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Tirloni E, Bernardi C, Fusi V, Sgoifo Rossi CA, Stella S. Microbiological and physicochemical profile of Italian steak tartare and predicting growth potential of Listeria monocytogenes. Heliyon 2024; 10:e30883. [PMID: 38765030 PMCID: PMC11097062 DOI: 10.1016/j.heliyon.2024.e30883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 05/07/2024] [Accepted: 05/07/2024] [Indexed: 05/21/2024] Open
Abstract
In the present study, growth potential of Listeria monocytogenes in steak tartare samples taken at retail and belonging to 13 brands marketed in Northern Italy was investigated. The samples were submitted to microbiological and chemical-physical characterization. The data obtained were used as inputs for the application of the predictive microbiology software FSSP that allows the estimation of the growth of L. monocytogenes during the shelf-life. Lactic acid bacteria, the main component of the microflora, gave variable counts among the brands (from 3.38 to 6.24 log CFU/g). pH and aw values were always higher than 5.3 and 0.96, respectively, thus they could not be considered as single efficient hurdles to prevent the growth of L. monocytogenes according to the EC Reg. 2073/2005; the same was observed for salt content (constantly <2 %) and nitrites (not quantifiable in all the samples, even if declared in some labels). Nevertheless, the combination of all the hurdles, evaluated by predictive microbiology using critical development factors, resulted in an estimated growth <0.5 log CFU/g throughout the shelf life; this output allowed us to consider all the steak tartare analysed as unfavourable substrate for L. monocytogenes growth. The information obtained could be useful for tartare producers as well as for competent authority to evaluate the effective risk concerning these typology of products.
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Affiliation(s)
- Erica Tirloni
- Department of Veterinary Medicine and Animal Sciences, University of Milan, Via Dell’Università 6, I-26020, Lodi, Italy
| | - Cristian Bernardi
- Department of Veterinary Medicine and Animal Sciences, University of Milan, Via Dell’Università 6, I-26020, Lodi, Italy
| | - Viviana Fusi
- Department of Veterinary Medicine and Animal Sciences, University of Milan, Via Dell’Università 6, I-26020, Lodi, Italy
| | - Carlo Angelo Sgoifo Rossi
- Department of Veterinary Medicine and Animal Sciences, University of Milan, Via Dell’Università 6, I-26020, Lodi, Italy
| | - Simone Stella
- Department of Veterinary Medicine and Animal Sciences, University of Milan, Via Dell’Università 6, I-26020, Lodi, Italy
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2
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Dursun A, Güler Z. Elution Conditions for Effective Separation on an Aged Sulfonated Polystyrene-Divinylbenzene (SPD) Column of Organic Acids from Meat. FOOD ANAL METHOD 2023. [DOI: 10.1007/s12161-023-02448-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Iacumin L, Cappellari G, Colautti A, Comi G. Listeria monocytogenes Survey in Cubed Cooked Ham Packaged in Modified Atmosphere and Bioprotective Effect of Selected Lactic Acid Bacteria. Microorganisms 2020; 8:microorganisms8060898. [PMID: 32549230 PMCID: PMC7356115 DOI: 10.3390/microorganisms8060898] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 06/09/2020] [Accepted: 06/11/2020] [Indexed: 01/09/2023] Open
Abstract
The aim of this work was to study the presence of Listeria monocytogenes, as well as the potential activity of two bioprotective cultures (Lyocarni BOX-74 and Lyocarni BOX-57), versus a mix of three L. monocytogenes strains that were intentionally inoculated in cooked cubed ham, packaged in Modified Atmosphere Packaging and stored at different temperatures. The bioprotective cultures limit L. monocytogenes growth in cubed cooked ham stored either at 4 °C for 60 days and at 4 °C for 20 days and at 8 °C for 40 days. The inhibition at 8 °C is particularly useful for industrial cooked meat products, considering there are often thermal abuse conditions (8 °C) in the supermarkets. Both the starters can eliminate L. monocytogenes risk and maintain the products safe, despite the thermal abuse conditions. In addition, both culture starters grew without producing perceptible sensory variations in the samples, as demonstrated by the panel of the untrained tasters. The bioprotective LAB produced neither off-odours and off-flavours, nor white/viscous patinas, slime, discoloration or browning. Therefore, according to the obtained data, and despite the fact that cooked cubed ham did not show pH ≤ 4.4 or aw ≤ 0.92, or pH ≤ 5.0 and aw ≤ 0.94, as cited in the EC Regulation 2073/2005. It can be scientifically stated that cubes of cooked ham with the addition of bioprotective starters cultures do not constitute a favourable substrate for L. monocytogenes growth. Consequently, these products can easily fall into category 1.3 (ready-to-eat foods that are not favourable to L. monocytogenes growth, other than those for infants and for special medical purposes), in which a maximum concentration of L. monocytogenes of 100 CFU g−1 is allowed.
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Golden CE, Rothrock MJ, Mishra A. Using Farm Practice Variables as Predictors of Listeria spp. Prevalence in Pastured Poultry Farms. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2019. [DOI: 10.3389/fsufs.2019.00015] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
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6
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Suo Y, Gao S, Baranzoni GM, Xie Y, Liu Y. Comparative transcriptome RNA-Seq analysis of Listeria monocytogenes with sodium lactate adaptation. Food Control 2018. [DOI: 10.1016/j.foodcont.2018.03.044] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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7
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Geeraerts W, Pothakos V, De Vuyst L, Leroy F. Variability within the dominant microbiota of sliced cooked poultry products at expiration date in the Belgian retail. Food Microbiol 2018. [PMID: 29526205 DOI: 10.1016/j.fm.2018.01.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Sliced cooked poultry products are susceptible to bacterial spoilage, notwithstanding their storage under modified-atmosphere packaging (MAP) in the cold chain. Although the prevailing bacterial communities are known to be mostly consisting of lactic acid bacteria (LAB), more information is needed about the potential variation in species diversity within national markets. In the present study, a total of 42 different samples of sliced cooked poultry products were collected in the Belgian retail and their bacterial communities were analysed at expiration date. A total of 629 isolates from four different culture media, including plate count agar for the total microbiota and de Man-Rogosa-Sharpe (MRS), modified MRS, and M17 agar as three selective agar media for LAB, were subjected to (GTG)5-PCR fingerprinting and identification by gene sequencing. Overall, Carnobacterium, Lactobacillus, and Leuconostoc were the dominant genera. Within each genus, the most encountered isolates were Carnobacterium divergens, Lactobacillus sakei, and Leuconostoc carnosum. When comparing samples from chicken origin with samples from turkey-derived products, a higher dominance of Carnobacteria spp. was found in the latter group. Also, an association between the dominance of lactobacilli and the presence of added plant material and lactate salts was found.
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Affiliation(s)
- Wim Geeraerts
- Research Group of Industrial Microbiology and Food Biotechnology (IMDO), Faculty of Sciences and Bioengineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
| | - Vasileios Pothakos
- Research Group of Industrial Microbiology and Food Biotechnology (IMDO), Faculty of Sciences and Bioengineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
| | - Luc De Vuyst
- Research Group of Industrial Microbiology and Food Biotechnology (IMDO), Faculty of Sciences and Bioengineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium
| | - Frédéric Leroy
- Research Group of Industrial Microbiology and Food Biotechnology (IMDO), Faculty of Sciences and Bioengineering Sciences, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium.
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Horita CN, Baptista RC, Caturla MY, Lorenzo JM, Barba FJ, Sant’Ana AS. Combining reformulation, active packaging and non-thermal post-packaging decontamination technologies to increase the microbiological quality and safety of cooked ready-to-eat meat products. Trends Food Sci Technol 2018. [DOI: 10.1016/j.tifs.2017.12.003] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Castellano P, Peña N, Ibarreche MP, Carduza F, Soteras T, Vignolo G. Antilisterial efficacy of Lactobacillus bacteriocins and organic acids on frankfurters. Impact on sensory characteristics. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2018; 55:689-697. [PMID: 29391633 PMCID: PMC5785394 DOI: 10.1007/s13197-017-2979-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 11/21/2017] [Accepted: 11/29/2017] [Indexed: 10/18/2022]
Abstract
Dipping solutions containing bacteriocins produced by Lactobacillus curvatus CRL705 and Lactobacillus sakei CRL1862 (Bact705/1862), nisin and organic acids (lactic acid, LA; acetic acid, AA) were tested alone or in combination against Listeria monocytogenes inoculated by immersion on vacuum-packaged frankfurters stored at 10 °C during 36 days. LA/AA solution (2.5% v/v each) reduced pathogen population by 1.50 log10 CFU/ml during storage. Semi-purified Bact705/1862 prevented L. monocytogenes growth, while nisin was not able to avoid its regrowth after 20 days. The combined addition of Bact705/1862 + LA/AA was the most effective approach for pathogen reduction below detection level from day 6 to final storage. Frankfurters treated with Bact705/1862 + LA/AA compared to fresh-purchased samples did not show significant differences in flavor, juiciness, color intensity and overall preference at 22 days-storage at 5 °C. Meat processors should not only validate the antimicrobial efficacy of combined treatments but also their sensory impact on the product, which is directly related to consumer acceptability.
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Affiliation(s)
- Patricia Castellano
- Centro de Referencia para Lactobacilos (CERELA), Chacabuco 145, T4000ILC Tucumán, Argentina
| | - Natalia Peña
- Centro de Referencia para Lactobacilos (CERELA), Chacabuco 145, T4000ILC Tucumán, Argentina
| | | | - Fernando Carduza
- Instituto de Tecnología de Alimentos, CIA, INTA, CC 77, B1708WAB Morón, Buenos Aires Argentina
| | - Trinidad Soteras
- Instituto de Tecnología de Alimentos, CIA, INTA, CC 77, B1708WAB Morón, Buenos Aires Argentina
| | - Graciela Vignolo
- Centro de Referencia para Lactobacilos (CERELA), Chacabuco 145, T4000ILC Tucumán, Argentina
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Locatelli A, Lewis MA, Rothrock MJ. The Distribution of Listeria in Pasture-Raised Broiler Farm Soils Is Potentially Related to University of Vermont Medium Enrichment Bias toward Listeria innocua over Listeria monocytogenes. Front Vet Sci 2017; 4:227. [PMID: 29312967 PMCID: PMC5742580 DOI: 10.3389/fvets.2017.00227] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 12/11/2017] [Indexed: 11/29/2022] Open
Abstract
The occurrence of Listeria monocytogenes has been widely investigated in the poultry production chain from the processing plant to the final product. However, limited data are available on Listeria species, including Listeria monocytogenes, in the poultry farm environment. Therefore, fecal and soil samples from 37 pastured poultry flocks from 10 all-natural farms over 3 years were assessed to determine the prevalence and diversity of Listeria within these alternative poultry farm environments using standard cultural and molecular methods. Listeria species were isolated in 15% of poultry farm samples and included Listeria innocua (65.7%), L. monocytogenes (17.4%), and Listeria welshimeri (15.1%). Additional multiplex PCR serotyping showed group 1/2a-3a to be the most dominant L. monocytogenes serovar group. Based on these results, monoculture growth experiments were conducted on four Listeria soil isolates (three L. monocytogenes isolates representing the three recovered serovar groups and one L. innocua isolate) to determine if culture medium [tripticase soy broth (TSB) and University of Vermont modified Listeria enrichment broth (UVM)], inoculum concentration (102 or 105 CFU/ml), or incubation temperature (20, 30, and 42°C) differentially affected these Listeria species. Overall, very few significant growth differences were observed between the behavior of the three L. monocytogenes isolates (representing the three recovered serovar groups) under the growth conditions tested. Alternatively, at 30°C in UVM with the lower inoculum concentration, the L. innocua isolate had a significantly shorter lag phase than the L. monocytogenes isolates. In coculture growth studies under these same incubation conditions, the lag phase of L. innocua and L. monocytogenes was similar, but the final concentration of L. innocua was significantly higher than L. monocytogenes. However, cocultures in UVM for high inoculum concentration did not show preferential growth of L. innocua over L. monocytogenes. These results indicate that the use of UVM as an enrichment medium may preferentially allow L. innocua to outcompete L. monocytogenes at low concentrations, biasing the Listeria prevalence from these farm samples toward L. innocua and potentially underreporting the presence of L. monocytogenes in these environments.
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Affiliation(s)
- Aude Locatelli
- Egg Safety and Quality Research Unit, U.S. National Poultry Research Center, Agricultural Research Service, United States Department of Agriculture, Athens, GA, United States
| | - Micah A. Lewis
- Quality and Safety Assessment Research Unit, U.S. National Poultry Research Center, Agricultural Research Service, United States Department of Agriculture, Athens, GA, United States
| | - Michael J. Rothrock
- Egg Safety and Quality Research Unit, U.S. National Poultry Research Center, Agricultural Research Service, United States Department of Agriculture, Athens, GA, United States
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11
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Zhao X, Kasbi M, Chen J, Peres S, Jolicoeur M. A dynamic metabolic flux analysis of ABE (acetone-butanol-ethanol) fermentation byClostridium acetobutylicumATCC 824, with riboflavin as a by-product. Biotechnol Bioeng 2017; 114:2907-2919. [DOI: 10.1002/bit.26393] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2017] [Accepted: 07/24/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Xinhe Zhao
- Research Laboratory in Applied Metabolic Engineering; Department of Chemical Engineering; École Polytechnique de Montréal; Montréal Québec Canada
| | - Mayssa Kasbi
- Research Laboratory in Applied Metabolic Engineering; Department of Chemical Engineering; École Polytechnique de Montréal; Montréal Québec Canada
| | - Jingkui Chen
- Research Laboratory in Applied Metabolic Engineering; Department of Chemical Engineering; École Polytechnique de Montréal; Montréal Québec Canada
| | - Sabine Peres
- LRI, Université Paris-Sud; CNRS, Université Paris-Saclay; Orsay France
- MaIAGE, INRA; Université Paris-Saclay; Jouy-en-Josas France
| | - Mario Jolicoeur
- Research Laboratory in Applied Metabolic Engineering; Department of Chemical Engineering; École Polytechnique de Montréal; Montréal Québec Canada
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Szczawiński J, Ewa Szczawińska M, Łobacz A, Tracz M, Jackowska-Tracz A. Modelling the Growth Rate of Listeria Monocytogenes in Cooked Ham Stored at Different Temperatures. J Vet Res 2017; 61:45-51. [PMID: 29978054 DOI: 10.1515/jvetres-2017-0006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 03/10/2017] [Indexed: 11/15/2022] Open
Abstract
Introduction The purpose of the study was to determine and model the growth rates of L. monocytogenes in cooked cured ham stored at various temperatures. Material and Methods Samples of cured ham were artificially contaminated with a mixture of three L. monocytogenes strains and stored at 3, 6, 9, 12, or 15ºC for 16 days. The number of listeriae was determined after 0, 1, 2, 3, 5, 7, 9, 12, 14, and 16 days. A series of decimal dilutions were prepared from each sample and plated onto ALOA agar, after which the plates were incubated at 37ºC for 48 h under aerobic conditions. The bacterial counts were logarithmised and analysed statistically. Five repetitions of the experiment were performed. Results Both storage temperature and time were found to significantly influence the growth rate of listeriae (P > 0.01). The test bacteria growth curves were fitted to three primary models: the Gompertz, Baranyi, and logistic. The mean square error (MSE) and Akaike's information criterion (AIC) were calculated to evaluate the goodness of fit. It transpired that the logistic model fit the experimental data best. The natural logarithms of L. monocytogenes' mean growth rates from this model were fitted to two secondary models: the square root and polynomial. Conclusion Modelling in both secondary types can predict the growth rates of L. monocytogenes in cooked cured ham stored at each studied temperature, but mathematical validation showed the polynomial model to be more accurate.
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Affiliation(s)
- Jacek Szczawiński
- Department of Food Hygiene and Public Health, Faculty of Veterinary Medicine, University of Life Sciences, 02-776 Warsaw, Poland
| | - Małgorzata Ewa Szczawińska
- Department of Food Hygiene and Public Health, Faculty of Veterinary Medicine, University of Life Sciences, 02-776 Warsaw, Poland
| | - Adriana Łobacz
- Chair of Dairy and Quality Management, Faculty of Food Sciences, University of Warmia and Mazury in Olsztyn, 10-719 Olsztyn, Poland
| | - Michał Tracz
- Department of Food Hygiene and Public Health, Faculty of Veterinary Medicine, University of Life Sciences, 02-776 Warsaw, Poland
| | - Agnieszka Jackowska-Tracz
- Department of Food Hygiene and Public Health, Faculty of Veterinary Medicine, University of Life Sciences, 02-776 Warsaw, Poland
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Nguyen TT, Van Giau V, Vo TK. Multiplex PCR for simultaneous identification of E. coli O157:H7, Salmonella spp. and L. monocytogenes in food. 3 Biotech 2016; 6:205. [PMID: 28330283 PMCID: PMC5042906 DOI: 10.1007/s13205-016-0523-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 09/14/2016] [Indexed: 11/26/2022] Open
Abstract
The rapid detection of pathogens in food is becoming increasingly critical for ensuring the safety of consumers, since the majority of food-borne illnesses and deaths are caused by pathogenic bacteria. Hence, rapid, sensitive, inexpensive and convenient approaches to detect food-borne pathogenic bacteria is essential in controlling food safety. In this study, a multiplex PCR assay for the rapid and simultaneous detection of Escherichia coli O157:H7, Salmonella spp. and Listeria monocytogenes was established. The invA, stx and hlyA genes specifically amplified DNA fragments of 284, 404 and 510 bp from Salmonella spp., L. monocytogenes and E. coli O157:H7, respectively. The 16S rRNA gene was targeted as an internal control gene in the presence of bacterial DNA. The specificity and sensitivity of the multiplex PCR were performed by testing different strains. The multiplex PCR assay was able to specifically simultaneously detect ten colony-forming unit/mL of each pathogen in artificially inoculated samples after enrichment for 12 h. The whole process took less than 24 h to complete, indicating that the assay is suitable for reliable and rapid identification of these three food-borne pathogens, which could be suitable in microbial epidemiology investigation.
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Affiliation(s)
- Thuy Trang Nguyen
- Department of Pharmacy, Ho Chi Minh City University of Technology (HUTECH), 475A Dien Bien Phu Street, Ward 25, Binh Thanh District, Ho Chi Minh City, Vietnam
- Department of BionanoTechnology, Gachon Medical Research Institute, Gachon University, Sungnam, Korea
| | - Vo Van Giau
- Department of Faculty of Food Technology, Ho Chi Minh City University of Food Industry (HUFI), 140 Le Trong Tan, Tan Phu district, Ho Chi Minh City, Vietnam.
- Department of BionanoTechnology, Gachon Medical Research Institute, Gachon University, Sungnam, Korea.
| | - Tuong Kha Vo
- Vietnam Sports Hospital, Ministry of Culture, Sports and Tourism, Do Xuan Hop Road, My Dinh I Ward, Nam Tu Liem District, Hanoi, Vietnam.
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14
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Brasileiro IS, Barbosa M, Igarashi MC, Biscola V, Maffei DF, Landgraf M, Franco BDGDM. Use of growth inhibitors for control of Listeria monocytogenes in heat-processed ready-to-eat meat products simulating post-processing contamination. Lebensm Wiss Technol 2016. [DOI: 10.1016/j.lwt.2016.06.069] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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A Rapid and Sensitive Method for Simultaneous Screening of Nine Foodborne Pathogens Using High-Performance Liquid Chromatography Assay. FOOD ANAL METHOD 2016. [DOI: 10.1007/s12161-016-0672-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Xu YG, Sun B, Zhao HY, Liu ZM, Jiang YP, Wang L, Qiao XY, Li YJ, Tang LJ. Development and evaluation of a dual priming oligonucleotide system-based multiplex PCR assay for simultaneous detection of six foodborne pathogens. Eur Food Res Technol 2016. [DOI: 10.1007/s00217-016-2765-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Gallagher D, Pouillot R, Hoelzer K, Tang J, Dennis SB, Kause JR. Listeria monocytogenes in Retail Delicatessens: An Interagency Risk Assessment-Risk Mitigations. J Food Prot 2016; 79:1076-88. [PMID: 27357026 DOI: 10.4315/0362-028x.jfp-15-336] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Cross-contamination, improper holding temperatures, and insufficient sanitary practices are known retail practices that may lead to product contamination and growth of Listeria monocytogenes. However, the relative importance of control options to mitigate the risk of invasive listeriosis from ready-to-eat (RTE) products sliced or prepared at retail is not well understood. This study illustrates the utility of a quantitative risk assessment model described in a first article of this series (Pouillot, R., D. Gallagher, J. Tang, K. Hoelzer, J. Kause, and S. B. Dennis, J. Food Prot. 78:134-145, 2015) to evaluate the public health impact associated with changes in retail deli practices and interventions. Twenty-two mitigation scenarios were modeled and evaluated under six different baseline conditions. These scenarios were related to sanitation, worker behavior, use of growth inhibitors, cross-contamination, storage temperature control, and reduction of the level of L. monocytogenes on incoming RTE food products. The mean risk per serving of RTE products obtained under these scenarios was then compared with the risk estimated in the baseline condition. Some risk mitigations had a consistent impact on the predicted listeriosis risk in all baseline conditions (e.g. presence or absence of growth inhibitor), whereas others were greatly dependent on the initial baseline conditions or practices in the deli (e.g. preslicing of products). Overall, the control of the bacterial growth and the control of contamination at its source were major factors of listeriosis risk in these settings. Although control of cross-contamination and continued sanitation were also important, the decrease in the predicted risk was not amenable to a simple solution. Findings from these predictive scenario analyses are intended to encourage improvements to retail food safety practices and mitigation strategies to control L. monocytogenes in RTE foods more effectively and to demonstrate the utility of quantitative risk assessment models to inform risk management decisions.
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Affiliation(s)
- Daniel Gallagher
- Department of Civil and Environmental Engineering, 409 Durham Hall, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
| | - Régis Pouillot
- U.S. Food and Drug Administration, Center for Food Safety and Applied Nutrition, 5100 Paint Branch Parkway, College Park, Maryland 20740, USA.
| | - Karin Hoelzer
- U.S. Food and Drug Administration, Center for Food Safety and Applied Nutrition, 5100 Paint Branch Parkway, College Park, Maryland 20740, USA; Pew Charitable Trusts, 901 E Street N.W., Washington, DC 20004, USA
| | - Jia Tang
- Department of Civil and Environmental Engineering, 409 Durham Hall, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
| | - Sherri B Dennis
- U.S. Food and Drug Administration, Center for Food Safety and Applied Nutrition, 5100 Paint Branch Parkway, College Park, Maryland 20740, USA
| | - Janell R Kause
- Office of Public Health Science, Food Safety and Inspection Service, U.S. Department of Agriculture, 1400 Independence Avenue S.W., Washington, D.C. 20250, USA
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Zhao X, Condruz S, Chen J, Jolicoeur M. A quantitative metabolomics study of high sodium response in Clostridium acetobutylicum ATCC 824 acetone-butanol-ethanol (ABE) fermentation. Sci Rep 2016; 6:28307. [PMID: 27321153 PMCID: PMC4913259 DOI: 10.1038/srep28307] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 05/31/2016] [Indexed: 01/06/2023] Open
Abstract
Hemicellulose hydrolysates, sugar-rich feedstocks used in biobutanol refinery, are normally obtained by adding sodium hydroxide in the hydrolyze process. However, the resulting high sodium concentration in the hydrolysate inhibits ABE (acetone-butanol-ethanol) fermentation, and thus limits the use of these low-cost feedstocks. We have thus studied the effect of high sodium on the metabolic behavior of Clostridium acetobutyricum ATCC 824, with xylose as the carbon source. At a threshold sodium concentration of 200 mM, a decrease of the maximum cell dry weight (−19.50 ± 0.85%) and of ABE yield (−35.14 ± 3.50% acetone, −33.37 ± 0.74% butanol, −22.95 ± 1.81% ethanol) were observed compared to control culture. However, solvents specific productivities were not affected by supplementing sodium. The main effects of high sodium on cell metabolism were observed in acidogenesis, during which we observed the accumulation of ATP and NADH, and the inhibition of the pentose phosphate (PPP) and the glycolytic pathways with up to 80.73 ± 1.47% and 68.84 ± 3.42% decrease of the associated metabolic intermediates, respectively. However, the NADP+-to-NADPH ratio was constant for the whole culture duration, a phenomenon explaining the robustness of solvents specific productivities. Therefore, high sodium, which inhibited biomass growth through coordinated metabolic effects, interestingly triggered cell robustness on solvents specific productivity.
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Affiliation(s)
- Xinhe Zhao
- Research Laboratory in Applied Metabolic Engineering, Department of Chemical Engineering, École Polytechnique de Montréal, P.O. Box 6079, Centre-ville Station, Montreal, Quebec, H3C 3A7, Canada
| | - Stefan Condruz
- Research Laboratory in Applied Metabolic Engineering, Department of Chemical Engineering, École Polytechnique de Montréal, P.O. Box 6079, Centre-ville Station, Montreal, Quebec, H3C 3A7, Canada
| | - Jingkui Chen
- Research Laboratory in Applied Metabolic Engineering, Department of Chemical Engineering, École Polytechnique de Montréal, P.O. Box 6079, Centre-ville Station, Montreal, Quebec, H3C 3A7, Canada
| | - Mario Jolicoeur
- Research Laboratory in Applied Metabolic Engineering, Department of Chemical Engineering, École Polytechnique de Montréal, P.O. Box 6079, Centre-ville Station, Montreal, Quebec, H3C 3A7, Canada
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20
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Liu ZM, Xu YG, Luo J, Qu M, Mo CS, Li SL. Target-Enriched Multiplex PCR (Tem-PCR) Assay for Simultaneous Detection of S
almonella
spp., L
isteria Monocytogenes
and E
scherichia Coli
O157:H7 in Food. J Food Saf 2015. [DOI: 10.1111/jfs.12225] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Zhong-Mei Liu
- Technology Center; Heilongjiang Entry-Exit Inspection and Quarantine Bureau; Harbin 150001 China
| | - Yi-Gang Xu
- Technology Center; Heilongjiang Entry-Exit Inspection and Quarantine Bureau; Harbin 150001 China
- College of Veterinary Medicine; Northeast Agricultural University; Harbin 150030 China
| | - Jia Luo
- Technology Center; Liaoning Entry-Exit Inspection and Quarantine Bureau; Dalian China
| | - Min Qu
- College of Food Engineering; Harbin University of Commerce; Harbin China
| | - Chun-Sheng Mo
- College of Food Engineering; Harbin University of Commerce; Harbin China
| | - Su-Long Li
- Technology Center; Heilongjiang Entry-Exit Inspection and Quarantine Bureau; Harbin 150001 China
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Pereira da Costa M, Conte-Junior CA. Chromatographic Methods for the Determination of Carbohydrates and Organic Acids in Foods of Animal Origin. Compr Rev Food Sci Food Saf 2015. [DOI: 10.1111/1541-4337.12148] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Quantifying viable Vibrio parahaemolyticus and Listeria monocytogenes simultaneously in raw shrimp. Appl Microbiol Biotechnol 2015; 99:6451-62. [DOI: 10.1007/s00253-015-6715-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2015] [Revised: 05/16/2015] [Accepted: 05/21/2015] [Indexed: 02/06/2023]
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