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Ang B, Jirapanjawat T, Tay KP, Ashtiani D, Greening C, Tuck KL, Neild A, Cadarso VJ. Rapid Concentration and Detection of Bacteria in Milk Using a Microfluidic Surface Acoustic Wave Activated Nanosieve. ACS Sens 2024; 9:3105-3114. [PMID: 38753893 DOI: 10.1021/acssensors.4c00291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
Rapid detection of microbes is a key feature for monitoring food quality. Unfortunately, current detection systems rely on labor-intensive and time-consuming lab-based processes that are not suitable for point-of-interest applications and typically require several days before results are available. Here, we demonstrate a microfluidic system capable of rapidly concentrating, fluorescent staining, and detecting bacteria in unprocessed complex biological media such as milk. This concentration is done using a surface acoustic wave-driven microfluidic device which operates based on the Bjerknes force, a force generated on one particle by another in its close proximity. We exploit this effect by exciting a tightly packed bed of 50 μm polystyrene microparticles temporarily with surface acoustic waves within a microfluidic device to capture and release bacterial cells on demand. The bacterial cells are fluorescently stained during capture and then detected using fluorescence microscopy upon release. This device offers a high capturing efficiency (>80%) and a 34 Colony Forming Units (CFU)/mL limit of detection, which is 1 order of magnitude below that of plate counting at 30 CFU per standard 100 μL plate (or 300 CFU/mL). This can be attained in just 1 h of processing at 10 μL/min. With this system, we demonstrate that bacterial detection from extremely low concentration samples down to the order of ∼10 CFU/mL is possible without requiring any additional external pre- or postprocessing.
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Affiliation(s)
- Bryan Ang
- Department of Mechanical and Aerospace Engineering, Monash University, Clayton 3168, Victoria, Australia
- Centre to Impact Antimicrobial Resistance, Monash University, Clayton 3168, Victoria, Australia
| | - Thanavit Jirapanjawat
- Department of Microbiology, Biomedicine Discovery Institute, Monash University, Clayton 3168, Victoria, Australia
| | - Khai Ping Tay
- Department of Mechanical and Aerospace Engineering, Monash University, Clayton 3168, Victoria, Australia
| | | | - Chris Greening
- Centre to Impact Antimicrobial Resistance, Monash University, Clayton 3168, Victoria, Australia
- Department of Microbiology, Biomedicine Discovery Institute, Monash University, Clayton 3168, Victoria, Australia
| | - Kellie L Tuck
- School of Chemistry, Monash University, Clayton 3800, Victoria, Australia
| | - Adrian Neild
- Department of Mechanical and Aerospace Engineering, Monash University, Clayton 3168, Victoria, Australia
| | - Victor J Cadarso
- Department of Mechanical and Aerospace Engineering, Monash University, Clayton 3168, Victoria, Australia
- Centre to Impact Antimicrobial Resistance, Monash University, Clayton 3168, Victoria, Australia
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Abbasi R, Imanbekova M, Wachsmann-Hogiu S. On-chip bioluminescence biosensor for the detection of microbial surface contamination. Biosens Bioelectron 2024; 254:116200. [PMID: 38518562 DOI: 10.1016/j.bios.2024.116200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 03/04/2024] [Accepted: 03/07/2024] [Indexed: 03/24/2024]
Abstract
Detection of microbial pathogens is important for food safety reasons, and for monitoring sanitation in laboratory environments and health care settings. Traditional detection methods such as culture-based and nucleic acid-based methods are time-consuming, laborious, and require expensive laboratory equipment. Recently, ATP-based bioluminescence methods were developed to assess surface contamination, with commercial products available. In this study, we introduce a biosensor based on a CMOS image sensor for ATP-mediated chemiluminescence detection. The original lens and IR filter were removed from the CMOS sensor revealing a 12 MP periodic microlens/pixel array on an area of 6.5 mm × 3.6 mm. UltraSnap swabs are used to collect samples from solid surfaces including personal electronic devices, and office and laboratory equipment. Samples mixed with chemiluminescence reagents were placed directly on the surface of the image sensor. Close proximity of the sample to the photodiode array leads to high photon collection efficiency. The population of microorganisms can be assessed and quantified by analyzing the intensity of measured chemiluminescence. We report a linear range and limit of detection for measuring ATP in UltraSnap buffer of 10-1000 nM and 225 fmol, respectively. The performance of the CMOS-based device was compared to a commercial luminometer, and a high correlation with a Pearson's correlation coefficient of 0.98589 was obtained. The Bland-Altman plot showed no significant bias between the results of the two methods. Finally, microbial contamination of different surfaces was analyzed with both methods, and the CMOS biosensor exhibited the same trend as the commercial luminometer.
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Affiliation(s)
- Reza Abbasi
- Department of Bioengineering, McGill University, Montreal, QC, H3A 0E9, Canada
| | - Meruyert Imanbekova
- Department of Bioengineering, McGill University, Montreal, QC, H3A 0E9, Canada
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3
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Myndrul V, Yanovska A, Babayevska N, Korniienko V, Diedkova K, Jancelewicz M, Pogorielov M, Iatsunskyi I. 1D ZnO-Au nanocomposites as label-free photoluminescence immunosensors for rapid detection of Listeria monocytogenes. Talanta 2024; 271:125641. [PMID: 38218055 DOI: 10.1016/j.talanta.2024.125641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 01/04/2024] [Accepted: 01/05/2024] [Indexed: 01/15/2024]
Abstract
In this study, we explore the potential of 1D ZnO-Au nanocomposites as innovative label-free photoluminescence (PL) immunosensors for rapidly detecting Listeria monocytogenes, a significant concern in food safety. We synthesized ZnO nanorods (ZnO_NR) and nanowires (ZnO_NW), followed by Au deposition to create ZnO_NR/Au and ZnO_NW/Au nanocomposites. Our analyses, including SEM, TEM, Raman spectroscopy, and photoluminescence (PL), revealed distinct structural and optical properties of these nanocomposites, especially noting the superior crystallinity and stability of ZnO_NR/Au. The biosensor performance was evaluated through PL sensitivity to Anti-Listeria antibodies, demonstrating that ZnO_NR with higher concentration of Au nanoparticles exhibited higher sensitivity and a lower limit of detection (LOD), attributed to a greater density of Listeria binding sites. The developed biosensor demonstrated a remarkable limit of detection (LOD) of 8.3 × 102 CFU/mL, rivaling or surpassing conventional culture-based methods and some molecular techniques. This research underscores the critical role of Au deposition duration in optimizing biosensor performance and presents a promising advancement in rapid and sensitive Listeria detection, with significant implications for enhancing food safety protocols.
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Affiliation(s)
- Valerii Myndrul
- Sensor Engineering Department, Faculty of Science and Engineering, Maastricht University, 6200 MD Maastricht, the Netherlands
| | - Anna Yanovska
- Theoretical and Applied Chemistry Department, Sumy State University, M, Sumtsova Str., 2, 40007, Sumy, Ukraine
| | - Nataliya Babayevska
- NanoBioMedical Centre, Adam Mickiewicz University, 3, Wszechnicy Piastowskiej Str., 61 614 Poznan, Poland
| | - Viktoriia Korniienko
- Institute of Atomic Physics and Spectroscopy, University of Latvia, Riga, Latvia; Biomedical Research Center, Medical Institute, Sumy State University, Sanatornaya St. 31, 40018, Sumy, Ukraine
| | - Kateryna Diedkova
- Institute of Atomic Physics and Spectroscopy, University of Latvia, Riga, Latvia; Biomedical Research Center, Medical Institute, Sumy State University, Sanatornaya St. 31, 40018, Sumy, Ukraine
| | - Mariusz Jancelewicz
- NanoBioMedical Centre, Adam Mickiewicz University, 3, Wszechnicy Piastowskiej Str., 61 614 Poznan, Poland
| | - Maksym Pogorielov
- Institute of Atomic Physics and Spectroscopy, University of Latvia, Riga, Latvia.
| | - Igor Iatsunskyi
- NanoBioMedical Centre, Adam Mickiewicz University, 3, Wszechnicy Piastowskiej Str., 61 614 Poznan, Poland.
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Tan Q, Shi Y, Duan C, Li Q, Gong T, Li S, Duan X, Xie H, Li Y, Chen L. Simple, sensitive, and visual detection of 12 respiratory pathogens with one-pot-RPA-CRISPR/Cas12a assay. J Med Virol 2024; 96:e29624. [PMID: 38647075 DOI: 10.1002/jmv.29624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Revised: 03/21/2024] [Accepted: 04/11/2024] [Indexed: 04/25/2024]
Abstract
Respiratory infections pose a serious threat to global public health, underscoring the urgent need for rapid, accurate, and large-scale diagnostic tools. In recent years, the CRISPR/Cas (clustered regularly interspaced short palindromic repeats/CRISPR-associated) system, combined with isothermal amplification methods, has seen widespread application in nucleic acid testing (NAT). However, achieving a single-tube reaction system containing all necessary components is challenging due to the competitive effects between recombinase polymerase amplification (RPA) and CRISPR/Cas reagents. Furthermore, to enable precision medicine, distinguishing between bacterial and viral infections is essential. Here, we have developed a novel NAT method, termed one-pot-RPA-CRISPR/Cas12a, which combines RPA with CRISPR molecular diagnostic technology, enabling simultaneous detection of 12 common respiratory pathogens, including six bacteria and six viruses. RPA and CRISPR/Cas12a reactions are separated by paraffin, providing an independent platform for RPA reactions to generate sufficient target products before being mixed with the CRISPR/Cas12a system. Results can be visually observed under LED blue light. The sensitivity of the one-pot-RPA-CRISPR/Cas12a method is 2.5 × 100 copies/μL plasmids, with no cross-reaction with other bacteria or viruses. Additionally, the clinical utility was evaluated by testing clinical isolates of bacteria and virus throat swab samples, demonstrating favorable performance. Thus, our one-pot-RPA-CRISPR/Cas12a method shows immense potential for accurate and large-scale detection of 12 common respiratory pathogens in point-of-care testing.
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Affiliation(s)
- Qi Tan
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College, Chengdu, China
| | - Yaoqiang Shi
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College, Chengdu, China
| | - Chenlu Duan
- Sichuan Provincial Judicial Police General Hospital, Chengdu, China
| | - Qingyuan Li
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College, Chengdu, China
- North Sichuan Medical College, Nanchong, Sichuan, China
| | - Tao Gong
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College, Chengdu, China
- North Sichuan Medical College, Nanchong, Sichuan, China
| | - Shilin Li
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College, Chengdu, China
| | - Xiaoqiong Duan
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College, Chengdu, China
| | - He Xie
- The Hospital of Xidian Group, Xi'an, China
| | - Yujia Li
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College, Chengdu, China
| | - Limin Chen
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences and Peking Union Medical College, Chengdu, China
- The Hospital of Xidian Group, Xi'an, China
- The Joint-Laboratory on Transfusion-Transmitted Diseases (TTDs) between Institute of Blood Transfusion and Nanning Blood Center, Nanning Blood Center, Nanning, China
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Liu Y, Fan J, Sun X, Zhou Z. Validation of the FSTestTM Aerobic Count Plates Method for Enumeration of Aerobic Bacteria in a Variety of Matrixes and Stainless Steel Environmental Surface: AOAC Performance Tested MethodSM 112301. J AOAC Int 2024; 107:320-331. [PMID: 38070145 DOI: 10.1093/jaoacint/qsad132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 11/29/2023] [Indexed: 03/03/2024]
Abstract
BACKGROUND The FSTestTM Aerobic Count (AC) Plates are ready-to-use culture media containing nutrients, a cold-water-soluble gelling agent, and a chromogenic indicator. OBJECTIVE The objective of this study was to validate the FSTest AC plate method for AOAC INTERNATIONAL Performance Tested MethodsSM (PTM) certification for a variety of foods and stainless steel. METHODS The performance of the FSTest AC plates were compared to the appropriate reference method, for the detection of total aerobic bacterial in a variety of foods matrixes (raw ground beef, raw ground pork, cooked ham, raw chicken breast, raw shrimp, frozen tuna, shredded bagged lettuce, cherry tomato, pasteurized liquid milk, nonfat milk powder) and on stainless steel surfaces. Robustness, consistency, and stability studies of the FSTest AC plate were also conducted. RESULTS The results of the matrix study showed the standard deviation of repeatability (sr) was similar in both the FSTest AC plate method and the reference method. The 90% confidence interval of the difference between means between the two methods was found to fall within -0.5 to 0.5 log10 for all matrixes at all levels in the method developer and independent laboratory studies. The data in the report also support that the FSTest AC plate method is robust, manufactured in a consistent manner, and can be stable for 18 months at 4-10°C. CONCLUSIONS The FSTest AC method is validated to be equivalent to the appropriate reference methods for the enumeration of aerobic bacteria in a variety of food matrixes and on stainless steel surfaces at 36 ± 1°C, and 32 ± 1°C (for dairy matrixes) in 24 ± 1 h. HIGHLIGHTS The FSTest AC plate method offers the advantage of saving labor, space, and time, as results are available within 24 h for all tested matrixes.
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Affiliation(s)
- Yun Liu
- Dayuan & Oasis Food Tech Ltd, 3rd Floor, Building A2, No.11, Kaiyuan Ave, Guangzhou 510530, China
| | - Jun Fan
- Dayuan & Oasis Food Tech Ltd, 3rd Floor, Building A2, No.11, Kaiyuan Ave, Guangzhou 510530, China
| | - Xia Sun
- Dayuan & Oasis Food Tech Ltd, 3rd Floor, Building A2, No.11, Kaiyuan Ave, Guangzhou 510530, China
| | - Zican Zhou
- Dayuan & Oasis Food Tech Ltd, 3rd Floor, Building A2, No.11, Kaiyuan Ave, Guangzhou 510530, China
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Chikhi L, Mancier M, Brugère H, Lombard B, Faouzi L, Guillier L, Gnanou Besse N. Comparison of Listeria monocytogenes alternative detection methods for food microbiology official controls in Europe. Int J Food Microbiol 2024; 408:110448. [PMID: 37890286 DOI: 10.1016/j.ijfoodmicro.2023.110448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Revised: 10/12/2023] [Accepted: 10/14/2023] [Indexed: 10/29/2023]
Abstract
Listeriosis remains one of the most severe foodborne diseases regarding mortality rate. L. monocytogenes can grow under stressful conditions and contaminate various food categories. Regulation (EC) No 2073/2005 modified on microbiological criteria for foodstuffs includes either qualitative or quantitative food safety criteria on L. monocytogenes and mentions EN ISO 11290-1 Standard as the reference detection method. The use of alternative certified methods is allowed at European level for own checks and by certain European countries in the frame of official controls. Here we report the comparison of alternative certified methods for the detection of L. monocytogenes, according to the criteria expressed by the National Reference Laboratories (NRLs) for L. monocytogenes network in Europe, through an enquiry conducted in 2022 by the European Union Reference Laboratory (EURL) for L. monocytogenes. Emerging detection methods make it possible to diversify the panel of available detection methods. Each method has advantages and limitations and the choice of a method depends on the needs, organization and objectives of the laboratory. Our study focused on a comparison by category in order to provide an overview of the differences between the methods as complete and simple as possible, mainly by examining the certification files of the alternative methods, which constitute a reliable and publicly accessible source of information about performances of the methods.
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Affiliation(s)
- Lucas Chikhi
- Agence Nationale de Sécurité Sanitaire, French agency for food, environmental and occupational health safety, Laboratory for food safety (ANSES), 14 rue Pierre et Marie Curie, 94702 Maisons Alfort cedex, France; Ecole Nationale Vétérinaire de Toulouse (ENVT), Université de Toulouse, Toulouse, France
| | - Mélanie Mancier
- Agence Nationale de Sécurité Sanitaire, French agency for food, environmental and occupational health safety, Laboratory for food safety (ANSES), 14 rue Pierre et Marie Curie, 94702 Maisons Alfort cedex, France; Ecole Nationale Vétérinaire de Toulouse (ENVT), Université de Toulouse, Toulouse, France
| | - Hubert Brugère
- Ecole Nationale Vétérinaire de Toulouse (ENVT), Université de Toulouse, Toulouse, France; IRSD, Université de Toulouse, INSERM, INRAE, ENVT, UPS, Toulouse, France.
| | - Bertrand Lombard
- ANSES, Research and Reference Division, Strategy and Programmes Directorate, 14 rue Pierre et Marie Curie, 94702 Maisons-Alfort cedex, France.
| | - Lyazrhi Faouzi
- Ecole Nationale Vétérinaire de Toulouse (ENVT), Université de Toulouse, Toulouse, France.
| | | | - Nathalie Gnanou Besse
- Agence Nationale de Sécurité Sanitaire, French agency for food, environmental and occupational health safety, Laboratory for food safety (ANSES), 14 rue Pierre et Marie Curie, 94702 Maisons Alfort cedex, France.
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Seet WT, Mat Afandi MA, Ishak MF, Hassan MNF, Ahmat N, Ng MH, Maarof M. Quality management overview for the production of a tissue-engineered human skin substitute in Malaysia. Stem Cell Res Ther 2023; 14:298. [PMID: 37858277 PMCID: PMC10588160 DOI: 10.1186/s13287-023-03536-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 10/11/2023] [Indexed: 10/21/2023] Open
Abstract
Treatments for skin injuries have recently advanced tremendously. Such treatments include allogeneic and xenogeneic transplants and skin substitutes such as tissue-engineered skin, cultured cells, and stem cells. The aim of this paper is to discuss the general overview of the quality assurance and quality control implemented in the manufacturing of cell and tissue product, with emphasis on our experience in the manufacturing of MyDerm®, an autologous bilayered human skin substitute. Manufacturing MyDerm® requires multiple high-risk open manipulation steps, such as tissue processing, cell culture expansion, and skin construct formation. To ensure the safety and efficacy of this product, the good manufacturing practice (GMP) facility should establish a well-designed quality assurance and quality control (QA/QC) programme. Standard operating procedures (SOP) should be implemented to ensure that the manufacturing process is consistent and performed in a controlled manner. All starting materials, including tissue samples, culture media, reagents, and consumables must be verified and tested to confirm their safety, potency, and sterility. The final products should also undergo a QC testing series to guarantee product safety, efficacy, and overall quality. The aseptic techniques of cleanroom operators and the environmental conditions of the facility are also important, as they directly influence the manufacturing of good-quality products. Hence, personnel training and environmental monitoring are necessary to maintain GMP compliance. Furthermore, risk management implementation is another important aspect of QA/QC, as it is used to identify and determine the risk level and to perform risk assessments when necessary. Moreover, procedures for non-conformance reporting should be established to identify, investigate, and correct deviations that occur during manufacturing. This paper provides insight and an overview of the QA/QC aspect during MyDerm® manufacturing in a GMP-compliant facility in the Centre for Tissue Engineering and Regenerative Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia.
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Affiliation(s)
- Wan Tai Seet
- Centre for Tissue Engineering and Regenerative Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, Bandar Tun Razak, 56000, Kuala Lumpur, Malaysia
| | - Mohd Asyraf Mat Afandi
- Centre for Tissue Engineering and Regenerative Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, Bandar Tun Razak, 56000, Kuala Lumpur, Malaysia
| | - Mohamad Fikeri Ishak
- Centre for Tissue Engineering and Regenerative Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, Bandar Tun Razak, 56000, Kuala Lumpur, Malaysia
| | - Muhammad Najib Fathi Hassan
- Centre for Tissue Engineering and Regenerative Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, Bandar Tun Razak, 56000, Kuala Lumpur, Malaysia
| | - Nazeha Ahmat
- Centre for Tissue Engineering and Regenerative Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, Bandar Tun Razak, 56000, Kuala Lumpur, Malaysia
| | - Min Hwei Ng
- Centre for Tissue Engineering and Regenerative Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, Bandar Tun Razak, 56000, Kuala Lumpur, Malaysia
| | - Manira Maarof
- Centre for Tissue Engineering and Regenerative Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Jalan Yaacob Latif, Bandar Tun Razak, 56000, Kuala Lumpur, Malaysia.
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8
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Lomakina GY, Ugarova NN. Luciola mingrelica firefly luciferase as a marker in bioluminescent immunoassays. Biophys Rev 2023; 15:955-962. [PMID: 37975007 PMCID: PMC10643422 DOI: 10.1007/s12551-023-01115-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2023] [Accepted: 08/13/2023] [Indexed: 11/19/2023] Open
Abstract
Chemical modification of the enzymes with biospecific macromolecules is used in various fields of biotechnology to impart new functions or improve their properties and is a fast and convenient way to get the final products. The preparation of highly active, stable, and functionally active conjugates of the thermostable luciferase through the NH2-groups or free SH-groups of the enzyme with target molecules of different molecular weight (albumin, avidin from chicken eggs, antibodies, and progesterone) is described. The obtained conjugates were successfully tested as a reporter in bioluminescent immunoassay for the detection of the molecules and pathogens. Thus, the luc-albumin (Luc-Alb) and luc-insulin (Luc-Ins) conjugates were used in competitive ELISA for the detection of an analyte (albumin or insulin) in the samples. Luc-progesterone (Luc-Pg) was used in the rapid homogeneous immunoassay of progesterone by the BRET technique with the detection limit of 0.5 ng/ml. Luciferase conjugates with avidin (Luc-Avi) and secondary and primary antibodies (Luc-RAM and Luc-Sal) were used for enzyme immunoassay detection of Salmonella paratyphi A cells with the cell detection limit of 5 × 104 CFU/ml. To reduce the detection limit of Salmonella cells, we developed a pseudo-homogeneous bioluminescent enzyme immunoassay of cells using a new matrix for the analyte capture-polystyrene microparticles coated with Pluronic F108, covalently labeled with Sal antibodies. This allowed to achieve efficient trapping of cells from solution, significantly reduced nonspecific sorption and decreased the cell detection limit to 2.7 × 103 CFU/ml without prior concentration of the sample. The methodology that was developed in this study can be applied for the development of novel bioanalytical systems based on firefly luciferases.
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Affiliation(s)
- Galina Yu. Lomakina
- Faculty of Chemistry, Lomonosov Moscow State University, Moscow, Russia
- Bauman Moscow State Technical University, Moscow, Russia
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9
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Papkovsky DB, Kerry JP. Oxygen Sensor-Based Respirometry and the Landscape of Microbial Testing Methods as Applicable to Food and Beverage Matrices. SENSORS (BASEL, SWITZERLAND) 2023; 23:s23094519. [PMID: 37177723 PMCID: PMC10181535 DOI: 10.3390/s23094519] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 04/19/2023] [Accepted: 04/27/2023] [Indexed: 05/15/2023]
Abstract
The current status of microbiological testing methods for the determination of viable bacteria in complex sample matrices, such as food samples, is the focus of this review. Established methods for the enumeration of microorganisms, particularly, the 'gold standard' agar plating method for the determination of total aerobic viable counts (TVC), bioluminescent detection of total ATP, selective molecular methods (immunoassays, DNA/RNA amplification, sequencing) and instrumental methods (flow cytometry, Raman spectroscopy, mass spectrometry, calorimetry), are analyzed and compared with emerging oxygen sensor-based respirometry techniques. The basic principles of optical O2 sensing and respirometry and the primary materials, detection modes and assay formats employed are described. The existing platforms for bacterial cell respirometry are then described, and examples of particular assays are provided, including the use of rapid TVC tests of food samples and swabs, the toxicological screening and profiling of cells and antimicrobial sterility testing. Overall, O2 sensor-based respirometry and TVC assays have high application potential in the food industry and related areas. They detect viable bacteria via their growth and respiration; the assay is fast (time to result is 2-8 h and dependent on TVC load), operates with complex samples (crude homogenates of food samples) in a simple mix-and-measure format, has low set-up and instrumentation costs and is inexpensive and portable.
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Affiliation(s)
- Dmitri B Papkovsky
- School of Biochemistry and Cell Biology, University College Cork, Pharmacy Building, College Road, T12 YT20 Cork, Ireland
| | - Joseph P Kerry
- School of Food and Nutritional Sciences, University College Cork, Microbiology Building, College Road, T12 YT20 Cork, Ireland
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10
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Elbehiry A, Abalkhail A, Marzouk E, Elmanssury AE, Almuzaini AM, Alfheeaid H, Alshahrani MT, Huraysh N, Ibrahem M, Alzaben F, Alanazi F, Alzaben M, Anagreyyah SA, Bayameen AM, Draz A, Abu-Okail A. An Overview of the Public Health Challenges in Diagnosing and Controlling Human Foodborne Pathogens. Vaccines (Basel) 2023; 11:vaccines11040725. [PMID: 37112637 PMCID: PMC10143666 DOI: 10.3390/vaccines11040725] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 03/19/2023] [Accepted: 03/21/2023] [Indexed: 03/29/2023] Open
Abstract
Pathogens found in food are believed to be the leading cause of foodborne illnesses; and they are considered a serious problem with global ramifications. During the last few decades, a lot of attention has been paid to determining the microorganisms that cause foodborne illnesses and developing new methods to identify them. Foodborne pathogen identification technologies have evolved rapidly over the last few decades, with the newer technologies focusing on immunoassays, genome-wide approaches, biosensors, and mass spectrometry as the primary methods of identification. Bacteriophages (phages), probiotics and prebiotics were known to have the ability to combat bacterial diseases since the turn of the 20th century. A primary focus of phage use was the development of medical therapies; however, its use quickly expanded to other applications in biotechnology and industry. A similar argument can be made with regards to the food safety industry, as diseases directly endanger the health of customers. Recently, a lot of attention has been paid to bacteriophages, probiotics and prebiotics most likely due to the exhaustion of traditional antibiotics. Reviewing a variety of current quick identification techniques is the purpose of this study. Using these techniques, we are able to quickly identify foodborne pathogenic bacteria, which forms the basis for future research advances. A review of recent studies on the use of phages, probiotics and prebiotics as a means of combating significant foodborne diseases is also presented. Furthermore, we discussed the advantages of using phages as well as the challenges they face, especially given their prevalent application in food safety.
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Affiliation(s)
- Ayman Elbehiry
- Department of Public Health, College of Public Health and Health Informatics, Qassim University, Al Bukayriyah 52741, Saudi Arabia (E.M.)
- Department of Bacteriology, Mycology and Immunology, Faculty of Veterinary Medicine, University of Sadat City, Sadat City 32511, Egypt
- Correspondence:
| | - Adil Abalkhail
- Department of Public Health, College of Public Health and Health Informatics, Qassim University, Al Bukayriyah 52741, Saudi Arabia (E.M.)
| | - Eman Marzouk
- Department of Public Health, College of Public Health and Health Informatics, Qassim University, Al Bukayriyah 52741, Saudi Arabia (E.M.)
| | - Ahmed Elnadif Elmanssury
- Department of Public Health, College of Public Health and Health Informatics, Qassim University, Al Bukayriyah 52741, Saudi Arabia (E.M.)
| | - Abdulaziz M. Almuzaini
- Department of Veterinary Medicine, College of Agriculture and Veterinary Medicine, Qassim University, Buraydah 52571, Saudi Arabia
| | - Hani Alfheeaid
- Department of Food Science and Human Nutrition, College of Agriculture and Veterinary Medicine, Qassim University, Buraydah 51452, Saudi Arabia
- Human Nutrition, School of Medicine, Nursing and Dentistry, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow G31 2ER, UK
| | - Mohammed T. Alshahrani
- Department of Neurology, Prince Sultan Military Medical City, Riyadh 12233, Saudi Arabia
| | - Nasser Huraysh
- Department of Family Medicine, King Fahad Armed Hospital, Jeddah 23311, Saudi Arabia
| | - Mai Ibrahem
- Department of Public Health, College of Applied Medical Science, King Khalid University, Abha 61421, Saudi Arabia;
- Department of Aquatic Animal Medicine and Management, Faculty of Veterinary Medicine, Cairo University, Cairo 12211, Egypt
| | - Feras Alzaben
- Department of Food Service, King Fahad Armed Hospital, Jeddah 23311, Saudi Arabia
| | - Farhan Alanazi
- Supply Administration, Armed Forces Hospital, King Abdul Aziz Naval Base in Jubail, Jubail 35517, Saudi Arabia
| | - Mohammed Alzaben
- Department of Food Factories Inspection, Operation Sector, Saudi Food and Drug Authority, Riyadh 13513, Saudi Arabia
| | | | | | - Abdelmaged Draz
- Department of Veterinary Medicine, College of Agriculture and Veterinary Medicine, Qassim University, Buraydah 52571, Saudi Arabia
| | - Akram Abu-Okail
- Department of Veterinary Medicine, College of Agriculture and Veterinary Medicine, Qassim University, Buraydah 52571, Saudi Arabia
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11
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Li J, Chen J, Dai Y, Liu Z, Zhao J, Liu S, Xiao R. Magnetic SERS Strip Based on 4-mercaptophenylboronic Acid-Modified Fe 3O 4@Au for Active Capture and Simultaneous Detection of Respiratory Bacteria. BIOSENSORS 2023; 13:210. [PMID: 36831976 PMCID: PMC9953780 DOI: 10.3390/bios13020210] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/16/2023] [Accepted: 01/18/2023] [Indexed: 06/18/2023]
Abstract
The rapid diagnosis and detection of respiratory bacteria at the early stage can effectively control the epidemic spread and bacterial infection. Here, we designed a rapid, ultrasensitive, and quantitative lateral flow immunoassay (LFA) strip for simultaneous detection of respiratory bacteria S. aureus and S. pneumoniae. In this assay, the surface enhanced Raman scattering (SERS) tags were designed through combining magnetite Raman enhancement nanoparticle Fe3O4@Au/DTNB and recognition element 4-mercaptophenylboronic acid (4-MPBA). Further, 4-MPBA could capture multiple bacteria in a complex environmental solution. Based on the strategies, Fe3O4@Au/DTNB-mediated magnetic enrichment and 4-MPBA-mediated universal capture capabilities improved the detection sensitivity, the limits of detection for S. aureus and S. pneumoniae were as low as 8 and 13 CFU mL-1, respectively, which were more sensitive than those of colloidal gold method. The Fe3O4@Au/DTNB/Au/4-MPBA-LFA also exhibited good reproducibility, excellent specificity, and high recovery rates in sputum samples, indicating its potential application in the detection of respiratory bacteria samples.
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Affiliation(s)
- Jingfei Li
- Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Jin Chen
- Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
- Department of Clinical Laboratory, Beijing Ditan Hospital, Capital Medical University, Beijing 100015, China
| | - Yuwei Dai
- Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Zhenzhen Liu
- Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Junnan Zhao
- Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
| | - Shuchen Liu
- Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Rui Xiao
- Beijing Institute of Microbiology and Epidemiology, Beijing 100071, China
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12
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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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13
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Lanzl M, Zwietering M, Abee T, den Besten H. Combining enrichment with multiplex real-time PCR leads to faster detection and identification of Campylobacter spp. in food compared to ISO 10272–1:2017. Food Microbiol 2022; 108:104117. [DOI: 10.1016/j.fm.2022.104117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 07/26/2022] [Accepted: 08/14/2022] [Indexed: 11/16/2022]
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14
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Metabolomic approaches for the detection of Listeria monocytogenes and Staphylococcus aureus in culture media. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.114117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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15
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Deng S, Tu Y, Fu L, Liu J, Jia L. A label-free biosensor for selective detection of Gram-negative bacteria based on the oxidase-like activity of cupric oxide nanoparticles. Mikrochim Acta 2022; 189:471. [DOI: 10.1007/s00604-022-05571-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 11/03/2022] [Indexed: 11/27/2022]
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16
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Osek J, Lachtara B, Wieczorek K. Listeria monocytogenes in foods-From culture identification to whole-genome characteristics. Food Sci Nutr 2022; 10:2825-2854. [PMID: 36171778 PMCID: PMC9469866 DOI: 10.1002/fsn3.2910] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 04/06/2022] [Accepted: 04/19/2022] [Indexed: 12/03/2022] Open
Abstract
Listeria monocytogenes is an important foodborne pathogen, which is able to persist in the food production environments. The presence of these bacteria in different niches makes them a potential threat for public health. In the present review, the current information on the classical and alternative methods used for isolation and identification of L. monocytogenes in food have been described. Although these techniques are usually simple, standardized, inexpensive, and are routinely used in many food testing laboratories, several alternative molecular-based approaches for the bacteria detection in food and food production environments have been developed. They are characterized by the high sample throughput, a short time of analysis, and cost-effectiveness. However, these methods are important for the routine testing toward the presence and number of L. monocytogenes, but are not suitable for characteristics and typing of the bacterial isolates, which are crucial in the study of listeriosis infections. For these purposes, novel approaches, with a high discriminatory power to genetically distinguish the strains during epidemiological studies, have been developed, e.g., whole-genome sequence-based techniques such as NGS which provide an opportunity to perform comparison between strains of the same species. In the present review, we have shown a short description of the principles of microbiological, alternative, and modern methods of detection of L. monocytogenes in foods and characterization of the isolates for epidemiological purposes. According to our knowledge, similar comprehensive papers on such subject have not been recently published, and we hope that the current review may be interesting for research communities.
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Affiliation(s)
- Jacek Osek
- Department of Hygiene of Food of Animal OriginNational Veterinary Research InstitutePuławyPoland
| | - Beata Lachtara
- Department of Hygiene of Food of Animal OriginNational Veterinary Research InstitutePuławyPoland
| | - Kinga Wieczorek
- Department of Hygiene of Food of Animal OriginNational Veterinary Research InstitutePuławyPoland
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17
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Anti oxidative potentials and storage stability of pasteurised mixed fruits juices from pineapple and bitter orange. FOOD BIOSCI 2022. [DOI: 10.1016/j.fbio.2022.101937] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Liang S, Sutham P, Wu K, Mallikarjunan K, Wang JP. Giant Magnetoresistance Biosensors for Food Safety Applications. SENSORS (BASEL, SWITZERLAND) 2022; 22:s22155663. [PMID: 35957220 PMCID: PMC9371012 DOI: 10.3390/s22155663] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 07/25/2022] [Accepted: 07/26/2022] [Indexed: 05/25/2023]
Abstract
Nowadays, the increasing number of foodborne disease outbreaks around the globe has aroused the wide attention of the food industry and regulators. During food production, processing, storage, and transportation, microorganisms may grow and secrete toxins as well as other harmful substances. These kinds of food contamination from microbiological and chemical sources can seriously endanger human health. The traditional detection methods such as cell culture and colony counting cannot meet the requirements of rapid detection due to some intrinsic shortcomings, such as being time-consuming, laborious, and requiring expensive instrumentation or a central laboratory. In the past decade, efforts have been made to develop rapid, sensitive, and easy-to-use detection platforms for on-site food safety regulation. Herein, we review one type of promising biosensing platform that may revolutionize the current food surveillance approaches, the giant magnetoresistance (GMR) biosensors. Benefiting from the advances of nanotechnology, hundreds to thousands of GMR biosensors can be integrated into a fingernail-sized area, allowing the higher throughput screening of food samples at a lower cost. In addition, combined with on-chip microfluidic channels and filtration function, this type of GMR biosensing system can be fully automatic, and less operator training is required. Furthermore, the compact-sized GMR biosensor platforms could be further extended to related food contamination and the field screening of other pathogen targets.
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Affiliation(s)
- Shuang Liang
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA;
| | - Phanatchakorn Sutham
- Department of Food Science and Nutrition, University of Minnesota, St. Paul, MN 55108, USA;
| | - Kai Wu
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, USA
- Department of Electrical and Computer Engineering, Texas Tech University, Lubbock, TX 79409, USA
| | - Kumar Mallikarjunan
- Department of Food Science and Nutrition, University of Minnesota, St. Paul, MN 55108, USA;
| | - Jian-Ping Wang
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA;
- Department of Electrical and Computer Engineering, University of Minnesota, Minneapolis, MN 55455, USA
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19
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Vo KC, Wada A, Iwata R, Asada R, Sakamoto JJ, Furuta M, Tsuchido T. Evaluation of distinct modes of oxidative secondary injury generated in heat-treated cells of Escherichia coli with solid/liquid and complex/semi-synthetic media sets. J Appl Microbiol 2022; 133:2361-2374. [PMID: 35771133 DOI: 10.1111/jam.15697] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 05/26/2022] [Accepted: 06/27/2022] [Indexed: 11/28/2022]
Abstract
AIMS To characterize and evaluate oxidative secondary injury generated in heat-treated Escherichia coli cells during recovery cultivation either on agar or in a broth of a semi-synthetic enriched M9 (EM9) medium and a complex Luria broth (LB) medium with different types of antioxidants. METHODS AND RESULTS E. coli cells grown in the EM9 and LB broth were heated at 50o C in a buffer (pH7.0). Heated cells were recovered on the same kind of agar medium as that used for growth, with or without different antioxidants. Although these antioxidants mostly protected the cells from oxidative secondary injury on the recovery media, sodium thiosulfate and sodium pyruvate were most protective on EM9 and LB agars, respectively. Determination of viability using the most probable number and growth delay analysis methods showed significant reductions in the protective effects of antioxidants in the EM9 and LB media. CONCLUSION Oxidative secondary injury generated in heated E. coli cells was found to be qualitatively and quantitatively diverse under cellular and environmental conditions. SIGNIFICANCE AND IMPACT OF THE STUDY Our results suggest that different modes of oxidation should be considered in viability determination and injured cell enumeration of heat-treated cells.
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Affiliation(s)
- K C Vo
- Department of Quantum and Radiation Engineering, Graduate School of Engineering, Osaka Prefecture University, 1-2 Gakuen-cho, Naka-ku, Sakai, Japan
| | - A Wada
- Department of Quantum and Radiation Engineering, Graduate School of Engineering, Osaka Prefecture University, 1-2 Gakuen-cho, Naka-ku, Sakai, Japan
| | - R Iwata
- Department of Quantum and Radiation Engineering, Graduate School of Engineering, Osaka Prefecture University, 1-2 Gakuen-cho, Naka-ku, Sakai, Japan
| | - R Asada
- Department of Quantum and Radiation Engineering, Graduate School of Engineering, Osaka Prefecture University, 1-2 Gakuen-cho, Naka-ku, Sakai, Japan.,Radiation Research Center, Organization for Research Promotion, Osaka Prefecture University, 1-2 Gakuen-cho, Naka-ku, Sakai, Japan.,Research Center of Microorganism Control, Organization for Research Promotion, Osaka Prefecture University, 1-2 Gakuen-cho, Naka-ku, Sakai, Japan
| | - J J Sakamoto
- Research Center of Microorganism Control, Organization for Research Promotion, Osaka Prefecture University, 1-2 Gakuen-cho, Naka-ku, Sakai, Japan.,Faculty of Materials, Chemistry, Engineering, Kansai University, 3-3-35 Yamate-cho, Suita, Osaka, Japan
| | - M Furuta
- Department of Quantum and Radiation Engineering, Graduate School of Engineering, Osaka Prefecture University, 1-2 Gakuen-cho, Naka-ku, Sakai, Japan.,Radiation Research Center, Organization for Research Promotion, Osaka Prefecture University, 1-2 Gakuen-cho, Naka-ku, Sakai, Japan.,Research Center of Microorganism Control, Organization for Research Promotion, Osaka Prefecture University, 1-2 Gakuen-cho, Naka-ku, Sakai, Japan
| | - T Tsuchido
- Research Center of Microorganism Control, Organization for Research Promotion, Osaka Prefecture University, 1-2 Gakuen-cho, Naka-ku, Sakai, Japan
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20
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Development of Multiplex-PCR Method to Detect Three Bacterial Species in Food and their Use in Food Inspection. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2022. [DOI: 10.22207/jpam.16.2.63] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Food contains several microorganisms that may cause illnesses and food poisoning in humans. Small numbers of microorganism contamination could result in rapid spoilage of food. The Centres for Disease Control and Prevention (CDC), USA estimates that 76 million people are affected by foodborne illnesses each year in the USA. Salmonella infections alone account for one billion dollars yearly in direct and indirect medical costs and more than 5,000 deaths. In Sudan, diarrhoeal disease was reported as the second major disease during the years from 2003 to 2007 (Annual health statistical report of the Federal Ministry of Health, Sudan). We aimed to develop a rapid molecular procedure for the detection of Escherichia coli, Shigella dysentery, and salmonella Typhiin food so as to minimize the public health hazard of food contamination. We used the Multiplex PCR method as rapid methods were tested for identification of Enterobacteriaceae species Escherichia coli as an indicator organism for food contamination and two strains of Enterobacteriaceae that causes food borne illness (namely Shigella dysentery and salmonella Typhi). The Multiplex PCR was performed to detect E. coli using Mdh primer pair, Salmonella Typhi using IpaB primer pair, and Shigella dysentery using IpaH1 primer pair. The sensitivity to detect E. coli, Salmonella Typhi, and Shigella dysentery in contaminated food in the concentration of the infective and the over infective doses were 100%, 96.3%, and 88.9% respectively for the three bacteria strains. There was no significant difference in the detection of the bacteria after incubation for 8 hours, 24 hours, or even without incubation period. There were no differences in the result of the samples that were contaminated artificially in laboratory and those obtained from the market. The Multiplex PCR method for identification of E. coli, Salmonella Typhi and Shigella dysentery was developed as a model for detection and risk assessment of the three bacteria in one program, and it is suitable for routine analysis.
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21
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Wu X, Chen Q, Yang C, Ning Q, Liu Z. An enhanced visual detection assay for Listeria monocytogenes in food based on isothermal amplified peroxidase-mimicking catalytic beacon. Food Control 2022. [DOI: 10.1016/j.foodcont.2021.108721] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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22
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Sun H, Lai P, Wu W, Heng H, Si S, Ye Y, Li J, Lyu H, Zou C, Guo M, Wang Y, Geng H, Liang J. MALDI-TOF MS Based Bacterial Antibiotics Resistance Finger Print for Diabetic Pedopathy. Front Chem 2022; 9:785848. [PMID: 35096767 PMCID: PMC8795630 DOI: 10.3389/fchem.2021.785848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Accepted: 12/27/2021] [Indexed: 11/13/2022] Open
Abstract
Diabetes mellitus has become a major global health issue. Currently, the use of antibiotics remains the best foundational strategy in the control of diabetic foot infections. However, the lack of accurate identification of pathogens and the empirical use of antibiotics at early stages of infection represents a non-targeted treatment approach with a poor curative effect that may increase the of bacterial drug resistance. Therefore, the timely identification of drug resistant bacteria is the key to increasing the efficacy of treatments for diabetic foot infections. The traditional identification method is based on bacterial morphology, cell physiology, and biochemistry. Despite the simplicity and low costs associated with this method, it is time-consuming and has limited clinical value, which delays early diagnosis and treatment. In the recent years, MALDI-TOF MS has emerged as a promising new technology in the field of clinical microbial identification. In this study, we developed a strategy for the identification of drug resistance in the diagnosis of diabetic foot infections using a combination of macro-proteomics and MALDI MS analysis. The macro-proteomics result was utilized to determine the differential proteins in the resistance group and the corresponding peptide fragments were used as the finger print in a MALDI MS analysis. This strategy was successfully used in the research of drug resistance in patients with diabetic foot infections and achieved several biomarkers that could be used as a finger print for 4 different drugs, including ceftazidime, piperacillin, levofloxacin, and tetracycline. This method can quickly confirm the drug resistance of clinical diabetic foot infections, which can help aid in the early treatment of patients.
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Affiliation(s)
- Haojie Sun
- Medical College, Soochow University, Suzhou, China
- Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou, China
| | - Peng Lai
- Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou, China
| | - Wei Wu
- Affiliated Hospital of Xuzhou Medical University, Xuzhou, China
| | - Hao Heng
- Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou, China
| | - Shanwen Si
- Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou, China
| | - Yan Ye
- Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou, China
| | - Jiayi Li
- Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou, China
| | - Hehe Lyu
- Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou, China
| | - Caiyan Zou
- Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou, China
| | - Mengzhe Guo
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, Xuzhou Medical University, Xuzhou, China
| | - Yu Wang
- Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou, China
- *Correspondence: Jun Liang, ; Houfa Geng, ; Yu Wang,
| | - Houfa Geng
- Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou, China
- *Correspondence: Jun Liang, ; Houfa Geng, ; Yu Wang,
| | - Jun Liang
- Medical College, Soochow University, Suzhou, China
- Xuzhou Central Hospital, Xuzhou Clinical School of Xuzhou Medical University, Xuzhou, China
- *Correspondence: Jun Liang, ; Houfa Geng, ; Yu Wang,
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23
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Carvalho GC, Dua K, Gupta G, Bugno A, Pinto TDJA. Reflection about the hemodialysis water microbiological quality in Brazil. BRAZ J PHARM SCI 2022. [DOI: 10.1590/s2175-97902022e19235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
| | - Kamal Dua
- The University of Newcastle, Australia; Hunter Medical Research Institute, Australia; University of Technology Sydney, Australia
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24
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Zand E, Froehling A, Schoenher C, Zunabovic-Pichler M, Schlueter O, Jaeger H. Potential of Flow Cytometric Approaches for Rapid Microbial Detection and Characterization in the Food Industry-A Review. Foods 2021; 10:3112. [PMID: 34945663 PMCID: PMC8701031 DOI: 10.3390/foods10123112] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Revised: 11/14/2021] [Accepted: 11/16/2021] [Indexed: 12/11/2022] Open
Abstract
As microbial contamination is persistent within the food and bioindustries and foodborne infections are still a significant cause of death, the detection, monitoring, and characterization of pathogens and spoilage microorganisms are of great importance. However, the current methods do not meet all relevant criteria. They either show (i) inadequate sensitivity, rapidity, and effectiveness; (ii) a high workload and time requirement; or (iii) difficulties in differentiating between viable and non-viable cells. Flow cytometry (FCM) represents an approach to overcome such limitations. Thus, this comprehensive literature review focuses on the potential of FCM and fluorescence in situ hybridization (FISH) for food and bioindustry applications. First, the principles of FCM and FISH and basic staining methods are discussed, and critical areas for microbial contamination, including abiotic and biotic surfaces, water, and air, are characterized. State-of-the-art non-specific FCM and specific FISH approaches are described, and their limitations are highlighted. One such limitation is the use of toxic and mutagenic fluorochromes and probes. Alternative staining and hybridization approaches are presented, along with other strategies to overcome the current challenges. Further research needs are outlined in order to make FCM and FISH even more suitable monitoring and detection tools for food quality and safety and environmental and clinical approaches.
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Affiliation(s)
- Elena Zand
- Department of Food Science and Technology, Institute of Food Technology, University of Natural Resources and Life Sciences Vienna (BOKU), 1190 Vienna, Austria;
| | - Antje Froehling
- Leibniz Institute for Agricultural Engineering and Bioeconomy, Quality and Safety of Food and Feed, 14469 Potsdam, Germany; (A.F.); (O.S.)
| | - Christoph Schoenher
- Institute of Sanitary Engineering and Water Pollution Control, University of Natural Resources and Life Sciences, 1190 Vienna, Austria; (C.S.); (M.Z.-P.)
| | - Marija Zunabovic-Pichler
- Institute of Sanitary Engineering and Water Pollution Control, University of Natural Resources and Life Sciences, 1190 Vienna, Austria; (C.S.); (M.Z.-P.)
| | - Oliver Schlueter
- Leibniz Institute for Agricultural Engineering and Bioeconomy, Quality and Safety of Food and Feed, 14469 Potsdam, Germany; (A.F.); (O.S.)
| | - Henry Jaeger
- Department of Food Science and Technology, Institute of Food Technology, University of Natural Resources and Life Sciences Vienna (BOKU), 1190 Vienna, Austria;
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25
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Ayhan K, Coşansu S, Orhan-Yanıkan E, Gülseren G. Advance methods for the qualitative and quantitative determination of microorganisms. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106188] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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26
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Rahman MM, Azad MOK, Uddain J, Adnan M, Ali MC, Al-Mujahidy SKMJ, Roni MZK, Rahman MS, Islam MJ, Rahman MH, Choi KY, Naznin MT. Microbial Quality Assessment and Efficacy of Low-Cost Disinfectants on Fresh Fruits and Vegetables Collected from Urban Areas of Dhaka, Bangladesh. Foods 2021; 10:1325. [PMID: 34207589 PMCID: PMC8227336 DOI: 10.3390/foods10061325] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 06/01/2021] [Accepted: 06/03/2021] [Indexed: 01/21/2023] Open
Abstract
This study aimed to examine the total viable bacteria (TVBC); total coliform (TCC); fecal coliform (TFC); pathogenic Pseudomonas spp., Staphylococcus aureus, and total fungi (TF); and the effect of different low-cost disinfectants (sterile water, salt water, blanched, and vinegar) in decontamination of 12 types of fruit and 10 types of vegetables. In fruit samples, the lowest TVBC was enumerated at 3.18 ± 0.27 log CFU/g in Indian gooseberry and the highest at 6.47 ± 0.68 log CFU/g in guava. Staphylococci (2.04 ± 0.53-5.10 ± 0.02 log CFU/g), Pseudomonas (1.88 ± 0.03-5.38 ± 0.08 log CFU/g), and total fungi (2.60 ± 0.18-7.50 ± 0.15 log CFU/g) were found in all fruit samples; however, no Salmonella was detected in fruit samples. Similarly, the lowest TVBC recorded 5.67± 0.49 log CFU/g in cucumber and the highest 7.37 ± 0.06 log CFU/g in yard long bean. The Staphylococci (3.48 ± 0.13-4.81 ± 0.16 log CFU/g), Pseudomonas (3.57± 0.21- 4.75 ± 0.23 log CFU/g), TCC (1.85 ± 1.11-56.50 ± 37.14 MPN/g), TFC (1.76 ± 0.87- 3.78 ± 3.76 MPN/g), and TF (3.79 ± 0.18-4.40 ± 0.38 log CFU/g) were recorded in all vegetables samples, but no Salmonella was detected in yard long bean, pointed gourd, carrot, tomato, cucumber, or brinjal. However, vinegar showed the highest microbial load reduction of selected fruit and vegetables among the different treatments. With vinegar treatment, the highest reduction of TVBC (1.61-log) and TF (2.54-log) was observed for fruits, and TVBC (2.31-log) and TF (2.41-log) for vegetables. All the disinfectant treatments resulted in significant (p < 0.01) bacterial load reduction compared to control for the studied fruits and vegetable samples.
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Affiliation(s)
- Md. Mafizur Rahman
- Department of Biotechnology and Genetic Engineering, Faculty of Biological Sciences, Islamic University, Kushtia 7003, Bangladesh; (M.M.R.); (M.C.A.); (S.M.J.A.-M.)
| | - Md. Obyedul Kalam Azad
- Department of Bio-Health Convergence, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Korea; (M.O.K.A.); (M.A.); (M.J.I.); (M.H.R.)
| | - Jasim Uddain
- Department of Horticulture, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh;
| | - Md. Adnan
- Department of Bio-Health Convergence, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Korea; (M.O.K.A.); (M.A.); (M.J.I.); (M.H.R.)
| | - Md. Chayan Ali
- Department of Biotechnology and Genetic Engineering, Faculty of Biological Sciences, Islamic University, Kushtia 7003, Bangladesh; (M.M.R.); (M.C.A.); (S.M.J.A.-M.)
| | - SK. Md. Jakaria Al-Mujahidy
- Department of Biotechnology and Genetic Engineering, Faculty of Biological Sciences, Islamic University, Kushtia 7003, Bangladesh; (M.M.R.); (M.C.A.); (S.M.J.A.-M.)
| | - Md. Zohurul Kadir Roni
- Tropical Agriculture Research Front, Japan International Research Center for Agricultural Sciences (JIRCAS), 1091-1 Maezato-Kawarabaru, Ishigaki, Okinawa 907-0002, Japan;
| | - Mohammed Saifur Rahman
- Department of Biosystems and Technology, Swedish University of Agricultural Sciences, 75007 Alnarp, Sweden;
| | - Md. Jahirul Islam
- Department of Bio-Health Convergence, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Korea; (M.O.K.A.); (M.A.); (M.J.I.); (M.H.R.)
| | - Md. Hafizur Rahman
- Department of Bio-Health Convergence, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Korea; (M.O.K.A.); (M.A.); (M.J.I.); (M.H.R.)
| | - Ki Young Choi
- Department of Controlled Agriculture, College of Agriculture and Life Sciences, Kangwon National University, Chuncheon 24341, Korea
| | - Most Tahera Naznin
- Department of Biosystems and Technology, Swedish University of Agricultural Sciences, 75007 Alnarp, Sweden;
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Rajagopal R, Barnes CA, David JM, Goseland J, Goseland J. Evaluation of a commercial loop-mediated isothermal amplification assay, 3M TM Molecular Detection Assay 2 - Campylobacter, for the detection of Campylobacter from poultry matrices. Br Poult Sci 2021; 62:404-413. [PMID: 33517711 DOI: 10.1080/00071668.2021.1879992] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
1. The objective of this study was to evaluate performance of a commercial loop-mediated isothermal amplification (LAMP) method as an alternative method for the detection of Campylobacter spp. in primary production samples, poultry rinses and raw poultry products, as compared to the US Department of Agriculture Food Inspection Service Microbiology Laboratory Guide Book PCR reference method, MLG 41A.2. The Campylobacter spp. LAMP was used in conjunction with a ready-to-use enrichment broth that does not require microaerophilic incubation. After enrichment, boot swabs from poultry farms, carcase rinses and raw poultry products were tested by the LAMP method and the MLG 41A PCR method.3. The ready-to-use enrichment broth enabled the growth of Campylobacter spp. within 22 to 28 hours under aerobic incubation conditions. The LAMP method enabled Campylobacter detection in the enriched samples of various poultry matrices and had equivalent sensitivity and specificity to the MLG 41A PCR method.4. No significant difference (95% confidence interval) was found between the alternative and the MLG 41A PCR method, as determined by probability of detection analysis, except for neutralising buffered peptone water post-chill rinsates. For the post-chill neutralising buffered peptone water rinsates, the LAMP method had significantly higher confirmed portions.
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Affiliation(s)
| | | | | | - J Goseland
- WBA Analytical Laboratories, Inc., Springdale, AR, USA
| | - J Goseland
- WBA Analytical Laboratories, Inc., Springdale, AR, USA
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Oliveira R, Almeida C, Azevedo NF. Detection of Microorganisms by Fluorescence In Situ Hybridization Using Peptide Nucleic Acid. Methods Mol Biol 2021; 2105:217-230. [PMID: 32088873 DOI: 10.1007/978-1-0716-0243-0_13] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Fluorescence in situ hybridization (FISH) is a 30-year-old technology that has evolved continuously and is now one of the most well-established molecular biology techniques. Traditionally, DNA probes are used for in situ hybridization. However, synthetic molecules are emerging as very promising alternatives, providing better hybridization performance and making FISH procedures easier and more efficient. In this chapter, we describe a universal FISH protocol, using nucleic acid probes, for the detection of bacteria. This protocol should be easily applied to different microorganisms as a way of identifying in situ relevant microorganisms (including pathogens) and their distribution patterns in different types of samples.
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Affiliation(s)
- Ricardo Oliveira
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Porto, Portugal.,INIAV - National Institute for Agrarian and Veterinarian Research, Vairao, Portugal
| | - Carina Almeida
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Porto, Portugal.,INIAV - National Institute for Agrarian and Veterinarian Research, Vairao, Portugal.,CEB - Centre of Biological Engineering, University of Minho, Braga, Portugal
| | - Nuno F Azevedo
- LEPABE - Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Porto, Portugal.
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Brito FAED, Bezerra LCR, Melo AMA, Furtado RF, Borges MDF, Figueiredo EATD. Validação de métodos microbiológicos alternativos: uma visão geral. BRAZILIAN JOURNAL OF FOOD TECHNOLOGY 2021. [DOI: 10.1590/1981-6723.02320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Resumo O desenvolvimento de novos métodos de análise microbiológica requer uma avaliação da igualdade ou superioridade deste em relação a um método padrão ouro − método rotineiramente utilizado. Este processo de avaliação denomina-se validação. O método é validado se seu desempenho estiver satisfatoriamente de acordo com os parâmetros analisados. Neste trabalho, abordamos os critérios para a validação de novos métodos de análise microbiológica da AOAC, FDA e da ISO 16140.
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Releasing bacteria from functional magnetic beads is beneficial to MALDI-TOF MS based identification. Talanta 2020; 225:121968. [PMID: 33592721 DOI: 10.1016/j.talanta.2020.121968] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 11/12/2020] [Accepted: 11/19/2020] [Indexed: 01/08/2023]
Abstract
Bacterial infections are the key cause of morbidity and mortality worldwide. Matrix-assisted laser desorption ionization time of flight mass spectrometry (MALDI-TOF MS)-based bacterial identification has been widely accepted in the clinic. Functional material, such as rabbit immunoglobulin G-modified Fe3O4 (IgG@Fe3O4) and fragment crystallizable mannose binding lectin-modified Fe3O4 (FcMBL@Fe3O4), is used to capture bacteria from biological samples for MALDI-TOF MS identification, and the bacteria MS signals are usually obtained by directly smearing enriched bacteria on a MALDI target with MALDI matrix solution. However, the accuracy of identification based on MALDI-TOF MS may be affected by the presence of functional molecules, especially proteins, resulting in errors in the comparison with the standard bacterial spectra in the database. Moreover, the long-term presence of the magnetic beads on the MALDI-TOF target may reduce the instrument service life. In this study, we constructed FcMBL@Fe3O4 and used it to capture bacteria from both aqueous solution and bovine blood, and the bacterial identification accuracy based on different target preparation methods was compared. In the presence of Ca2+, the similarity scores for bacteria identified with FcMBL@Fe3O4 were ~88% and ~82% for Staphylococcus. aureus and Escherichia coli, respectively. In the presence of ethylenediaminetetraacetic acid (EDTA), bacteria separate from FcMBL@Fe3O4, resulting in similarity scores of ~96% and ~92% for S. aureus and E. coli, respectively. These results indicate that the functional proteins on the surface of nanoparticles affect the accuracy of identification accuracy based on the MALDI-TOF MS database. Thus, the release of bacteria from the functional material could increase the identification accuracy and be beneficial for maintaining the instrument.
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Vatić S, Mirković N, Milošević JR, Jovčić B, Polović NĐ. Broad range of substrate specificities in papain and fig latex enzymes preparations improve enumeration of Listeria monocytogenes. Int J Food Microbiol 2020; 334:108851. [PMID: 32911158 DOI: 10.1016/j.ijfoodmicro.2020.108851] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 08/21/2020] [Accepted: 08/24/2020] [Indexed: 11/28/2022]
Abstract
Numerous applications of proteolytic enzymes include dissociation of fermented meat products for the enumeration of `foodborne pathogenic bacteria. The use of trypsin for this cause is abandoned due to the high concentration of the enzyme affecting released bacteria. Papain, as a suggested replacement, and fig latex preparation with high extent of papain-like enzymes have the potential to be applied for bacteria enumeration. Both enzymatic preparations, originating from papaya and fig, showed a broader range of substrate specificities including gelatinolytic activity, especially prominent in the case of ficin and attributed to both, cysteine protease ficin and serine protease by the analysis of 2D zymography with specific inhibitors. The activity towards native collagen, mild in the case of papain, and extensive in the case of fig latex was proved by structural analysis of digested collagen by infrared spectroscopy. Further exploration of their potential for dissociation of fermented meat products showed that both papain and fig latex enzymes are stable in the presence of detergents Tween 20 and Triton X-100 and effective in the enumeration of Listeria monocytogenes. Gelatenolytic activity, and at least partial collagenolytic activity and stability in procedure conditions make papaya and fig latex proteases potent for this application in significantly lower concentrations than previously used enzymes. As a mixture of proteolytic enzymes with divergent characteristics, fig latex preparation shows higher efficiency in Listeria monocytogenes release than papain, conserved even in the presence of stronger non-ionic detergent Triton X-100.
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Affiliation(s)
- Saša Vatić
- Department of Biochemistry, University of Belgrade - Faculty of Chemistry, Belgrade, Serbia; Institute for Chemistry in Medicine, University of Belgrade - Faculty of Medicine, Belgrade, Serbia
| | - Nemanja Mirković
- Laboratory for Molecular Microbiology, Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia; Department for Food Microbiology, Faculty of Agriculture, University of Belgrade, Belgrade, Serbia
| | - Jelica R Milošević
- Department of Biochemistry, University of Belgrade - Faculty of Chemistry, Belgrade, Serbia
| | - Branko Jovčić
- Laboratory for Molecular Microbiology, Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, Serbia; Department of Biochemistry and Molecular Biology, University of Belgrade - Faculty of Biology, Belgrade, Serbia
| | - Natalija Đ Polović
- Department of Biochemistry, University of Belgrade - Faculty of Chemistry, Belgrade, Serbia.
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Bertelsen CV, Franco JC, Skands GE, Dimaki M, Svendsen WE. Investigating the Use of Impedance Flow Cytometry for Classifying the Viability State of E. coli. SENSORS (BASEL, SWITZERLAND) 2020; 20:E6339. [PMID: 33172055 PMCID: PMC7664255 DOI: 10.3390/s20216339] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 10/29/2020] [Accepted: 11/03/2020] [Indexed: 01/22/2023]
Abstract
Bacteria detection, counting and analysis is of great importance in several fields. When viability plays a major role in decision making, the counting of colony-forming units grown on agar plates remains the gold standard. However, because plate counts depend on the growth of the bacteria, it is a slow procedure and only works with culturable species. Impedance flow cytometry (IFC) is a promising technology for particle detection, counting and characterization. It relies on the perturbation of an electric field by particles flowing through a microfluidic channel. The perturbation is directly related to the electrical properties of the particles, and therefore provides information about their composition and structure. In this work we investigate whether IFC can be used to differentiate viable cells from inactivated cells. Our findings demonstrate that the specific viability state of the bacteria has to be considered, but that with proper characterization thresholds, IFC can be used to classify bacterial viability states. By using three different inactivation methods-ethanol, heat and autoclavation-we have been able to show that the impedance response of Escherichia coli depends on its viability state, but that the specific response depends on the inactivation method. With these findings we expect to be able to optimize IFC for more reliable bacteria detection and counting in the future.
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Affiliation(s)
- Christian Vinther Bertelsen
- DTU Bioengineering, Technical University of Denmark, Søltofts Plads 221, 2800 Kgs. Lyngby, Denmark; (J.C.F.); (M.D.); (W.E.S.)
- SBT Instruments A/S, Symfonivej 37, 2730 Herlev, Denmark;
| | - Julio César Franco
- DTU Bioengineering, Technical University of Denmark, Søltofts Plads 221, 2800 Kgs. Lyngby, Denmark; (J.C.F.); (M.D.); (W.E.S.)
| | | | - Maria Dimaki
- DTU Bioengineering, Technical University of Denmark, Søltofts Plads 221, 2800 Kgs. Lyngby, Denmark; (J.C.F.); (M.D.); (W.E.S.)
| | - Winnie Edith Svendsen
- DTU Bioengineering, Technical University of Denmark, Søltofts Plads 221, 2800 Kgs. Lyngby, Denmark; (J.C.F.); (M.D.); (W.E.S.)
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Alafeef M, Moitra P, Pan D. Nano-enabled sensing approaches for pathogenic bacterial detection. Biosens Bioelectron 2020; 165:112276. [PMID: 32729465 DOI: 10.1016/j.bios.2020.112276] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/30/2020] [Accepted: 05/04/2020] [Indexed: 01/16/2023]
Abstract
Infectious diseases caused by pathogenic bacteria, especially antibiotic-resistant bacteria, are one of the biggest threats to global health. To date, bacterial contamination is detected using conventional culturing techniques, which are highly dependent on expert users, limited by the processing time and on-site availability. Hence, real-time and continuous monitoring of pathogen levels is required to obtain valuable information that could assist health agencies in guiding prevention and containment of pathogen-related outbreaks. Nanotechnology-based smart sensors are opening new avenues for early and rapid detection of such pathogens at the patient's point-of-care. Nanomaterials can play an essential role in bacterial sensing owing to their unique optical, magnetic, and electrical properties. Carbon nanoparticles, metallic nanoparticles, metal oxide nanoparticles, and various types of nanocomposites are examples of smart nanomaterials that have drawn intense attention in the field of microbial detection. These approaches, together with the advent of modern technologies and coupled with machine learning and wireless communication, represent the future trend in the diagnosis of infectious diseases. This review provides an overview of the recent advancements in the successful harnessing of different nanoparticles for bacterial detection. In the beginning, we have introduced the fundamental concepts and mechanisms behind the design and strategies of the nanoparticles-based diagnostic platform. Representative research efforts are highlighted for in vitro and in vivo detection of bacteria. A comprehensive discussion is then presented to cover the most commonly adopted techniques for bacterial identification, including some seminal studies to detect bacteria at the single-cell level. Finally, we discuss the current challenges and a prospective outlook on the field, together with the recommended solutions.
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Affiliation(s)
- Maha Alafeef
- Bioengineering Department, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States; Biomedical Engineering Department, Jordan University of Science and Technology, Irbid, 22110, Jordan; Department of Diagnostic Radiology and Nuclear Medicine, University of Maryland Baltimore School of Medicine, 670 W Baltimore St., Baltimore, MD, 21201, United States
| | - Parikshit Moitra
- Department of Diagnostic Radiology and Nuclear Medicine, University of Maryland Baltimore School of Medicine, 670 W Baltimore St., Baltimore, MD, 21201, United States; Department of Pediatrics, University of Maryland Baltimore School of Medicine, 670 W Baltimore St., Baltimore, MD, 21201, United States
| | - Dipanjan Pan
- Bioengineering Department, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, United States; Department of Diagnostic Radiology and Nuclear Medicine, University of Maryland Baltimore School of Medicine, 670 W Baltimore St., Baltimore, MD, 21201, United States; Department of Pediatrics, University of Maryland Baltimore School of Medicine, 670 W Baltimore St., Baltimore, MD, 21201, United States; Department of Chemical, Biochemical and Environmental Engineering, University of Maryland Baltimore County, 1000 Hiltop Circle, Baltimore, MD, 21250, United States.
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Almeida TTD, Andretta M, Ferreira LR, Carvalho AFD, Nero LA. The complex microbiota of artisanal cheeses interferes in the performance of enumeration protocols for lactic acid bacteria and staphylococci. Int Dairy J 2020. [DOI: 10.1016/j.idairyj.2020.104791] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Nero LA, de Freitas CF, Flores Carvalho LMV, Constantino C. 3M Petrifilm Lactic Acid Bacteria Count Plate Is a Reliable Tool for Enumerating Lactic Acid Bacteria in Bacon. J Food Prot 2020; 83:1757-1763. [PMID: 32421789 DOI: 10.4315/jfp-20-155] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 05/15/2020] [Indexed: 12/25/2022]
Abstract
ABSTRACT This study aimed to evaluate the behavior of Petrifilm Lactic Acid Bacteria Count Plates (PLAB) as an alternative methodology to enumerate lactic acid bacteria (LAB) in bacon. Bacon samples (n = 40) were obtained from retail sale, 10-fold diluted with buffered peptone water (BPW, 0.2% [w/v]) and Letheen broth, and subjected to LAB enumeration according to four protocols: (i) de Man Rogosa Sharpe (MRS) agar, pH 5.7, 30°C; (ii) MRS, pH 5.7, 30°C, anaerobiosis; (iii) all-purpose Tween agar (APT), 25°C; and (iv) PLAB, 30°C. Colonies were enumerated at 24, 48, and 72 h, and the results expressed as log CFU per gram for comparison by analysis of variance and regression (P < 0.05). Furthermore, colonies were randomly selected and characterized as LAB (Gram staining and catalase). Mean LAB counts from MRS and PLAB did not present significant differences independently of incubation time or diluent (P > 0.05), whereas counts in APT with BPW after 24 h were significantly lower (P < 0.05). PLAB counts with BPW (24, 48, and 72 h) presented significant correlation with MRS (r ranging from 0.87 to 0.89; in anaerobiosis, r ranging from 0.94 to 0.95) and APT (r ranging from 0.84 to 0.86). With Letheen broth, PLAB (24, 48, and 72 h) presented significant correlation with MRS (r ranging from 0.92 to 0.94; in anaerobiosis, r ranging from 0.93 to 0.96) and APT (r ranging from 0.77 to 0.79). In total, 1,032 colonies (97%) from 1,063 colonies were characterized as LAB. Thus, PLAB can be considered as an alternative tool for enumerating LAB in bacon, with reliable results even after 24 h of incubation. HIGHLIGHTS
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Affiliation(s)
- LuÍs Augusto Nero
- Laboratório de Inspeção de Produtos de Origem Animal, Universidade Federal de Viçosa, Departamento de Veterinária, Campus Viçosa, Centro, 36570-900 Viçosa, Minas Gerais, Brazil (ORCID: https://orcid.org/0000-0002-4954-5824 [L.A.N.])
| | - Caio Fialho de Freitas
- Laboratório de Inspeção de Produtos de Origem Animal, Universidade Federal de Viçosa, Departamento de Veterinária, Campus Viçosa, Centro, 36570-900 Viçosa, Minas Gerais, Brazil (ORCID: https://orcid.org/0000-0002-4954-5824 [L.A.N.])
| | - Lara Maria Vieira Flores Carvalho
- Laboratório de Inspeção de Produtos de Origem Animal, Universidade Federal de Viçosa, Departamento de Veterinária, Campus Viçosa, Centro, 36570-900 Viçosa, Minas Gerais, Brazil (ORCID: https://orcid.org/0000-0002-4954-5824 [L.A.N.])
| | - Cristina Constantino
- 3M Food Safety, 3M do Brasil, Via Anhanguera, s/n - Nova Veneza, 13181-900 Sumaré, São Paulo, Brazil
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Lamanna L, Rizzi F, Bhethanabotla VR, De Vittorio M. Conformable surface acoustic wave biosensor for E-coli fabricated on PEN plastic film. Biosens Bioelectron 2020; 163:112164. [DOI: 10.1016/j.bios.2020.112164] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 03/19/2020] [Accepted: 03/20/2020] [Indexed: 12/11/2022]
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Ripolles-Avila C, Martínez-Garcia M, Capellas M, Yuste J, Fung DYC, Rodríguez-Jerez JJ. From hazard analysis to risk control using rapid methods in microbiology: A practical approach for the food industry. Compr Rev Food Sci Food Saf 2020; 19:1877-1907. [PMID: 33337076 DOI: 10.1111/1541-4337.12592] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 05/14/2020] [Accepted: 05/15/2020] [Indexed: 12/14/2022]
Abstract
The prevention of foodborne diseases is one of the main objectives of health authorities. To this effect, analytical techniques to detect and/or quantify the microbiological contamination of foods prior to their release onto the market are required. Management and control of foodborne pathogens have generally been based on conventional detection methodologies, which are not only time-consuming and labor-intensive but also involve high consumable materials costs. However, this management perspective has changed over time given that the food industry requires efficient analytical methods that obtain rapid results. This review covers the historical context of traditional methods and their passage in time through to the latest developments in rapid methods and their implementation in the food sector. Improvements and limitations in the detection of the most relevant pathogens are discussed from a perspective applicable to the current situation in the food industry. Considering efforts that are being done and recent developments, rapid and accurate methods already used in the food industry will be also affordable and portable and offer connectivity in near future, which improves decision-making and safety throughout the food chain.
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Affiliation(s)
- Carolina Ripolles-Avila
- Area of Human Nutrition and Food Science, Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Maria Martínez-Garcia
- Area of Human Nutrition and Food Science, Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Marta Capellas
- Area of Food Technology, Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Josep Yuste
- Area of Food Technology, Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Daniel Y C Fung
- Call Hall, Department of Animal Sciences and Industry, Kansas State University, Manhattan, Kansas
| | - José-Juan Rodríguez-Jerez
- Area of Human Nutrition and Food Science, Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Barcelona, Spain
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Emerging electrochemical biosensing approaches for detection of Listeria monocytogenes in food samples: An overview. Trends Food Sci Technol 2020. [DOI: 10.1016/j.tifs.2020.03.031] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Carvalho GC, Bugno A, Almodovar AAB, Silva FPDLE, Pinto TDJA. Validation and applicability of an alternative method for dialysis water and dialysate quality analysis. J Bras Nefrol 2020; 42:163-174. [PMID: 32364558 PMCID: PMC7427643 DOI: 10.1590/2175-8239-jbn-2019-0203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 11/12/2019] [Indexed: 05/30/2023] Open
Abstract
INTRODUCTION In hemodialysis, patients are exposed to a large volume of water, which may lead to fatal risks if not meeting quality standards. This study aimed to validate an alternative method for monitoring microbiological quality of treated water and assess its applicability in dialysis and dialysate analysis, to allow corrective actions in real-time. METHODS Validation and applicability were analyzed by conventional and alternative methods. For validation, E. coli standard endotoxin was diluted with apyrogenic water in five concentrations. For the applicability analysis, treated water for dialysis was collected from different points in the treatment system (reverse osmosis, drainage canalization at the storage tank bottom, reuse, and loop), and dialysate was collected from four machines located in different rooms in the hemodialysis sector. RESULTS The validation results were in accordance with the Brazilian Pharmacopoeia acceptance criteria, except for the last two concentrations analyzed. In addition, the ruggedness criterion performed under the US Pharmacopoeia was in agreement with the results. DISCUSSION A limiting factor in the applicability analysis was the absence of the endotoxin maximum permitted level in dialysate by the Brazilian legislation. When comparing the analysis time, the alternative method was more time-consuming than the conventional one. This suggests that the alternative method is effective in the case of few analyses, that is, real-time analyses, favoring corrective actions promptly. On the other hand, it does not support the implementation of the alternative method in a laboratory routine due to the high demand for analyses.
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Affiliation(s)
- Gabriela Corrêa Carvalho
- Universidade de São Paulo, Faculdade de Ciências Farmacêuticas, Departamento de Farmácia, São Paulo, SP, Brasil
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Fontecha-Umaña F, Ríos-Castillo AG, Ripolles-Avila C, Rodríguez-Jerez JJ. Antimicrobial Activity and Prevention of Bacterial Biofilm Formation of Silver and Zinc Oxide Nanoparticle-Containing Polyester Surfaces at Various Concentrations for Use. Foods 2020; 9:E442. [PMID: 32268566 PMCID: PMC7230149 DOI: 10.3390/foods9040442] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 04/01/2020] [Accepted: 04/02/2020] [Indexed: 12/13/2022] Open
Abstract
Food contact surfaces are primary sources of bacterial contamination in food industry processes. With the objective of preventing bacterial adhesion and biofilm formation on surfaces, this study evaluated the antimicrobial activity of silver (Ag-NPs) and zinc oxide (ZnO-NPs) nanoparticle-containing polyester surfaces (concentration range from 400 ppm to 850 ppm) using two kinds of bacteria, Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli), and the prevention of bacterial biofilm formation using the pathogen Listeria monocytogenes. The results of antimicrobial efficacy (reductions ≥ 2 log CFU/cm2) showed that at a concentration of 850 ppm, ZnO-NPs were effective against only E. coli (2.07 log CFU/cm2). However, a concentration of 400 ppm of Ag-NPs was effective against E. coli (4.90 log CFU/cm2) and S. aureus (3.84 log CFU/cm2). Furthermore, a combined concentration of 850 ppm Ag-NPs and 400 ppm ZnO-NPs showed high antimicrobial efficacy against E. coli (5.80 log CFU/cm2) and S. aureus (4.11 log CFU/cm2). The results also showed a high correlation between concentration levels and the bacterial activity of Ag-ZnO-NPs (R2 = 0.97 for S. aureus, and R2 = 0.99 for E. coli). They also showed that unlike individual action, the joint action of Ag-NPs and ZnO-NPs has high antimicrobial efficacy for both types of microorganisms. Moreover, Ag-NPs prevent the biofilm formation of L. monocytogenes in humid conditions of growth at concentrations of 500 ppm. Additional studies under different conditions are needed to test the durability of nanoparticle containing polyester surfaces with antimicrobial properties to optimize their use.
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Affiliation(s)
| | | | | | - José Juan Rodríguez-Jerez
- Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Travessera dels Turons s/n. Bellaterra, 08193 Barcelona, Spain; (F.F.-U.); (A.G.R.-C.); (C.R.-A.)
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Nyhan L, Begley M, Johnson N, Callanan M. An evaluation of Lux technology as an alternative methodology to determine growth rates of Listeria in laboratory media and complex food matrices. Int J Food Microbiol 2020; 317:108442. [DOI: 10.1016/j.ijfoodmicro.2019.108442] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 09/04/2019] [Accepted: 11/10/2019] [Indexed: 11/16/2022]
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Luo F, Li Z, Dai G, Lu Y, He P, Wang Q. Simultaneous detection of different bacteria by microchip electrophoresis combined with universal primer-duplex polymerase chain reaction. J Chromatogr A 2020; 1615:460734. [DOI: 10.1016/j.chroma.2019.460734] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Revised: 11/22/2019] [Accepted: 11/25/2019] [Indexed: 12/17/2022]
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Metagenomic insights into the changes in microbial community and antimicrobial resistance genes associated with different salt content of red pepper (Capsicum annuum L.) sauce. Food Microbiol 2020; 85:103295. [DOI: 10.1016/j.fm.2019.103295] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Revised: 07/03/2019] [Accepted: 08/07/2019] [Indexed: 01/06/2023]
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Translating 'big data': better understanding of host-pathogen interactions to control bacterial foodborne pathogens in poultry. Anim Health Res Rev 2020; 21:15-35. [PMID: 31907101 DOI: 10.1017/s1466252319000124] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Recent technological advances has led to the generation, storage, and sharing of colossal sets of information ('big data'), and the expansion of 'omics' in science. To date, genomics/metagenomics, transcriptomics, proteomics, and metabolomics are arguably the most ground breaking approaches in food and public safety. Here we review some of the recent studies of foodborne pathogens (Campylobacter spp., Salmonella spp., and Escherichia coli) in poultry using big data. Genomic/metagenomic approaches have reveal the importance of the gut microbiota in health and disease. They have also been used to identify, monitor, and understand the epidemiology of antibiotic-resistance mechanisms and provide concrete evidence about the role of poultry in human infections. Transcriptomics studies have increased our understanding of the pathophysiology and immunopathology of foodborne pathogens in poultry and have led to the identification of host-resistance mechanisms. Proteomic/metabolomic approaches have aided in identifying biomarkers and the rapid detection of low levels of foodborne pathogens. Overall, 'omics' approaches complement each other and may provide, at least in part, a solution to our current food-safety issues by facilitating the development of new rapid diagnostics, therapeutic drugs, and vaccines to control foodborne pathogens in poultry. However, at this time most 'omics' approaches still remain underutilized due to their high cost and the high level of technical skills required.
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Silveira FMR, Baptista ATA, Dutra TV, de Abreu Filho BA, Gomes RG, Bergamasco R. Application of Moringa oleifera Lam. fractionated proteins for inactivation of Escherichia coli from water. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2020; 81:265-273. [PMID: 32333659 DOI: 10.2166/wst.2020.094] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Chemical products traditionally used in the disinfection of water bodies often pose human health risks. For this reason, studies on natural coagulants such as Moringa oleifera Lam. represent an alternative for the inactivation of pathogenic microorganisms, among which is Escherichia coli. This study evaluated the effect of different concentrations of coagulants obtained from Moringa seed extracts and their protein fractions in the inactivation of E. coli during the coagulation/flocculation process. The coagulants studied were the aqueous extract, saline extract and protein fractions albumin and globulin, highlighting that the protein fractions were more effective on inactivating E. coli. The protein fraction globulin at a concentration of 10.0 mg L-1 showed bactericidal effects against E. coli within 18 min, whereas the albumin showed a bacteriostatic effect within 48 min because it isolated colonies in the sediment sample.
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Affiliation(s)
| | | | - Tatiane V Dutra
- Department of Basic Health Sciences, State University of Maringá, Paraná, Brazil
| | | | - Raquel G Gomes
- Department of Food Engineering, State University of Maringá, Paraná, Brazil
| | - Rosângela Bergamasco
- Department of Chemical Engineering, State University of Maringá, Paraná, Brazil and Colombo Avenue 5790, University of Maringá, Brazil E-mail:
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Lee Y, Yoon Y, Seo Y, Kim S, Ha J, Lee J, Choi Y, Oh H, Kim Y, Kang J, Park E, Kim WI, Lee S. Combined Enrichment and Quantitative Polymerase Chain Reaction to Improve Sensitivity and Reduce Time of Detection of Listeria monocytogenes in Mushrooms. Foodborne Pathog Dis 2019; 17:276-283. [PMID: 31855070 DOI: 10.1089/fpd.2019.2688] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
This study evaluated a combined method for the detection of Listeria monocytogenes in mushrooms, involving enrichment and quantitative real-time polymerase chain reaction (qPCR), to improve sensitivity and reduce detection time. The growth of L. monocytogenes was evaluated in Listeria enrichment broth (LEB) with modified carbon and nitrogen sources, increasing sodium concentrations, and added micronutrients. Primers targeting the L. monocytogenes iap (iap1 and iap2), hlyA (hlyA1-hlyA6), and prfA (prfA1-prfA4) genes were developed and their sensitivity and specificity were evaluated. The greatest increase in L. monocytogenes cell count was observed after 6-h incubation at 30°C in LEB+2 × FAC (LEB plus 20 mL/L ferric ammonium citrate), where cell count increased by 1.4 log CFU (colony-forming unit)/mL, compared with 0.9 log CFU/mL in LEB (p < 0.05). iap2 primers targeting the iap gene showed high specificity and were the most sensitive among those tested, with a detection limit of 2 log CFU/mL in LEB medium, 3.1 log CFU/g in golden needle mushroom, and 3.5 log CFU/g in large oyster mushroom. When applied to detection in golden needle mushrooms, a combination of 3-h incubation in LEB+2 × FAC medium and qPCR analysis with iap2 primers permitted detection of L. monocytogenes, even at an inoculum of 1 log CFU/g. Similarly, in large oyster mushrooms, 10-h enrichment in LEB+2 × FAC medium resulted in a cell count of 3.7 log CFU/g. These results indicate that a combined detection method, using LEB+2 × FAC medium for enrichment followed by qPCR with iap2 primer pair, can reduce enrichment time and improve the sensitivity and specificity of L. monocytogenes detection in mushrooms.
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Affiliation(s)
- Yewon Lee
- Department of Food and Nutrition, Sookmyung Women's University, Seoul, Korea
| | - Yohan Yoon
- Department of Food and Nutrition, Sookmyung Women's University, Seoul, Korea
| | - Yeongeun Seo
- Department of Food and Nutrition, Sookmyung Women's University, Seoul, Korea
| | - Sejeong Kim
- Risk Analysis Research Center, Sookmyung Women's University, Seoul, Korea
| | - Jimyeong Ha
- Risk Analysis Research Center, Sookmyung Women's University, Seoul, Korea
| | - Jeeyeon Lee
- Risk Analysis Research Center, Sookmyung Women's University, Seoul, Korea
| | - Yukyung Choi
- Department of Food and Nutrition, Sookmyung Women's University, Seoul, Korea
| | - Hyemin Oh
- Department of Food and Nutrition, Sookmyung Women's University, Seoul, Korea
| | - Yujin Kim
- Department of Food and Nutrition, Sookmyung Women's University, Seoul, Korea
| | - Joohyun Kang
- Department of Food and Nutrition, Sookmyung Women's University, Seoul, Korea
| | - Eunyoung Park
- Department of Food and Nutrition, Sookmyung Women's University, Seoul, Korea
| | - Won-Il Kim
- Microbial Safety Team, National Institute of Agricultural Sciences, Rural Development Administration, Wanju, Korea
| | - Soomin Lee
- Department of Food and Nutrition, Sookmyung Women's University, Seoul, Korea
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Costa M, Sucari A, Epszteyn S, Oteiza J, Gentiluomo J, Melamed C, Figueroa Y, Mingorance S, Grisaro A, Spioussas S, Almeida MB, Caruso M, Pontoni A, Signorini M, Leotta G. Comparison of six commercial systems for the detection of non-O157 STEC in meat and vegetables. Food Microbiol 2019; 84:103273. [DOI: 10.1016/j.fm.2019.103273] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 07/13/2019] [Accepted: 07/15/2019] [Indexed: 10/26/2022]
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Assessing the equivalence of Vibrio parahaemolyticus MPN and PCR quantification methods in oyster samples: A seven-year study. Food Microbiol 2019; 84:103163. [PMID: 31421786 DOI: 10.1016/j.fm.2019.02.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 02/08/2019] [Indexed: 11/22/2022]
Abstract
Data collected from FDA proficiency tests (PT) during 2012-2018 was used to evaluate the performance of most probable number (MPN) and polymerase chain reaction (PCR) methods used to enumerate Vibrio parahaemolyticus in oyster samples. The primary aim was to establish whether the MPN and PCR methods can be considered equivalent. The following criterion for equivalence was applied: the absolute value of mean bias and between-sample standard deviation must both be less than 0.1 (log10). Final calculations showed mean bias and between-sample standard deviation (SD) were 0.031 and 0.117 (log10) respectively. The between-sample SD criterion was slightly relaxed because with close to 700 results, the data set was large and overall mean bias was low. It was concluded that the two methods can be considered equivalent. The use of PT data for the assessment of method rather than laboratory performance is a secondary topic addressed in this paper. Important requirements for this use of PT data include availability of sufficient results for both methods and use of real food matrices. Ultimately, the results presented here provide an example of how PT data can be used to monitor method performance across many laboratories and samples as well as to assess method equivalence.
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A Novel Method for Sampling and Long-Term Monitoring of Microbes That Uses Stickers of Plain Paper. Appl Environ Microbiol 2019; 85:AEM.00766-19. [PMID: 31126944 DOI: 10.1128/aem.00766-19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Accepted: 04/24/2019] [Indexed: 11/20/2022] Open
Abstract
Detection of pathogens is crucial in food production areas. While it is well established, swabbing as a state-of-the-art sampling method offers several drawbacks with respect to yield, standardization, overall handling, and long-term monitoring. This led us to develop and evaluate a method that is easier to use at a lower cost and that should be at least as sensitive. After evaluating sundry promising materials, we tested text-marking paper stickers for their suitability to take up and release Listeria monocytogenes with their nonsticky paper side over a 14-day time period using quantitative PCR. The recovery rate was similar to that in previous studies using conventional swabs, and we also confirmed the feasibility of pooling besides resilience to cleansing and disinfection. In a proof-of-concept experiment that sampled several locations, such as door handles, the occurrences of L. monocytogenes and Escherichia coli were determined. The results suggest that the presented sticker system might offer a promising cost-effective alternative sampling system with improved handling characteristics.IMPORTANCE As a ubiquitous bacterium, Listeria monocytogenes has a propensity to enter food production areas inadvertently via fomites such as door handles and switches. While the bacterium might not be in direct contact with the food products, knowing the microbial status of the surroundings is essential for risk assessment. Our investigation into a novel quantitative PCR (qPCR)-based sampling system with the highest sensitivity and ability to monitor over long periods of time, yet based on paper, proved to be cost-effective and reasonably convenient to handle.
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Immunodetection of Streptococcus uberis pathogen in raw milk. Enzyme Microb Technol 2019; 130:109360. [PMID: 31421723 DOI: 10.1016/j.enzmictec.2019.109360] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 06/12/2019] [Accepted: 06/14/2019] [Indexed: 11/24/2022]
Abstract
Streptococcus uberis is a major mastitis-causing environmental pathogen, which rapid immunodetection has not been possible due to the absence of specific anti-Str. uberis antibodies. Recently, a specific antibody against the Str. uberis adhesion molecule (SUAM) has been designed. In the present study, the specificity and affinity of this antibody towards SUAM antigenic region SAPVYLGVSTE and Str. uberis cells are characterized, using experimental and in silico bioinformatic methods. The selectivity studies and bioinformatic analyses revealed high specificity of the antibody towards Str. uberis. The Kd value of SAPVYLGVSTE/anti-Str. uberis antibody complex was 27 ± 6 nM, indicating the applicability of this antibody for the detection of Str. uberis. The anti-Str. uberis antibody was used as a specific biorecognition element of a biosensor for the detection of Str. uberis bacteria in phosphate buffer and in milk and these analyses took less than 20 min. The Str. uberis biosensor was also tested in the milk of cows suffering from mastitis and the obtained results were in good agreement with the conventional identification of this pathogen by microbiological plating.
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