based ones. Each method shows advantages and disadvantages in terms of equipment, sensitivity, simplicity and cost-effectiveness. Finally, lab-on-a-chip (LOC) devices are introduced briefly, with the potential to be fast, sensitive and useful for on-site bacteria detection in food processing laboratories to check potential contamination by sample monitoring combined with a rapid pre-enrichment step.
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Affiliation(s)
- Palmiro Poltronieri
- Institute of Sciences of Food Productions, National Research Council, ISPA-CNR, Via Lecce-Monteroni, 73100 Lecce, Italy.
| | - Valeria Mezzolla
- Institute of Sciences of Food Productions, National Research Council, ISPA-CNR, Via Lecce-Monteroni, 73100 Lecce, Italy.
| | - Elisabetta Primiceri
- NNL, Institute of Nanoscience-CNR, Via per Arnesano, I-73100 Lecce, Italy.
- Department of Mathematics and Physics "Ennio De Giorgi", University of Salento, Via per Arnesano, I-73100 Lecce, Italy.
| | - Giuseppe Maruccio
- NNL, Institute of Nanoscience-CNR, Via per Arnesano, I-73100 Lecce, Italy.
- Department of Mathematics and Physics "Ennio De Giorgi", University of Salento, Via per Arnesano, I-73100 Lecce, Italy.
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13
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Magaña S, Schlemmer SM, Davidson GR, Ryser ET, Lim DV. Laboratory and pilot-scale dead-end ultrafiltration concentration of sanitizer-free and chlorinated lettuce wash water for improved detection of Escherichia coli O157:H7. J Food Prot 2014; 77:1260-8. [PMID: 25198586 DOI: 10.4315/0362-028x.jfp-13-421] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
An automated dead-end (single pass, no recirculation) ultrafiltration device, the Portable Multi-use Automated Concentration System (PMACS), was evaluated as a means to concentrate Escherichia coli O157:H7 from 40 liters of simulated commercial lettuce wash water. The assessment included generating, sieving, and concentrating sanitizer-free lettuce wash water, either uninoculated or inoculated with green fluorescent protein-transformed E. coli O157:H7 at a high (1.00 log CFU/ml) or low (-1.00 log CFU/ml) concentration. Cells collected within the filters were recovered in approximately 400 ml of buffer to create lettuce wash retentates. The extent of concentration was determined by viable plate counts using a medium selective for the transformed E. coli O157:H7. The samples were qualitatively analyzed for E. coli O157:H7 according to the U. S. Food and Drug Administration Bacteriological Analytical Manual enrichment method and with an electrochemiluminescence immunoassay. This concentration method was then evaluated in a pilot-scale production line at Michigan State University using chlorinated (100, 30, and 10 ppm of available chlorine) lettuce wash water. The total PMACS processing times were 82 ± 6 and 65 ± 5 min for sanitizer-free and chlorinated washes, respectively. Overall, E. coli O157:H7 populations were approximately 2 log higher in retentates than in unconcentrated lettuce wash samples. The higher E. coli O157:H7 levels in the retentates enabled cultural and electrochemiluminescence immunoassay detection in some samples when the corresponding lettuce wash samples were negative. When combined with standard and rapid detection methods, the PMACS concentration method may provide a means to enhance pathogen monitoring of produce wash water.
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Affiliation(s)
- Sonia Magaña
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, 4202 East Fowler Avenue, ISA2015, Tampa, Florida 33620-7115, USA
| | - Sarah M Schlemmer
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, 4202 East Fowler Avenue, ISA2015, Tampa, Florida 33620-7115, USA
| | - Gordon R Davidson
- Department of Food Science and Human Nutrition, Michigan State University, 469 Wilson Road, East Lansing, Michigan 48824-1225, USA; Department of Food Science and Technology, University of California-Davis, Davis, CA 95616, USA
| | - Elliot T Ryser
- Department of Food Science and Human Nutrition, Michigan State University, 469 Wilson Road, East Lansing, Michigan 48824-1225, USA
| | - Daniel V Lim
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, 4202 East Fowler Avenue, ISA2015, Tampa, Florida 33620-7115, USA.
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14
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Photobleaching with phloxine B sensitizer to reduce food matrix interference for detection of Escherichia coli serotype O157:H7 in fresh spinach by flow cytometry. Food Microbiol 2013; 36:416-25. [PMID: 24010624 DOI: 10.1016/j.fm.2013.07.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Revised: 04/09/2013] [Accepted: 07/17/2013] [Indexed: 02/05/2023]
Abstract
A flow cytometric method (RAPID-B™) with detection sensitivity of one viable cell of Escherichia coli serotype O157:H7 in fresh spinach (Spinacia oleracea) was developed and evaluated. The major impediment to achieving this performance was mistaking autofluorescing spinach particles for tagged target cells. Following a 5 h non-selective enrichment, artificially inoculated samples were photobleached, using phloxine B as a photosensitizer. Samples were centrifuged at high speed to concentrate target cells, then gradient centrifuged to separate them from matrix debris. In external laboratory experiments, RAPID-B and the reference method both correctly detected E. coli O157:H7 at inoculations of ca. 15 cells. In a follow-up study, after 4 cell inoculations of positives and 6 h enrichment, RAPID-B correctly identified 92% of 25 samples. The RAPID-B method limit of detection (LOD) was one cell in 25 g. It proved superior to the reference method (which incorporated real time-PCR, selective enrichment, and culture plating elements) in accuracy and speed.
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15
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Das AP, Kumar PS, Swain S. Recent advances in biosensor based endotoxin detection. Biosens Bioelectron 2013; 51:62-75. [PMID: 23934306 DOI: 10.1016/j.bios.2013.07.020] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Revised: 06/28/2013] [Accepted: 07/11/2013] [Indexed: 12/20/2022]
Abstract
Endotoxins also referred to as pyrogens are chemically lipopolysaccharides habitually found in food, environment and clinical products of bacterial origin and are unavoidable ubiquitous microbiological contaminants. Pernicious issues of its contamination result in high mortality and severe morbidities. Standard traditional techniques are slow and cumbersome, highlighting the pressing need for evoking agile endotoxin detection system. The early and prompt detection of endotoxin assumes prime importance in health care, pharmacological and biomedical sectors. The unparalleled recognition abilities of LAL biosensors perched with remarkable sensitivity, high stability and reproducibility have bestowed it with persistent reliability and their possible fabrication for commercial applicability. This review paper entails an overview of various trends in current techniques available and other possible alternatives in biosensor based endotoxin detection together with its classification, epidemiological aspects, thrust areas demanding endotoxin control, commercially available detection sensors and a revolutionary unprecedented approach narrating the influence of omics for endotoxin detection.
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Affiliation(s)
- A P Das
- Bioengineering Laboratory, Centre of Biotechnology, Siksha O Anusandhan University, Bhubaneswar, India.
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Magaña S, Schlemmer SM, Leskinen SD, Kearns EA, Lim DV. Automated dead-end ultrafiltration for concentration and recovery of total coliform bacteria and laboratory-spiked Escherichia coli O157:H7 from 50-liter produce washes to enhance detection by an electrochemiluminescence immunoassay. J Food Prot 2013; 76:1152-60. [PMID: 23834789 DOI: 10.4315/0362-028x.jfp-12-285] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
An automated concentration system (ACS) based on dead-end ultrafiltration was used in this study to concentrate bacteria, including Escherichia coli O157:H7, from 50-liter produce washes (PWs, sieved produce wash). Cells trapped in the filters were recovered in approximately 400 ml of buffer to create PW retentates (PWRs). Extent of concentration was determined by analyzing PWs and PWRs for total coliform bacteria and E. coli O157:H7 using standard methods. In addition, an electrochemiluminescence immunoassay was evaluated for detection of E. coli O157:H7 in spiked PWs and PWRs to demonstrate usefulness of the ACS for same-day detection. The levels of total coliform bacteria and E. coli O157:H7 in PWRs were higher than those in PWs by 1.85 ± 0.41 log most probable number per 100 ml and 1.82 ± 0.24 log CFU/ml, respectively. Electrochemiluminescence detection of E. coli O157:H7 was accomplished within 2 h using ACS concentration of lettuce and spinach wash water artificially spiked with the pathogen at levels as low as 0.36 log CFU/ml and 1.39 log CFU/ml, respectively. Detection of E. coli O157:H7 at -0.93 ± 0.15 log CFU/ml in lettuce wash occurred within approximately 6 h when a 4-h enrichment step was added to the procedure. Use of dead-end ultrafiltration increased bacterial concentrations in PWR and allowed same-day detection of low levels of E. coli O157:H7 in PW. This concentration system could be useful to improve the sensitivity of current rapid methods for detection of low levels of foodborne pathogens in PW water.
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Affiliation(s)
- Sonia Magaña
- Department of Cell Biology, Microbiology and Molecular Biology, University of South Florida, 4202 East Fowler Avenue, ISA2015, Tampa, Florida 33620-7115, USA
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Antal-Szalmás P, Nagy B, Debreceni IB, Kappelmayer J. Measurement of Soluble Biomarkers by Flow Cytometry. EJIFCC 2013; 23:135-42. [PMID: 27683429 PMCID: PMC4975309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Microparticle based flow cytometric assays for determination of the level of soluble biomarkers are widely used in several research applications and in some diagnostic setups. The major advantages of these multiplex systems are that they can measure a large number of analytes (up to 500) at the same time reducing assay time, costs and sample volume. Most of these assays are based on antigen-antibody interactions and work as traditional immunoassays, but nucleic acid alterations - by using special hybridization probes -, enzyme- substrate or receptor-ligand interactions can be also studied with them. The applied beads are nowadays provided by the manufacturers, but cheaper biological microbeads can be prepared by any user. One part of the systems can be used on any research or clinical cytometers, but some companies provide dedicated analyzers for their multiplex bead arrays. Due to the high standardization of the bead production and the preparation of the assay components the analytical properties of these assays are quite reliable with a wide range of available applications. Cytokines, intracellular fusion proteins, activated/phosphorylated components of different signaling pathways, transcription factors and nuclear receptors can be identified and quantitated. The assays may serve the diagnostics of autoimmune disorders, different viral and bacterial infections, as well as genetic alterations such as single nucleotide polymorphisms, small deletions/insertions or even nucleotide triplet expansions can be also identified. The most important principles, technical details and applications of these systems are discussed in this short review.
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Affiliation(s)
- Péter Antal-Szalmás
- Department of Laboratory Medicine, Medical and Health Science Center, University of Debrecen, Hungary +36 52-340-006+36 52-417-631
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Kirsch J, Siltanen C, Zhou Q, Revzin A, Simonian A. Biosensor technology: recent advances in threat agent detection and medicine. Chem Soc Rev 2013; 42:8733-68. [DOI: 10.1039/c3cs60141b] [Citation(s) in RCA: 313] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Farahi RH, Passian A, Tetard L, Thundat T. Critical issues in sensor science to aid food and water safety. ACS NANO 2012; 6:4548-4556. [PMID: 22564109 DOI: 10.1021/nn204999j] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The stability of food and water supplies is widely recognized as a global issue of fundamental importance. Sensor development for food and water safety by nonconventional assays continues to overcome technological challenges. The delicate balance between attaining adequate limits of detection, chemical fingerprinting of the target species, dealing with the complex food matrix, and operating in difficult environments are still the focus of current efforts. While the traditional pursuit of robust recognition methods remains important, emerging engineered nanomaterials and nanotechnology promise better sensor performance but also bring about new challenges. Both advanced receptor-based sensors and emerging non-receptor-based physical sensors are evaluated for their critical challenges toward out-of-laboratory applications.
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Affiliation(s)
- R H Farahi
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6123, USA
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Roda A, Mirasoli M, Roda B, Bonvicini F, Colliva C, Reschiglian P. Recent developments in rapid multiplexed bioanalytical methods for foodborne pathogenic bacteria detection. Mikrochim Acta 2012. [DOI: 10.1007/s00604-012-0824-3] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Ivanova EP, Truong VK, Gervinskas G, Mitik-Dineva N, Day D, Jones RT, Crawford RJ, Juodkazis S. Highly selective trapping of enteropathogenic E. coli on Fabry-Pérot sensor mirrors. Biosens Bioelectron 2012; 35:369-375. [PMID: 22494541 DOI: 10.1016/j.bios.2012.03.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2011] [Revised: 03/07/2012] [Accepted: 03/12/2012] [Indexed: 11/29/2022]
Abstract
Untreated recycled water, such as sewage and graywater, will almost always contain a wide range of agents that are likely to present risks to human health, including chemicals and pathogenic microorganisms. The microbial hazards, such as large numbers of enteric pathogens that can cause gastroenteric illness if ingested, are the main cause of concern for human health. The presence of the enteropathogenic Escherichia coli (EPEC) serotype is of particular concern, as this group of bacteria is responsible for causing severe infant and travelers' diarrhea, gastroenteritis and hemolytic uremic syndrome. A biosensing system based on an optical Fabry-Pérot (FP) cavity, capable of directly detecting the presence of EPEC within 5 min, has been developed using a simple micro-thin double-sided adhesive tape and two semi-transparent FP mirror plates. The system utilizes a poly(methyl methacrylate) (PMMA) or glass substrates sputtered by 40-nm-thick gold thin films serving as FP mirrors. Mirrors have been activated using 0.1M mercaptopropionic acid, influencing an immobilization density of the translocated intimin receptor (TIR) of 100 ng/cm(2). The specificity of recognition was confirmed by exposing TIR functionalized surfaces to four taxonomically related and/or distantly related bacterial strains. It was found that the TIR-functionalized surfaces did not show any bacterial capture for these other bacterial strains within a 15 min incubation period.
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Affiliation(s)
- Elena P Ivanova
- Faculty of Life and Social Sciences, Swinburne University of Technology, PO Box 218, Hawthorn 3122, Australia.
| | - Vi Khanh Truong
- Faculty of Life and Social Sciences, Swinburne University of Technology, PO Box 218, Hawthorn 3122, Australia
| | - Gediminas Gervinskas
- Centre for Micro-Photonics, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, PO Box 218, Hawthorn 3122, Australia
| | - Natasa Mitik-Dineva
- Faculty of Life and Social Sciences, Swinburne University of Technology, PO Box 218, Hawthorn 3122, Australia
| | - Daniel Day
- Centre for Micro-Photonics, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, PO Box 218, Hawthorn 3122, Australia
| | - Robert T Jones
- Centre for Materials and Surface Science, Department of Physics, La Trobe University, Victoria 3086, Australia
| | - Russell J Crawford
- Faculty of Life and Social Sciences, Swinburne University of Technology, PO Box 218, Hawthorn 3122, Australia
| | - Saulius Juodkazis
- Centre for Micro-Photonics, Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, PO Box 218, Hawthorn 3122, Australia; Melbourne Centre for Nanofabrication, 151 Wellington Road, Clayton, Victoria 3168, Australia
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Capture antibody targeted fluorescence in situ hybridization (CAT-FISH): Dual labeling allows for increased specificity in complex samples. J Microbiol Methods 2012; 88:275-84. [DOI: 10.1016/j.mimet.2011.12.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Revised: 12/13/2011] [Accepted: 12/13/2011] [Indexed: 11/18/2022]
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Lee YJ, Han SR, Maeng JS, Cho YJ, Lee SW. In vitro selection of Escherichia coli O157:H7-specific RNA aptamer. Biochem Biophys Res Commun 2011; 417:414-20. [PMID: 22166202 DOI: 10.1016/j.bbrc.2011.11.130] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2011] [Accepted: 11/28/2011] [Indexed: 12/23/2022]
Abstract
Escherichia coli (E. coli) O157:H7 is a major foodborne pathogen that causes life-threatening symptoms in humans worldwide. To rapidly and properly identify the pathogen and avoid its toxic effects, ligands which can directly and specifically bind to the virulent E. coli O157:H7 serotype should be identified. In this study, a RNA aptamer-based ligand which can specifically distinguish the pathogen E. coli O157:H7 from others was developed by a subtractive cell-SELEX method. To this end, an RNA library was first incubated with the E. coli K12 strain, and the RNAs binding to the strain were discarded. The precluded RNAs were then used for the selection of O157:H7-specific aptamers. After 6 rounds of the subtractive cell-SELEX process, the selected aptamer was found to specifically bind to the O157:H7 serotype, but not to the K12 strain. This was evidenced by aptamer-immobilized ELISA, real-time PCR analysis, or an aptamer-linked precipitation experiment. Importantly, the isolated RNA aptamer that distinguishes between the virulent serotype and the nonpathogenic strain specifically bound to an O157:H7-specific lipopolysaccharide which includes the O antigen. This novel O157:H7-specific aptamer could be of potential application as a diagnostic ligand against the pathogen-related food borne illness.
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Affiliation(s)
- Young Ju Lee
- Department of Molecular Biology, Institute of Nanosensor and Biotechnology, Dankook University, Yongin, Republic of Korea
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