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Williams MR, Telli AE, Telli N, Islam DT, Hashsham SA. Direct or DNA Extraction-Free Amplification and Quantification of Foodborne Pathogens. Methods Mol Biol 2025; 2852:3-17. [PMID: 39235733 DOI: 10.1007/978-1-0716-4100-2_1] [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: 09/06/2024]
Abstract
The use of direct nucleic acid amplification of pathogens from food matrices has the potential to reduce time to results over DNA extraction-based approaches as well as traditional culture-based approaches. Here we describe protocols for assay design and experiments for direct amplification of foodborne pathogens in food sample matrices using loop-mediated isothermal amplification (LAMP) and polymerase chain reaction (PCR). The examples provided include the detection of Escherichia coli in milk samples and Salmonella in pork meat samples. This protocol includes relevant reagents and methods including obtaining target sequences, assay design, sample processing, and amplification. These methods, though used for specific example matrices, could be applied to many other foodborne pathogens and sample types.
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Affiliation(s)
- Maggie R Williams
- School of Engineering & Technology, Institute for Great Lakes Research, Central Michigan University, Mt Pleasant, MI, USA
| | - Arife Ezgi Telli
- Department of Food Hygiene and Technology, Faculty of Veterinary Medicine, Selcuk University, Konya, Turkey
| | - Nihat Telli
- Department of Food Technology, Vocational School of Technical Sciences, Konya Technical University, Konya, Turkey
| | - Dar Tafazul Islam
- Department of Civil and Environmental Engineering, Michigan State University, East Lansing, MI, USA
| | - Syed A Hashsham
- Department of Civil and Environmental Engineering, Michigan State University, East Lansing, MI, USA.
- Center for Microbial Ecology, Michigan State University, East Lansing, MI, USA.
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2
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Wen Y, Tan Y, Zhao L, Lv X, Lin L, Liang D, Wang L. Rapid on-site detection of viable Escherichia coli O157: H7 in lettuce using immunomagnetic separation combined with PMAxx-LAMP and nucleic acid lateral flow strip. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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3
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Lin H, Jiang H, Adade SYSS, Kang W, Xue Z, Zareef M, Chen Q. Overview of advanced technologies for volatile organic compounds measurement in food quality and safety. Crit Rev Food Sci Nutr 2022; 63:8226-8248. [PMID: 35357234 DOI: 10.1080/10408398.2022.2056573] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Food quality and nutrition have received much attention in recent decades, thanks to changes in consumer behavior and gradual increases in food consumption. The demand for high-quality food necessitates stringent quality assurance and process control measures. As a result, appropriate analytical tools are required to assess the quality of food and food products. VOCs analysis techniques may meet these needs because they are nondestructive, convenient to use, require little or no sample preparation, and are environmentally friendly. In this article, the main VOCs released from various foods during transportation, storage, and processing were reviewed. The principles of the most common VOCs analysis techniques, such as electronic nose, colorimetric sensor array, migration spectrum, infrared and laser spectroscopy, were discussed, as well as the most recent research in the field of food quality and safety evaluation. In particular, we described data processing algorithms and data analysis captured by these techniques in detail. Finally, the challenges and opportunities of these VOCs analysis techniques in food quality analysis were discussed, as well as future development trends and prospects of this field.
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Affiliation(s)
- Hao Lin
- School of Food and Biological Engineering, Jiangsu University, Jiangsu, P. R. China
| | - Hao Jiang
- School of Food and Biological Engineering, Jiangsu University, Jiangsu, P. R. China
| | | | - Wencui Kang
- School of Food and Biological Engineering, Jiangsu University, Jiangsu, P. R. China
| | - Zhaoli Xue
- School of Chemistry and Chemical Engineering, Jiangsu University, Jiangsu, P. R. China
| | - Muhammad Zareef
- School of Food and Biological Engineering, Jiangsu University, Jiangsu, P. R. China
| | - Quansheng Chen
- School of Food and Biological Engineering, Jiangsu University, Jiangsu, P. R. China
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4
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Li J, Zhou D, Xie G, Deng M, Feng X, Xu H. PMAxx Combined with Recombinase Aided Amplification Technique for Specific and Rapid Detection of Salmonella in Milk. FOOD ANAL METHOD 2022. [DOI: 10.1007/s12161-022-02249-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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5
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Shi X, Yu L, Lin C, Li K, Chen J, Qin H. Biotin exposure-based immunomagnetic separation coupled with sodium dodecyl sulfate, propidium monoazide, and multiplex real-time PCR for rapid detection of viable Salmonella Typhimurium, Staphylococcus aureus, and Listeria monocytogenes in milk. J Dairy Sci 2021; 104:6588-6597. [PMID: 33715855 DOI: 10.3168/jds.2020-19887] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 01/28/2021] [Indexed: 11/19/2022]
Abstract
In this study, we established a rapid and sensitive method for the detection of viable Salmonella Typhimurium, Staphylococcus aureus, and Listeria monocytogenes in milk using biotin-exposure-based immunomagnetic separation (IMS) combined with sodium dodecyl sulfate (SDS), propidium monoazide (PMA), and multiplex real-time PCR (mRT-PCR). We used IMS to lessen the assay time for isolation of target bacteria. We then optimized the coupling conditions and immunomagnetic capture process. The immunoreaction and incubation times for 5 μg of mAb coupled with 500 μg of streptavidin-functionalized magnetic beads using a streptavidin-biotin system were 90 and 30 min, respectively. Treatment with SDS-PMA before mRT-PCR amplification eliminated false-positive outcomes from dead bacteria and identified viable target bacteria with good sensitivity and specificity. The limit of detection of IMS combined with the SDS-PMA-mRT-PCR assay for the detection of viable Salmonella Typhimurium, Staph. aureus, and L. monocytogenes in spiked milk matrix samples was 10 cfu/mL and remained significant even in the appearance of 106 cfu/mL of nontarget bacteria. The entire detection process was able to identify viable bacteria within 9 h. The combination of biotin-exposure-mediated IMS and SDS-PMA-mRT-PCR has potential value for the rapid and sensitive detection of foodborne pathogens.
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Affiliation(s)
- Xiuquan Shi
- Xiangya School of Public Health, Central South University, Changsha 410078, P. R. China
| | - Liang Yu
- Research and Development Office, Hunan First Normal University, Changsha 410205, P. R. China
| | - Cui Lin
- Xiangya School of Public Health, Central South University, Changsha 410078, P. R. China
| | - Ke Li
- College of Food Science and Technology, Hunan Agricultural University, Changsha 410128, P. R. China
| | - Jihua Chen
- Xiangya School of Public Health, Central South University, Changsha 410078, P. R. China
| | - Hong Qin
- Xiangya School of Public Health, Central South University, Changsha 410078, P. R. China.
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6
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Chen H, Li YK, Zhang TT, Bi Y, Shu M, Zhong C, Tang KJ, Wu GP. A Novel Real-Time Loop-Mediated Isothermal Amplification Combined with Immunomagnetic Beads Separation and Ethidium Bromide Monoazide Treatment for Rapid and Ultrasensitive Detection of Viable Escherichia coli O157:H7 in Milk. FOOD ANAL METHOD 2021. [DOI: 10.1007/s12161-020-01932-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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7
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Liang T, Wu X, Chen B, Liu J, Aguilar ZP, Xu H. The PCR-HCR dual signal amplification strategy for ultrasensitive detection of Escherichia coli O157:H7 in milk. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2020.109642] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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8
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Zhao L, Lv X, Cao X, Zhang J, Gu X, Zeng H, Wang L. Improved quantitative detection of VBNC Vibrio parahaemolyticus using immunomagnetic separation and PMAxx-qPCR. Food Control 2020. [DOI: 10.1016/j.foodcont.2019.106962] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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9
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Baymiev AK, Baymiev AK, Kuluev BR, Shvets KY, Yamidanov RS, Matniyazov RT, Chemeris DA, Zubov VV, Alekseev YI, Mavzyutov AR, Ivanenkov YA, Chemeris AV. Modern Approaches to Differentiation of Live and Dead Bacteria Using Selective Amplification of Nucleic Acids. Microbiology (Reading) 2020. [DOI: 10.1134/s0026261720010038] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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10
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Kim JH, Jung S, Oh SW. Combination of bacteria concentration and DNA concentration for rapid detection of E. coli O157:H7, L. monocytogenes, and S. Typhimurium without microbial enrichment. Lebensm Wiss Technol 2020. [DOI: 10.1016/j.lwt.2019.108609] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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11
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Quantitative detection of viable Escherichia coli O157:H7 using a photoreactive DNA-binding dye propidium monoazide in irrigation water. Biochem Eng J 2019. [DOI: 10.1016/j.bej.2019.107354] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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12
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Dong L, Liu H, Meng L, Xing M, Lan T, Gu M, Zheng N, Wang C, Chen H, Wang J. Short communication: Quantitative PCR coupled with sodium dodecyl sulfate and propidium monoazide for detection of culturable Escherichia coli in milk. J Dairy Sci 2019; 102:6914-6919. [PMID: 31202653 DOI: 10.3168/jds.2018-15393] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 04/22/2019] [Indexed: 11/19/2022]
Abstract
Escherichia coli has been frequently reported as a major foodborne bacterium contaminating raw milk or pasteurized milk. Therefore, the aim of this study was to explore a quantitative real-time PCR (qPCR) technique combined with sodium dodecyl sulfate (SDS) and propidium monoazide (PMA) to detect culturable E. coli in milk. An internal amplification control was also added into this reaction system as an indicator of false-negative results. The inclusivity and exclusivity of the primers were tested using DNA from 7 E. coli and 14 other bacterial strains. The concentrations of SDS and PMA were determined according to plate counts and quantitative cycle values of qPCR, respectively. A standard curve was established using series diluted E. coli DNA. The reliability and specificity of this method were further determined by the detection of E. coli in spiked milk. The results showed that the optimal concentrations of SDS and PMA were 100 µg/mL and 40 μM, respectively. A standard curve with a good linear relationship (coefficient of determination = 0.997; amplification efficiency = 100.5%) was obtained. Compared with conventional PCR and PMA-qPCR, the SDS-PMA-qPCR assay was more specific and sensitive in culturable E. coli detection. Therefore, we evaluated and improved the SDS-PMA-qPCR method for detecting culturable E. coli in milk.
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Affiliation(s)
- Lei Dong
- Laboratory of Quality and Safety Risk Assessment for Dairy Products of Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China; Milk and Dairy Product Inspection Center of Ministry of Agriculture and Rural Affairs, Beijing 100193, P. R. China; College of Food Science and Engineer, Qingdao Agricultural University, Qingdao 266109, P. R. China
| | - Huimin Liu
- Laboratory of Quality and Safety Risk Assessment for Dairy Products of Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China; Milk and Dairy Product Inspection Center of Ministry of Agriculture and Rural Affairs, Beijing 100193, P. R. China; Institute of Quality Standard and Testing Technology, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, P. R. China
| | - Lu Meng
- Laboratory of Quality and Safety Risk Assessment for Dairy Products of Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China; Milk and Dairy Product Inspection Center of Ministry of Agriculture and Rural Affairs, Beijing 100193, P. R. China
| | - Mengru Xing
- Laboratory of Quality and Safety Risk Assessment for Dairy Products of Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China; Milk and Dairy Product Inspection Center of Ministry of Agriculture and Rural Affairs, Beijing 100193, P. R. China; College of Food Science and Engineer, Qingdao Agricultural University, Qingdao 266109, P. R. China
| | - Tu Lan
- Laboratory of Quality and Safety Risk Assessment for Dairy Products of Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China; Milk and Dairy Product Inspection Center of Ministry of Agriculture and Rural Affairs, Beijing 100193, P. R. China; Institute of Quality Standard and Testing Technology, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, P. R. China
| | - Mei Gu
- Laboratory of Quality and Safety Risk Assessment for Dairy Products of Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China; Milk and Dairy Product Inspection Center of Ministry of Agriculture and Rural Affairs, Beijing 100193, P. R. China
| | - Nan Zheng
- Laboratory of Quality and Safety Risk Assessment for Dairy Products of Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China; Milk and Dairy Product Inspection Center of Ministry of Agriculture and Rural Affairs, Beijing 100193, P. R. China
| | - Cheng Wang
- Institute of Quality Standard and Testing Technology, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, P. R. China
| | - He Chen
- Institute of Quality Standard and Testing Technology, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, P. R. China
| | - Jiaqi Wang
- Laboratory of Quality and Safety Risk Assessment for Dairy Products of Ministry of Agriculture and Rural Affairs, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, P. R. China; Milk and Dairy Product Inspection Center of Ministry of Agriculture and Rural Affairs, Beijing 100193, P. R. China.
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13
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Liang T, Zhou P, Zhou B, Xu Q, Zhou Z, Wu X, Aguilar ZP, Xu H. Simultaneous quantitative detection of viable Escherichia coli O157:H7, Cronobacter spp., and Salmonella spp. using sodium deoxycholate-propidium monoazide with multiplex real-time PCR. J Dairy Sci 2019; 102:2954-2965. [DOI: 10.3168/jds.2018-15736] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2018] [Accepted: 12/20/2018] [Indexed: 01/18/2023]
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14
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Zhao Y, Chen H, Liu H, Cai J, Meng L, Dong L, Zheng N, Wang J, Wang C. Quantitative Polymerase Chain Reaction Coupled With Sodium Dodecyl Sulfate and Propidium Monoazide for Detection of Viable Streptococcus agalactiae in Milk. Front Microbiol 2019; 10:661. [PMID: 30984156 PMCID: PMC6450196 DOI: 10.3389/fmicb.2019.00661] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 03/15/2019] [Indexed: 12/14/2022] Open
Abstract
Streptococcus agalactiae is an important pathogen causing bovine mastitis. The aim of this study was to develop a simple and specific method for direct detection of S. agalactiae from milk products. Propidium monoazide (PMA) and sodium dodecyl sulfate (SDS) were utilized to eliminate the interference of dead and injured cells in qPCR. Lysozyme (LYZ) was adopted to increase the extraction efficiency of target bacteria DNA in milk matrix. The specific primers were designed based on cfb gene of S. agalactiae for qPCR. The inclusivity and exclusivity of the assay were evaluated using 30 strains. The method was further determined by the detection of S. agalactiae in spiked milk. Results showed significant differences between the SDS–PMA–qPCR, PMA–qPCR and qPCR when a final concentration of 10 mg/ml (R2 = 0.9996, E = 95%) of LYZ was added in DNA extraction. Viable S. agalactiae was effectively detected when SDS and PMA concentrations were 20 μg/ml and 10 μM, respectively, and it was specific and more sensitive than qPCR and PMA–qPCR. Moreover, the SDS–PMA–qPCR assay coupled with LYZ was used to detect viable S. agalactiae in spiked milk, with a limit of detection of 3 × 103 cfu/ml. Therefore, the SDS–PMA–qPCR assay had excellent sensitivity and specificity for detection of viable S. agalactiae in milk.
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Affiliation(s)
- Yankun Zhao
- Institute of Quality Standard and Testing Technology for Agro-Products, Xinjiang Academy of Agricultural Sciences, Urumqi, China.,Ministry of Agriculture and Rural Affairs-Laboratory of Quality and Safety Risk Assessment for Agro-Products, Urumqi, China.,Key Laboratory of Agro-Products Quality and Safety of Xinjiang, Urumqi, China
| | - He Chen
- Institute of Quality Standard and Testing Technology for Agro-Products, Xinjiang Academy of Agricultural Sciences, Urumqi, China.,Ministry of Agriculture and Rural Affairs-Laboratory of Quality and Safety Risk Assessment for Agro-Products, Urumqi, China.,Key Laboratory of Agro-Products Quality and Safety of Xinjiang, Urumqi, China
| | - Huimin Liu
- Institute of Quality Standard and Testing Technology for Agro-Products, Xinjiang Academy of Agricultural Sciences, Urumqi, China.,Ministry of Agriculture and Rural Affairs-Laboratory of Quality and Safety Risk Assessment for Agro-Products, Urumqi, China.,Key Laboratory of Agro-Products Quality and Safety of Xinjiang, Urumqi, China.,Ministry of Agriculture Laboratory of Quality and Safety Risk Assessment for Dairy Products (Beijing), Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jianxing Cai
- Institute of Quality Standard and Testing Technology for Agro-Products, Xinjiang Academy of Agricultural Sciences, Urumqi, China.,Ministry of Agriculture and Rural Affairs-Laboratory of Quality and Safety Risk Assessment for Agro-Products, Urumqi, China.,Key Laboratory of Agro-Products Quality and Safety of Xinjiang, Urumqi, China
| | - Lu Meng
- Ministry of Agriculture Laboratory of Quality and Safety Risk Assessment for Dairy Products (Beijing), Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Lei Dong
- Ministry of Agriculture Laboratory of Quality and Safety Risk Assessment for Dairy Products (Beijing), Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Nan Zheng
- Ministry of Agriculture Laboratory of Quality and Safety Risk Assessment for Dairy Products (Beijing), Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Jiaqi Wang
- Ministry of Agriculture Laboratory of Quality and Safety Risk Assessment for Dairy Products (Beijing), Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Cheng Wang
- Ministry of Agriculture and Rural Affairs-Laboratory of Quality and Safety Risk Assessment for Agro-Products, Urumqi, China.,Key Laboratory of Agro-Products Quality and Safety of Xinjiang, Urumqi, China
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15
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Hu J, Huang R, Sun Y, Wei X, Wang Y, Jiang C, Geng Y, Sun X, Jing J, Gao H, Wang Z, Dong C. Sensitive and rapid visual detection of Salmonella Typhimurium in milk based on recombinase polymerase amplification with lateral flow dipsticks. J Microbiol Methods 2019; 158:25-32. [DOI: 10.1016/j.mimet.2019.01.018] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 01/25/2019] [Accepted: 01/28/2019] [Indexed: 12/20/2022]
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16
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Canh VD, Kasuga I, Furumai H, Katayama H. Viability RT-qPCR Combined with Sodium Deoxycholate Pre-treatment for Selective Quantification of Infectious Viruses in Drinking Water Samples. FOOD AND ENVIRONMENTAL VIROLOGY 2019; 11:40-51. [PMID: 30680674 DOI: 10.1007/s12560-019-09368-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 01/18/2019] [Indexed: 05/22/2023]
Abstract
The presence of pathogenic viruses in drinking water is a major public health concern. Although viability RT-qPCR methods were developed to quantify infectious viruses, they may not always reflect viral infectivity, therefore leading to false-positive results. In this study, sodium deoxycholate (SD) pre-treatment was used to improve the efficiency of viability RT-qPCR methods with respect to exclusive quantification of infectious viruses. The ability of SD pre-treatment to enhance the penetration of three viability markers, namely, ethidium monoazide (EMA, 100 µM), propidium monoazide (PMA, 100 µM), and cis-dichlorodiammineplatinum (CDDP, 1000 µM), into heat-treated (90 °C for 1 min) Aichi virus at various concentrations (0.01-0.5%) was evaluated. The optimal SD concentration was found to be 0.1% for all markers. EMA/PMA/CDDP-RT-qPCR with 0.1% SD pre-treatment was significantly more effective than without SD pre-treatment in determining AiV inactivation after heat (50, 60, 70, 80, or 90 °C for 1 min) or chlorine treatment (1 mgCl2/L for 1, 2, 5, or 10 min). Among the viability RT-qPCR methods tested, CDDP-RT-qPCR with SD pre-treatment (SD-CDDP-RT-qPCR) was the most effective in reflecting viral infectivity. Performance testing of SD-CDDP-RT-qPCR in concentrated drinking water samples did not reveal any significant effects of SD-CDDP treatment. Thus, SD-CDDP-RT-qPCR could be a useful tool for monitoring infectious virus presence in drinking water.
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Affiliation(s)
- Vu Duc Canh
- Department of Urban Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.
| | - Ikuro Kasuga
- Department of Urban Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Hiroaki Furumai
- Research Center for Water Environment Technology, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Hiroyuki Katayama
- Department of Urban Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan.
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17
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Wang H, Huang J, Sun L, Xu F, Zhang W, Zhan J. An efficient process for co-production of γ-aminobutyric acid and probiotic Bacillus subtilis cells. Food Sci Biotechnol 2019; 28:155-163. [PMID: 30815306 PMCID: PMC6365325 DOI: 10.1007/s10068-018-0461-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 08/09/2018] [Accepted: 08/29/2018] [Indexed: 10/28/2022] Open
Abstract
This study was to establish an integrated process for the co-production of γ-aminobutyric acid (GABA) and live probiotics. Six probiotic bacteria were screened and Bacillus subtilis ATCC 6051 showed the highest GABA-producing capacity. The optimal temperature and initial pH value for GABA production in B. subtilis were found to be 30 °C and 8.0, respectively. A variety of carbon and nitrogen sources were tested, and potato starch and peptone were the preferred carbon and nitrogen sources for GABA production, respectively. The concentrations of carbon source, nitrogen source and substrate (sodium l-glutamate) were then optimized using the response surface methodology. The GABA titer and concentration of viable cells of B. subtilis reached 19.74 g/L and 6.0 × 108 cfu/mL at 120 h. The GABA titer represents the highest production of GABA in B. subtilis. This work thus demonstrates a highly efficient co-production process for GABA and probiotic B. subtilis cells.
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Affiliation(s)
- Hongbo Wang
- Department of Biological Engineering, Utah State University, 4105 Old Main Hill, Logan, UT 84322-4105 USA
- Hubei Province Engineering Research Center for Legume Plants, School of Life Sciences, Jianghan University, 8 Xuefu Road, Wuhan, 430056 Hubei China
| | - Jinge Huang
- Department of Biological Engineering, Utah State University, 4105 Old Main Hill, Logan, UT 84322-4105 USA
| | - Lei Sun
- Department of Biological Engineering, Utah State University, 4105 Old Main Hill, Logan, UT 84322-4105 USA
| | - Fuchao Xu
- Department of Biological Engineering, Utah State University, 4105 Old Main Hill, Logan, UT 84322-4105 USA
| | - Wei Zhang
- Hangzhou Viablife Biotech Co., Ltd, 1 Jingyi Road, Yuhang District, Hangzhou, 31113 Zhejiang China
| | - Jixun Zhan
- Department of Biological Engineering, Utah State University, 4105 Old Main Hill, Logan, UT 84322-4105 USA
- TCM and Ethnomedicine Innovation and Development Laboratory, School of Pharmacy, Hunan University of Chinese Medicine, Changsha, 410208 Hunan China
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18
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Williams MR, Hashsham SA. Direct or DNA Extraction-Free Amplification and Quantification of Foodborne Pathogens. Methods Mol Biol 2019; 1918:21-33. [PMID: 30580396 DOI: 10.1007/978-1-4939-9000-9_2] [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] [Indexed: 12/14/2022]
Abstract
The use of direct nucleic acid amplification of pathogens from food matrices has the potential to reduce time to results over DNA extraction-based approaches as well as traditional culture-based approaches. Here we describe protocols for assay design and experiments for direct amplification of foodborne pathogens in food sample matrices using loop-mediated isothermal amplification (LAMP) and polymerase chain reaction (PCR). The examples provided include the detection Escherichia coli in milk samples and Salmonella in pork meat samples. This protocol includes relevant reagents and methods including obtaining target sequences, assay design, sample processing, and amplification. These methods, though used for specific example matrices, could be applied to many other foodborne pathogens and sample types.
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Affiliation(s)
- Maggie R Williams
- Department of Civil and Environmental Engineering, Michigan State University, East Lansing, MI, USA
| | - Syed A Hashsham
- Department of Civil and Environmental Engineering, Michigan State University, East Lansing, MI, USA. .,Center for Microbial Ecology, Michigan State University, East Lansing, MI, USA.
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19
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Detection and Evaluation of Viable but Non-culturable Escherichia coli O157:H7 Induced by Low Temperature with a BCAC-EMA-Rti-LAMP Assay in Chicken Without Enrichment. FOOD ANAL METHOD 2018. [DOI: 10.1007/s12161-018-1377-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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20
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Yang X, Feng L, Qin X. Preparation of the Cf-GQDs-Escherichia coli O157: H7 Bioprobe and Its Application in Optical Imaging and Sensing of Escherichia coli O157: H7. FOOD ANAL METHOD 2018. [DOI: 10.1007/s12161-018-1207-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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21
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Microbial diversity of consumption milk during processing and storage. Int J Food Microbiol 2018; 266:21-30. [DOI: 10.1016/j.ijfoodmicro.2017.11.004] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 11/02/2017] [Accepted: 11/07/2017] [Indexed: 01/04/2023]
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22
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Scariot MC, Venturelli GL, Prudêncio ES, Arisi ACM. Quantification of Lactobacillus paracasei viable cells in probiotic yoghurt by propidium monoazide combined with quantitative PCR. Int J Food Microbiol 2018; 264:1-7. [DOI: 10.1016/j.ijfoodmicro.2017.10.021] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 10/16/2017] [Accepted: 10/17/2017] [Indexed: 12/21/2022]
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23
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Li Y, Yang L, Fu J, Yan M, Chen D, Zhang L. The novel loop-mediated isothermal amplification based confirmation methodology on the bacteria in Viable but Non-Culturable (VBNC) state. Microb Pathog 2017; 111:280-284. [DOI: 10.1016/j.micpath.2017.09.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Revised: 09/03/2017] [Accepted: 09/05/2017] [Indexed: 01/28/2023]
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24
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You Y, Lim S, Hahn J, Choi YJ, Gunasekaran S. Bifunctional linker-based immunosensing for rapid and visible detection of bacteria in real matrices. Biosens Bioelectron 2017; 100:389-395. [PMID: 28954255 DOI: 10.1016/j.bios.2017.09.033] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 08/27/2017] [Accepted: 09/18/2017] [Indexed: 10/18/2022]
Abstract
Detection of pathogens present in food and water is essential to help ensure food safety. Among the popular methods for pathogen detection are those based on culture and colony-counting and polymerase chain reaction (PCR). However, the time-consuming nature and/or the need for sophisticated instrumentation of those methods limit their on-site applications. We have developed a rapid and highly sensitive immunosensing method for visible detection of bacteria in real matrices based on the aggregation of AuNPs without requiring any readout device. We use biotinylated anti-bacteria antibodies as bifunctional linkers (BLs) to mediate the aggregation of streptavidin-functionalized gold nanoparticles (st-AuNPs) to produce visually recognizable color change, due to surface plasmon resonance (SPR), which occurs in about 30min of total assay time when the sample is mildly agitated or within three hours in quiescent conditions. The aggregation of st-AuNPs, which produces the indication signal, is achieved very differently than in visual detection methods reported previously and hence affords ultrahigh sensitivity. While BLs can both bind to the target and crosslink st-AuNPs, their latter function is essentially disabled when they bind to the target bacteria. By varying the amount of st-AuNPs used, we can tailor the assay effectiveness improving limit of detection (LOD) down to 10CFUmL-1 of E. coli and Salmonella. Test results obtained with tap water, lake water and milk samples show that assay performance is unaffected by matrix effects. Further, in a mixture of live and autoclaved E. coli cells our assay could detect only live cells. Therefore, our BL-based immunosensor is suitable for highly sensitive, rapid, and on-site detection of bacteria in real matrices.
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Affiliation(s)
- Youngsang You
- Department of Biological Systems Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Seokwon Lim
- Department of Food Science & Technology, Hoseo University, 79-20 Hoseoro, Asan, Chungnam 336-795, South Korea; Center for Natural Sciences, Hoseo University, 79-20 Hoseoro, Asan, Chungnam 336-795, South Korea
| | - Jungwoo Hahn
- Department of Agricultural Biotechnology, Seoul National University, 1 Gwanakro, Gwanakgu, Seoul 151-921, South Korea
| | - Young Jin Choi
- Department of Agricultural Biotechnology, Seoul National University, 1 Gwanakro, Gwanakgu, Seoul 151-921, South Korea; Center for Food and Bioconvergence, Seoul National University, 1 Gwanakro, Gwanakgu, Seoul 151-921, South Korea; Research Institute of Agriculture and Life Sciences, Seoul National University, 1 Gwanakro, Gwanakgu, Seoul 151-921, South Korea
| | - Sundaram Gunasekaran
- Department of Biological Systems Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA.
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25
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Zhou B, Liang T, Zhan Z, Liu R, Li F, Xu H. Rapid and simultaneous quantification of viable Escherichia coli O157:H7 and Salmonella spp. in milk through multiplex real-time PCR. J Dairy Sci 2017; 100:8804-8813. [PMID: 28865862 DOI: 10.3168/jds.2017-13362] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 07/17/2017] [Indexed: 11/19/2022]
Abstract
Escherichia coli O157:H7 and Salmonella spp. in milk are 2 common pathogens that cause foodborne diseases. An accurate, rapid, specific method has been developed for the simultaneous detection of viable E. coli O157:H7 and Salmonella spp. in milk. Two specific genes, namely, fliC from E. coli O157:H7 and invA from Salmonella spp., were selected to design primers and probes. A combined treatment containing sodium deoxycholate (SDO) and propidium monoazide (PMA) was applied to detect viable E. coli O157:H7 and Salmonella spp. only. Traditional culture methods and SDO-PMA-multiplex real-time (mRT) PCR assay were applied to determine the number of viable E. coli O157:H7 and Salmonella spp. in cell suspensions with different proportions of dead cells. These methods revealed consistent findings regarding the detected viable cells. The detection limit of the SDO-PMA-mRT-PCR assay reached 102 cfu/mL for Salmonella spp. and 102 cfu/mL for E. coli O157:H7 in milk. The detection limit of SDO-PMA-mRT-PCR for E. coli O157:H7 and Salmonella spp. in milk was significantly similar even in the presence of 106 cfu/mL of 2 nontarget bacteria. The proposed SDO-PMA-mRT-PCR assay is a potential approach for the accurate and sensitive detection of viable E. coli O157:H7 and Salmonella spp. in milk.
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Affiliation(s)
- Baoqing Zhou
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330047, PR China
| | - Taobo Liang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330047, PR China
| | - Zhongxu Zhan
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330047, PR China
| | - Rui Liu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330047, PR China
| | - Fan Li
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330047, PR China
| | - Hengyi Xu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang, 330047, PR China.
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26
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27
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Huang Z, Cui X, Xie QY, Liu DF, Lai WH. Short communication: A novel method using immunomagnetic separation with a fluorescent nanobeads lateral flow assay for the rapid detection of low-concentration Escherichia coli O157:H7 in raw milk. J Dairy Sci 2016; 99:9581-9585. [DOI: 10.3168/jds.2016-11780] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 08/12/2016] [Indexed: 11/19/2022]
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28
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Zhou B, Chen B, Wu X, Li F, Yu P, Aguilar ZP, Wei H, Xu H. A new application of a sodium deoxycholate-propidium monoazide-quantitative PCR assay for rapid and sensitive detection of viable Cronobacter sakazakii in powdered infant formula. J Dairy Sci 2016; 99:9550-9559. [DOI: 10.3168/jds.2016-11538] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 08/26/2016] [Indexed: 01/26/2023]
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29
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Yang L, Kuang H, Liu Y, Xu H, Aguilar ZP, Xiong Y, Wei H. Mechanism of enhanced antibacterial activity of ultra-fine ZnO in phosphate buffer solution with various organic acids. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 218:863-869. [PMID: 27524254 DOI: 10.1016/j.envpol.2016.08.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Revised: 07/31/2016] [Accepted: 08/04/2016] [Indexed: 06/06/2023]
Abstract
Ultra-fine-ZnO showed low toxicity in complex water matrix containing multiple components such as PBS buffer and the toxic mechanism of ultra-fine-ZnO has not been clearly elucidated. In present study, enhanced antibacterial activity of 200 nm diameter ultra-fine-ZnO in PBS buffer against Bacillus cereus and Escherichia coli were observed in the presence of several organic acids in comparison with ultra-fine-ZnO in PBS buffer alone. These findings indicated that the toxic effects of the ultra-fine-ZnO was dependent on the concentration of released Zn2+ which was affected by organic acids. The production of reactive oxygen species (ROS) did not responsible to the toxic mechanism of ultra-fine-ZnO which was tested using the antioxidant N-Acetylcysteine (NAC). Indeed, ultra-fine-ZnO induced bacteria cell membrane leakages and cell morphology damages that eventually led to cell death, which were confirmed using propidium monoazide (PMA) in combination with PCR and scanning electron microscopy (SEM). All data gathered herein suggested that released Zn2+ played a major role in the microbial toxicity of ultra-fine-ZnO.
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Affiliation(s)
- Lin Yang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China; Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang 330047, China
| | - Huijuan Kuang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China
| | - Yingxia Liu
- Center of Analysis and Testing of Nanchang University, Nanchang 330047, China
| | - Hengyi Xu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China.
| | | | - Yonghua Xiong
- Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang 330047, China
| | - Hua Wei
- Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang 330047, China.
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30
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Lim MC, Lee GH, Huynh DTN, Hong CE, Park SY, Jung JY, Park CS, Ko S, Kim YR. Biological preparation of highly effective immunomagnetic beads for the separation, concentration, and detection of pathogenic bacteria in milk. Colloids Surf B Biointerfaces 2016; 145:854-861. [DOI: 10.1016/j.colsurfb.2016.05.077] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 05/25/2016] [Accepted: 05/27/2016] [Indexed: 11/30/2022]
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31
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Salihah NT, Hossain MM, Lubis H, Ahmed MU. Trends and advances in food analysis by real-time polymerase chain reaction. Journal of Food Science and Technology 2016; 53:2196-209. [PMID: 27407185 PMCID: PMC4921084 DOI: 10.1007/s13197-016-2205-0] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Revised: 03/06/2016] [Accepted: 03/14/2016] [Indexed: 02/05/2023]
Abstract
Analyses to ensure food safety and quality are more relevant now because of rapid changes in the quantity, diversity and mobility of food. Food-contamination must be determined to maintain health and up-hold laws, as well as for ethical and cultural concerns. Real-time polymerase chain reaction (RT-PCR), a rapid and inexpensive quantitative method to detect the presence of targeted DNA-segments in samples, helps in determining both accidental and intentional adulterations of foods by biological contaminants. This review presents recent developments in theory, techniques, and applications of RT-PCR in food analyses, RT-PCR addresses the limitations of traditional food analyses in terms of sensitivity, range of analytes, multiplexing ability, cost, time, and point-of-care applications. A range of targets, including species of plants or animals which are used as food ingredients, food-borne bacteria or viruses, genetically modified organisms, and allergens, even in highly processed foods can be identified by RT-PCR, even at very low concentrations. Microfluidic RT-PCR eliminates the separate sample-processing step to create opportunities for point-of-care analyses. We also cover the challenges related to using RT-PCR for food analyses, such as the need to further improve sample handling.
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Affiliation(s)
- Nur Thaqifah Salihah
- Biosensors and Biotechnology Laboratory, Integrated Science Building, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong, BE 1410 Brunei Darussalam
| | | | - Hamadah Lubis
- Biosensors and Biotechnology Laboratory, Integrated Science Building, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong, BE 1410 Brunei Darussalam
| | - Minhaz Uddin Ahmed
- Biosensors and Biotechnology Laboratory, Integrated Science Building, Faculty of Science, Universiti Brunei Darussalam, Jalan Tungku Link, Gadong, BE 1410 Brunei Darussalam
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32
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Yang L, Aguilar ZP, Qu F, Xu H, Xu H, Wei H. Enhanced antimicrobial activity of silver nanoparticles-Lonicera Japonica Thunb combo. IET Nanobiotechnol 2016; 10:28-32. [PMID: 26766870 DOI: 10.1049/iet-nbt.2015.0027] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Silver metals have long been known to possess antimicrobial properties. Recently, even the nanoparticle version of silver (AgNPs) has also been established as antimicrobials. In this study AgNPs were combined with extracts of the medicinal plant Chinese honeysuckle, Lonicera japonica Thunb. The antimicrobial activity of the AgNPs-herb was tested against pathogenic Escherichia coli CMCC44113. Using different AgNPs or herb (honeysuckle water extract or HWE) ratios in the presence of a fixed concentration of E. coli CMCC44113, potencies were found to be proportional with concentrations. The antimicrobial activities of AgNPs-HWE combo were significant enhanced, when compared with solely AgNPs or HWE. Thus, atomic force microscopic and propidium monoazide-PCR were used to probe the damages caused by AgNPs-HWE combo on the cell morphology and cell membrane integrity of E. coli. The mechanism of AgNPs-HWE combo against E. coli may attribute to AgNPs leads to cell wall lysis and damages cell membrane integrity, and thus increases the penetration of HWE into the bacterium, which results in more serious damage to bacterial cells. These findings indicated that AgNPs-herb was more potent than the AgNPs alone and holds promise for the development of nanoparticle enhanced herbal pharmaceuticals.
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Affiliation(s)
- Lin Yang
- Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang 330047, People's Republic of China
| | | | - Feng Qu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, People's Republic of China
| | - Hong Xu
- Ocean NanoTech LLC, 2143 Worth Lane, Springdale, AR 72764, USA
| | - Hengyi Xu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, People's Republic of China.
| | - Hua Wei
- Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang 330047, People's Republic of China
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33
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Xue H, Zhang B, He B, Wang Z, Chen C. Rapid Immunochromatographic Assay for Escherichia coli O157:H7 in Bovine Milk Using IgY Labeled by Fe 3O 4/Au Composite Nanoparticles. FOOD SCIENCE AND TECHNOLOGY RESEARCH 2016. [DOI: 10.3136/fstr.22.53] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Haiyan Xue
- College of Life Science and Engineering, Shaanxi University of Science and Technology
- College of Life Science, Northwest University
| | - Baoyan Zhang
- College of Life Science and Engineering, Shaanxi University of Science and Technology
| | - Baoyuan He
- College of Resource and Environment, Shaanxi University of Science and Technology
| | - Zhanyong Wang
- College of Life Science and Engineering, Shaanxi University of Science and Technology
| | - Chao Chen
- College of Life Science, Northwest University
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34
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A microfluidic droplet digital PCR for simultaneous detection of pathogenic Escherichia coli O157 and Listeria monocytogenes. Biosens Bioelectron 2015; 74:770-7. [DOI: 10.1016/j.bios.2015.07.016] [Citation(s) in RCA: 124] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2015] [Revised: 06/30/2015] [Accepted: 07/08/2015] [Indexed: 01/08/2023]
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35
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Wang L, Ye C, Xu H, Aguilar ZP, Xiong Y, Lai W, Wei H. Development of an SD-PMA-mPCR assay with internal amplification control for rapid and sensitive detection of viable Salmonella spp., Shigella spp. and Staphylococcus aureus in food products. Food Control 2015. [DOI: 10.1016/j.foodcont.2015.04.016] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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36
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Huang R, Tao X, Wan C, Li S, Xu H, Xu F, Shah NP, Wei H. In vitro probiotic characteristics of Lactobacillus plantarum ZDY 2013 and its modulatory effect on gut microbiota of mice. J Dairy Sci 2015; 98:5850-61. [DOI: 10.3168/jds.2014-9153] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Accepted: 05/05/2015] [Indexed: 11/19/2022]
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37
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Development of a quantitative real time PCR assay to detect and enumerate Escherichia coli O157 and O26 serogroups in bovine recto-anal swabs. J Microbiol Methods 2015; 114:9-15. [DOI: 10.1016/j.mimet.2015.04.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 04/16/2015] [Accepted: 04/16/2015] [Indexed: 01/29/2023]
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38
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Shan S, Lai W, Xiong Y, Wei H, Xu H. Novel strategies to enhance lateral flow immunoassay sensitivity for detecting foodborne pathogens. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:745-53. [PMID: 25539027 DOI: 10.1021/jf5046415] [Citation(s) in RCA: 115] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Food contaminated by foodborne pathogens causes diseases, affects individuals, and even kills those affected individuals. As such, rapid and sensitive detection methods should be developed to screen pathogens in food. One current detection method is lateral flow immunoassay, an efficient technique because of several advantages, including rapidity, simplicity, stability, portability, and sensitivity. This review presents the format and principle of lateral flow immunoassay strip and the development of conventional lateral flow immunoassay for detecting foodborne pathogens. Furthermore, novel strategies that can be applied to enhance the sensitivity of lateral flow immunoassay to detect foodborne pathogens are presented; these strategies include innovating new label application, designing new formats of lateral flow immunoassay, combining with other methods, and developing signal amplification systems. With these advancements, detection sensitivity and detection time can be greatly improved.
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Affiliation(s)
- Shan Shan
- State Key Laboratory of Food Science and Technology, Nanchang University , Nanchang 330047, China
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39
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Wang JY, Chen MH, Sheng ZC, Liu DF, Wu SS, Lai WH. Development of colloidal gold immunochromatographic signal-amplifying system for ultrasensitive detection of Escherichia coli O157:H7 in milk. RSC Adv 2015. [DOI: 10.1039/c5ra13279g] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A colloidal gold immunochromatographic signal-amplifying test strip with a sandwich format was successfully developed to detect Escherichia coli O157:H7.
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Affiliation(s)
- Jing-Yun Wang
- State Key Laboratory of Food Science and Technology
- Nanchang University
- 235 Nanjing East Road, Nanchang
- China
| | - Ming-Hui Chen
- State Key Laboratory of Food Science and Technology
- Nanchang University
- 235 Nanjing East Road, Nanchang
- China
| | - Zhi-Chao Sheng
- Lianyungang Entry-Exit Inspection and Quarantine Bureau
- Lianyungang
- China
| | - Dao-Feng Liu
- State Key Laboratory of Food Science and Technology
- Nanchang University
- 235 Nanjing East Road, Nanchang
- China
| | - Song-Song Wu
- State Key Laboratory of Food Science and Technology
- Nanchang University
- 235 Nanjing East Road, Nanchang
- China
| | - Wei-Hua Lai
- State Key Laboratory of Food Science and Technology
- Nanchang University
- 235 Nanjing East Road, Nanchang
- China
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40
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Liu H, Niu YD, Li J, Stanford K, McAllister TA. Rapid and accurate detection of bacteriophage activity against Escherichia coli O157:H7 by propidium monoazide real-time PCR. BIOMED RESEARCH INTERNATIONAL 2014; 2014:319351. [PMID: 25530959 PMCID: PMC4233675 DOI: 10.1155/2014/319351] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Accepted: 08/10/2014] [Indexed: 01/12/2023]
Abstract
Conventional methods to determine the efficacy of bacteriophage (phage) for biocontrol of E. coli require several days, due to the need to culture bacteria. Furthermore, cell surface-attached phage particles may lyse bacterial cells during experiments, leading to an overestimation of phage activity. DNA-based real-time quantitative polymerase chain reaction (qPCR) is a fast, sensitive, and highly specific means of enumerating pathogens. However, qPCR may underestimate phage activity due to its inability to distinguish viable from nonviable cells. In this study, we evaluated the suitability of propidium monoazide (PMA), a microbial membrane-impermeable dye that inhibits amplification of extracellular DNA and DNA within dead or membrane-compromised cells as a means of using qPCR to identify only intact E. coli cells that survive phage exposure. Escherichia coli O157:H7 strain R508N and 4 phages (T5-like, T1-like, T4-like, and O1-like) were studied. Results compared PMA-qPCR and direct plating and confirmed that PMA could successfully inhibit amplification of DNA from compromised/damaged cells E. coli O157:H7. Compared to PMA-qPCR, direct plating overestimated (P < 0.01) phage efficacy as cell surface-attached phage particles lysed E. coli O157:H7 during the plating process. Treatment of samples with PMA in combination with qPCR can therefore be considered beneficial when assessing the efficacy of bacteriophage for biocontrol of E. coli O157:H7.
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Affiliation(s)
- Hui Liu
- College of Animal Science, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China
- Lethbridge Research Centre, Agriculture and Agri-Food Canada, Lethbridge, AB, Canada T1J 4B1
| | - Yan D. Niu
- Alberta Agriculture and Rural Development, Agriculture Centre, Lethbridge, AB, Canada T1J 4V6
| | - Jinquan Li
- College of Animal Science, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010018, China
| | - Kim Stanford
- Alberta Agriculture and Rural Development, Agriculture Centre, Lethbridge, AB, Canada T1J 4V6
| | - Tim A. McAllister
- Lethbridge Research Centre, Agriculture and Agri-Food Canada, Lethbridge, AB, Canada T1J 4B1
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41
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Barbau-Piednoir E, Mahillon J, Pillyser J, Coucke W, Roosens NH, Botteldoorn N. Evaluation of viability-qPCR detection system on viable and dead Salmonella serovar Enteritidis. J Microbiol Methods 2014; 103:131-7. [DOI: 10.1016/j.mimet.2014.06.003] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Revised: 06/02/2014] [Accepted: 06/02/2014] [Indexed: 11/25/2022]
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