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You H, Ma N, Li T, Yu Z, Gan N. Versatile Platinum Nanoparticles-Decorated Phage Nanozyme Integrating Recognition, Bacteriolysis, and Catalysis Capabilities for On-Site Detection of Foodborne Pathogenic Strains Vitality Based on Bioluminescence/Pressure Dual-Mode Bioassay. Anal Chem 2024; 96:8782-8790. [PMID: 38728110 DOI: 10.1021/acs.analchem.4c01192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2024]
Abstract
Sensitive and on-site discrimination of live and dead foodborne pathogenic strains remains a significant challenge due to the lack of appropriate assay and signal probes. In this work, a versatile platinum nanoparticle-decorated phage nanozyme (P2@PtNPs) that integrated recognition, bacteriolysis, and catalysis was designed to establish the bioluminescence/pressure dual-mode bioassay for on-site determination of the vitality of foodborne pathogenic strains. Benefiting from the bacterial strain-level specificity of phage, the target Salmonella typhimurium (S.T) was specially captured to form sandwich complexes with P2@PtNPs on another phage-modified glass microbead (GM@P1). As the other part of the P2@PtNPs nanozyme, the introduced PtNPs could not only catalyze the decomposition of hydrogen peroxide to generate a significant oxygen pressure signal but also produce hydroxyl radicals around the target bacteria to enhance the bacteriolysis of phage and adenosine triphosphate release. It significantly improved the bioluminescence signal. The two signals corresponded to the total and live target bacteria counts, so the dead target could be easily calculated from the difference between the total and live target bacteria counts. Meanwhile, the vitality of S.T was realized according to the ratio of live and total S.T. Under optimal conditions, the application range of this proposed bioassay for bacterial vitality was 102-107 CFU/mL, with a limit of detections for total and live S.T of 30 CFU/mL and 40 CFU/mL, respectively. This work provides an innovative and versatile nanozyme signal probe for the on-site determination of bacterial vitality for food safety.
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Affiliation(s)
- Hang You
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, Institute of Mass Spectrometry, School of Material Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
| | - Nannan Ma
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, Institute of Mass Spectrometry, School of Material Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
| | - Tianhua Li
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, Institute of Mass Spectrometry, School of Material Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
| | - Zhenzhong Yu
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, Institute of Mass Spectrometry, School of Material Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
| | - Ning Gan
- Key Laboratory of Advanced Mass Spectrometry and Molecular Analysis of Zhejiang Province, Institute of Mass Spectrometry, School of Material Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
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ATP Bioluminescence for Rapid and Selective Detection of Bacteria and Yeasts in Wine. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11114953] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Microbial contamination may represent a loss of money for wine producers as several defects can arise due to a microorganism’s growth during storage. The aim of this study was to implement a bioluminescence assay protocol to rapidly and simultaneously detect bacteria and yeasts in wines. Different wines samples were deliberately contaminated with bacteria and yeasts at different concentrations and filtered through two serial filters with decreasing mesh to separate bacteria and yeasts. These were resuscitated over 24 h on selective liquid media and analyzed by bioluminescence assay. ATP measurements discriminated the presence of yeasts and bacteria in artificially contaminated wine samples down to 50 CFU/L of yeasts and 1000 CFU/L of bacteria. The developed protocol allowed to detect, rapidly (24 h) and simultaneously, bacteria and yeasts in different types of wines. This would be of great interest for industries, for which an early detection and discrimination of microbial contaminants would help in the decision-making process.
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Cai Y, Ng JJ, Leck H, Teo JQ, Goh JX, Lee W, Koh TH, Tan TT, Lim TP, Kwa AL. Elimination of Extracellular Adenosine Triphosphate for the Rapid Prediction of Quantitative Plate Counts in 24 h Time-Kill Studies against Carbapenem-Resistant Gram-Negative Bacteria. Microorganisms 2020; 8:microorganisms8101489. [PMID: 32998347 PMCID: PMC7599598 DOI: 10.3390/microorganisms8101489] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 09/24/2020] [Accepted: 09/25/2020] [Indexed: 11/30/2022] Open
Abstract
Traditional in vitro time-kill studies (TKSs) require viable plating, which is tedious and time-consuming. We used ATP bioluminescence, with the removal of extracellular ATP (EC-ATP), as a surrogate for viable plating in TKSs against carbapenem-resistant Gram-negative bacteria (CR-GNB). Twenty-four-hour TKSs were conducted using eight clinical CR-GNB (two Escherichia coli, two Klebsiella spp., two Acinetobacter baumannii, two Pseudomonas aeruginosa) with multiple single and two-antibiotic combinations. ATP bioluminescence and viable counts were determined at each timepoint (0, 2, 4, 8, 24 h), with and without apyrase treatment. Correlation between ATP bioluminescence and viable counts was determined for apyrase-treated and non-apyrase-treated samples. Receiver operator characteristic curves were plotted to determine the optimal luminescence threshold to discriminate between inhibitory/non-inhibitory and bactericidal/non-bactericidal combinations, compared to viable counts. After treatment of bacteria with 2 U/mL apyrase for 15 min at 37 °C, correlation to viable counts was significantly higher compared to untreated samples (p < 0.01). Predictive accuracies of ATP bioluminescence were also significantly higher for apyrase-treated samples in distinguishing inhibitory (p < 0.01) and bactericidal (p = 0.03) combinations against CR-GNB compared to untreated samples, when all species were collectively analyzed. We found that ATP bioluminescence can potentially replace viable plating in TKS. Our assay also has applications in in vitro and in vivo infection models.
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Affiliation(s)
- Yiying Cai
- Department of Pharmacy, Singapore General Hospital, Singapore 169608, Singapore; (Y.C.); (H.L.); (J.Q.T.); (J.-X.G.); (W.L.)
- Department of Pharmacy, National University of Singapore, Singapore 117559, Singapore;
| | - Jonathan J. Ng
- Department of Pharmacy, National University of Singapore, Singapore 117559, Singapore;
| | - Hui Leck
- Department of Pharmacy, Singapore General Hospital, Singapore 169608, Singapore; (Y.C.); (H.L.); (J.Q.T.); (J.-X.G.); (W.L.)
| | - Jocelyn Q. Teo
- Department of Pharmacy, Singapore General Hospital, Singapore 169608, Singapore; (Y.C.); (H.L.); (J.Q.T.); (J.-X.G.); (W.L.)
- Saw Swee Hock School of Public Health, National University of Singapore and National University of Health System, Singapore 117549, Singapore
| | - Jia-Xuan Goh
- Department of Pharmacy, Singapore General Hospital, Singapore 169608, Singapore; (Y.C.); (H.L.); (J.Q.T.); (J.-X.G.); (W.L.)
| | - Winnie Lee
- Department of Pharmacy, Singapore General Hospital, Singapore 169608, Singapore; (Y.C.); (H.L.); (J.Q.T.); (J.-X.G.); (W.L.)
| | - Tse-Hsien Koh
- Department of Microbiology, Singapore General Hospital, Singapore 169856, Singapore;
- SingHealth Duke-NUS Medicine Pathology Clinical Programme, Singapore 169608, Singapore
| | - Thuan-Tong Tan
- Department of Infectious Diseases, Singapore General Hospital, Singapore 169856, Singapore;
- SingHealth Duke-NUS Medicine Academic Clinical Programme, Singapore 169856, Singapore
| | - Tze-Peng Lim
- Department of Pharmacy, Singapore General Hospital, Singapore 169608, Singapore; (Y.C.); (H.L.); (J.Q.T.); (J.-X.G.); (W.L.)
- SingHealth Duke-NUS Medicine Pathology Clinical Programme, Singapore 169608, Singapore
- SingHealth Duke-NUS Medicine Academic Clinical Programme, Singapore 169856, Singapore
- Correspondence: (T.-P.L.); (A.L.K.); Tel.: +65-6576-7813 (T.-P.L.); +65-6326-6959 (A.L.K.)
| | - Andrea L. Kwa
- Department of Pharmacy, Singapore General Hospital, Singapore 169608, Singapore; (Y.C.); (H.L.); (J.Q.T.); (J.-X.G.); (W.L.)
- Department of Pharmacy, National University of Singapore, Singapore 117559, Singapore;
- SingHealth Duke-NUS Medicine Academic Clinical Programme, Singapore 169856, Singapore
- Emerging Infectious Diseases, Duke-NUS Medical School, Singapore 169857, Singapore
- Correspondence: (T.-P.L.); (A.L.K.); Tel.: +65-6576-7813 (T.-P.L.); +65-6326-6959 (A.L.K.)
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Exploratory review on safety of edible raw fish per the hazard factors and their detection methods. Trends Food Sci Technol 2017. [DOI: 10.1016/j.tifs.2016.11.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Determination of microbial load for different beverages and foodstuff by assessment of intracellular ATP. Trends Food Sci Technol 2015. [DOI: 10.1016/j.tifs.2015.02.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Hammons SR, Stasiewicz MJ, Roof S, Oliver HF. Aerobic plate counts and ATP levels correlate with Listeria monocytogenes detection in retail delis. J Food Prot 2015; 78:825-30. [PMID: 25836412 DOI: 10.4315/0362-028x.jfp-14-500] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Listeria monocytogenes is a foodborne pathogen that causes an estimated 1,591 cases of illness and 255 deaths annually in the United States, the majority of which are attributed to ready-to-eat deli meats processed in retail delis. Because retail delis distribute product directly to consumers, rapid methods to validate cleaning and sanitation are needed to improve retail food safety. This study investigated the relationships among ATP levels, standard aerobic plate count (APC), and L. monocytogenes presence in fully operational delis. Fifteen full-service delis were concurrently sampled for ATP, APC, and L. monocytogenes during preoperational hours once monthly for 3 months. Fifteen additional delis were recruited for 6 months of operational sampling (n = 30). A 1-log increase in APC was equivalent to a 3.3-fold increase in the odds of detecting L. monocytogenes (P < 0.001) and a 1.9-log increase in L monocytogenes population (P = 0.03). An ATP level increase of 1 log relative light unit correlated to a 0.22-log increase in APC (P < 0.001). A preoperational ATP level mean increase by 1 log relative light unit increased the odds of detecting L. monocytogenes concurrently fourfold. A 0.5-log increase in mean ATP level during preoperational sampling corresponded to a 2% increase in the predicted L. monocytogenes prevalence during operation (P < 0.01). Additionally, 10 statistically representative sites were identified and recommended for use in sanitation monitoring programs. Our data support the use of ATP as a rapid method to validate effective cleaning and sanitation to reduce L. monocytogenes in retail delis.
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Affiliation(s)
- Susan R Hammons
- Department of Food Science, Purdue University, West Lafayette, Indiana 47907, USA
| | | | - Sherry Roof
- Department of Food Science, Cornell University, Ithaca, New York 14853, USA
| | - Haley F Oliver
- Department of Food Science, Purdue University, West Lafayette, Indiana 47907, USA.
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Shinozaki Y, Harada Y. Rapid detection of bacteria in green tea using a novel pretreatment method in a bioluminescence assay. J Food Prot 2014; 77:941-7. [PMID: 24853516 DOI: 10.4315/0362-028x.jfp-13-418] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Tea is one of the most popular beverages consumed in the world, and green tea has become a popular beverage in Western as well as Asian countries. A novel pretreatment method for a commercial bioluminescence assay to detect bacteria in green tea was developed and evaluated in this study. Pretreatment buffers with pH levels ranging from 6.0 to 9.0 were selected from MES (morpholineethanesulfonic acid), HEPES (N-2-hydroxyethylpiperazine-N'-2-ethanesulfonic acid), or Tricine buffers. To evaluate the effect of pretreatment and the performance of the assay, serially diluted cultures of Enterobacter cloacae, Escherichia coli, Bacillus subtilis, and Staphylococcus aureus were tested. The improved methods, which consisted of a pretreatment of the sample in alkaline buffer, significantly decreased the background bioluminescence intensity of green tea samples when compared with the conventional method. Pretreatment with alkaline buffers with pH levels ranging from 8.0 to 9.0 increased the bioluminescence intensities of cultures of E. cloacae and S. aureus. Strong log-linear relationships between the bioluminescence intensities and plate counts emerged for the tested strains. Furthermore, the microbial detection limit was 15 CFU in 500 ml of bottled green tea after an 8-h incubation at 35°C and an assay time of 1 h. The results showed that contaminated samples could be detected within 1 h of operation using our improved bioluminescence assay. This method could be used to test for contamination during the manufacturing process as well as for statistical sampling for quality control.
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Affiliation(s)
- Yohei Shinozaki
- Research and Development Division, Kikkoman Corporation, 399 Noda, Noda, Chiba 278-0037, Japan.
| | - Yasuhiro Harada
- Research and Development Division, Kikkoman Corporation, 399 Noda, Noda, Chiba 278-0037, Japan
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Kim S, Kim M, Ryu S. Development of an engineered bioluminescent reporter phage for the sensitive detection of viable Salmonella typhimurium. Anal Chem 2014; 86:5858-64. [PMID: 24806327 DOI: 10.1021/ac500645c] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Because foodborne illnesses continuously threaten public health, rapid and sensitive detection of pathogens in food has become an important issue. As an alternative to time-consuming and laborious conventional detection methods, a technique using recombinant reporter phages has been developed. Here, we developed an advanced bioluminescent reporter phage SPC32H-CDABE by inserting a bacterial luxCDABE operon into the Salmonella temperate phage SPC32H genome. Whole SPC32H genome sequencing enabled the selection of nonessential genes, which can be replaced with approximately 6-kb luxCDABE operon, which provides both luciferase (LuxAB) and its substrate, fatty aldehyde, as generated by fatty acid reductase (LuxCDE). Thus, the SPC32H-CDABE detection assay is simpler and more efficient compared to the luxAB-based assay because the substrate addition step is excluded. At least 20 CFU/mL of pure S. Typhimurium culture was detectable using SPC32H-CDABE within 2 h, and the signals increased proportionally to the number of cells contaminated in lettuce, sliced pork, and milk. These results thereby demonstrate that this phage successfully detects live Salmonella without appreciable interference from food components. Furthermore, the presented data suggest that SPC32H-CDABE represents a promising easy-to-use diagnostic tool for the detection of Salmonella contamination in food.
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Affiliation(s)
- Seongmi Kim
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Research Institute for Agriculture and Life Sciences, and Center for Food and Bioconvergence, Seoul National University , Seoul 151-921, South Korea
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Yue W, Bai C. Improved Design of Automatic Luminometer for Total Bacteria Number Detection Based on ATP Bioluminescence. J Food Saf 2013. [DOI: 10.1111/jfs.12016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Weiwei Yue
- College of Physics and Electronics; Shandong Normal University; Jinan China
| | - Chengjie Bai
- College of Physics and Electronics; Shandong Normal University; Jinan China
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