The Experts below are selected from a list of 174 Experts worldwide ranked by ideXlab platform
Maarten Nauta - One of the best experts on this subject based on the ideXlab platform.
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Evaluation of risk based Microbiological criteria for Campylobacter in broiler carcasses in Belgium using TRiMiCri
2020Co-Authors: Tomasz Seliwiorstow, Mieke Uyttendaele, Lieven De Zutter, Maarten NautaAbstract:markdownabstractCampylobacteriosis is the most frequently reported foodborne zoonosis worldwide. Consumer´s exposure to Campylobacter might be reduced by establishing a Microbiological Criterion (MC) for Campylobacter on broiler meat. In the present study two possible approaches were evaluated, using the freely available software tool for risk based Microbiological criteria TRiMiCri (http://tools.food.dtu.dk/trimicri). The first approach was the traditional one that implies a Microbiological limit (ML-MC) and the second one which is based on the relative risk estimate (RRL-MC). The analyses were based on Campylobacter quantitative data collected from 28 Campylobacter positive bathes processed in 6 Belgian broiler slaughterhouses. To evaluate the performance of ML-MC, n=6, different c (0,1,2) and m (100,1 000,10 000) were used. Results showed that more than 90% of Campylobacter positive batches were not complying with strict ML criteria based on the m=100 for all applied combination of c. The RRL approach requires a baseline risk which was estimated based on the Campylobacter baseline data collected in Belgium in 2008. Approximately 60% of evaluated Campylobacter positive batches account for higher risk than the baseline risk. For both approaches, application of less stringent criteria results in lower percentage of NC and higher minimum relative residual risks (MRRR; it refers to the change in risk when all batches are sampled and all NC batches undergo treatment that effectively eliminates Campylobacter so they are replaced by zero risk batches). It was also observed that the number of samples (n) had little effect on risk estimates. Additionally, the results from ML-MC and RRL-MC follow the same curve when plotting percentage of NC against MRRR. However, for RRL-MC the percentage of NC batches and MRRR was lower and higher, respectively. To conclude, obtained results indicate that TRiMiCri is a useful and user friendly tool to make a risk based decision on the choice of the MC.
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Application of TRiMiCri for the evaluation of risk based Microbiological criteria for Campylobacter on broiler meat
Microbial Risk Analysis, 2016Co-Authors: Tomasz Seliwiorstow, Mieke Uyttendaele, Lieven De Zutter, Maarten NautaAbstract:Abstract A potential solution for the reduction of consumer exposure to Campylobacter is establishing a Microbiological Criterion (MC) for Campylobacter on broiler meat. In the present study the freely available software tool TRiMiCri was applied to evaluate risk-based Microbiological criteria by two approaches: the traditional one that implies a Microbiological limit (ML-MC) and the second one which is based on the relative risk estimate (RRL-MC). A baseline risk was estimated based on the Belgian baseline data, whereas the data for the evaluated batches were Campylobacter counts from 28 Campylobacter positive batches sampled in six Belgian slaughterhouses. Results showed that approximately 60% of Campylobacter positive batches did not comply with ML criteria based on the n = 5, m = 1000 and c = 0 for ML-MC and equivalently for RRL criteria when RR crit = 1. As expected, the less stringent MCs decreased the percentages of non-compliance (NC) but they are less effective, as reflected in increased minimum relative residual risks (MRRRs). When the Belgian baseline is used, more batches are found to be compliant than when the Danish baseline provided by TRiMiCri is used. Based on this, the application of Microbiological criteria for Campylobacter in the EU is discussed. TRiMiCri provides user friendly software to evaluate the available data and can help risk managers in establishing risk based Microbiological criteria for Campylobacter in broiler meat.
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a risk based Microbiological Criterion that uses the relative risk as the critical limit
Food Control, 2015Co-Authors: Jens Kirk Andersen, Birgit Norrung, Simone Da Costa Alves Machado, Maarten NautaAbstract:Abstract A risk-based Microbiological Criterion is described, that is based on the relative risk associated to the analytical result of a number of samples taken from a food lot. The acceptable limit is a specific level of risk and not a specific number of microorganisms, as in other Microbiological criteria. The approach requires the availability of a quantitative Microbiological risk assessment model to get risk estimates for food products from sampled food lots. By relating these food lot risk estimates to the mean risk estimate associated to a representative baseline data set, a relative risk estimate can be obtained. This relative risk estimate then can be compared with a critical value, defined by the Criterion. This Microbiological Criterion based on a relative risk limit is particularly useful when quantitative enumeration data are available and when the prevalence of the microorganism of concern is relatively high. The use of the approach is therefore illustrated with an example of Campylobacter in broiler meat. It shows that this Microbiological Criterion can be applied in practice. An advantage of the method is that the acceptable limit is directly defined in terms of risk, without the need to define other food safety standards.
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Risk based Microbiological criteria for Campylobacter in broiler meat in the European Union
International Journal of Food Microbiology, 2012Co-Authors: Maarten Nauta, Moez Sanaa, Arie H. HavelaarAbstract:Quantitative Microbiological risk assessment (QMRA) allows evaluating the public health impact of food safety targets to support the control of foodborne pathogens. We estimate the risk reduction of setting Microbiological criteria (MCs) for Campylobacter on broiler meat in 25 European countries, applying quantitative data from the 2008 EU baseline survey. We demonstrate that risk based MCs can be derived without explicit consideration of Food Safety Objectives or Performance Objectives. Published QMRA models for the consumer phase and dose response provide a relation between Campylobacter concentration on skin samples and the attending probability of illness for the consumer. Probabilistic modelling is used to evaluate a set of potential MCs. We present the percentage of batches not complying with the potential criteria, in relation to the risk reduction attending totally efficient treatment of these batches. We find different risk estimates and different impacts of MCs in different countries, which offers a practical and flexible tool for risk managers to select the most appropriate MC by weighing the costs (i.e. non-compliant batches) and the benefits (i.e. reduction in public health risk). Our analyses show that the estimated percentage of batches not complying with the MC is better correlated with the risk estimate than surrogate risk measures like the flock prevalence or the arithmetic mean concentration of bacteria on carcasses, and would therefore be a good measure for the risk of Campylobacter on broiler meat in a particular country. Two uncertain parameters in the model are the ratio of within- and between-flock variances in concentrations, and the transition factor of skin sample concentrations to concentrations on the meat. Sensitivity analyses show that these parameters have a considerable effect on our results, but the impact of their uncertainty is small compared to that of the parameters defining the Microbiological Criterion and the concentration on the meat.
Graziella Mideletbourdin - One of the best experts on this subject based on the ideXlab platform.
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the effects of superchilled storage at 2 c on the Microbiological and organoleptic properties of cold smoked salmon before retail display
International Journal of Refrigeration-revue Internationale Du Froid, 2009Co-Authors: A. Beaufort, Mireille Cardinal, Alain Lebail, Graziella MideletbourdinAbstract:The aim of this study was to investigate the impact of superchilling (-2 degrees C) on the evolution of Listeria monocytogenes and organoleptic characteristics of cold-smoked salmon samples. An Hadamard matrix experimental design was carried out on artificially inoculated samples stored at +4 degrees C for 10 d and at +8 degrees C for 18 d to know the influence of four factors: salt content, strain, cold stiffening and superchilling time, on the level of L.monocytogenes in cold-smoked salmon. The growth of L. monocytogenes in naturally contaminated cold-smoked salmon and the organoleptic properties were investigated under superchilling conditions. Superchilling (-2 degrees C for 28 d) had a limited impact on some of the organoleptic properties but the level of L. monocytogenes at the end of the shelf-life (4 degrees C for 10 d and 8 degrees C for 18 d) could exceed the Microbiological Criterion set by the European legislation. (C) 2009 Elsevier Ltd and IIR. All rights reserved.
M. B. Cole - One of the best experts on this subject based on the ideXlab platform.
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Relating Microbiological criteria to food safety objectives and performance objectives
Food Control, 2009Co-Authors: M. Van Schothorst, R. L. Buchanan, T. Del Ross, Marcel H. Zwietering, M. B. ColeAbstract:Abstract Microbiological criteria, food safety objectives and performance objectives, and the relationship between them are discussed and described in the context of risk-based food safety management. A modified method to quantify the sensitivity of attributes sampling plans is presented to show how sampling plans can be designed to assess a Microbiological Criterion. Examples presented show that testing of processed foods for confirmation of safety is often not a practical option, because too many samples would need to be analysed. Nonetheless, in such cases the classical “ICMSF cases” and sampling schemes still offer a risk-based approach for examining food lots for regulatory or trade purposes.
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Relating Microbiological criteria to food safety objectives and performance objectives
Food Control, 2009Co-Authors: M. Van Schothorst, R. L. Buchanan, T. Del Ross, Marcel H. Zwietering, M. B. ColeAbstract:Microbiological criteria, food safety objectives and performance objectives, and the relationship between them are discussed and described in the context of risk-based food safety management. A modified method to quantify the sensitivity of attributes sampling plans is presented to show how sampling plans can be designed to assess a Microbiological Criterion. Examples presented show that testing of processed foods for confirmation of safety is often not a practical option, because too many samples would need to be analysed. Nonetheless, in such cases the classical "ICMSF cases" and sampling schemes still offer a risk-based approach for examining food lots for regulatory or trade purposes. © 2008 Elsevier Ltd. All rights reserved.
Courtney Baker - One of the best experts on this subject based on the ideXlab platform.
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Serial Aspergillus antigen monitoring in pediatric bone marrow transplant patients.
Journal of Pediatric Oncology Nursing, 2020Co-Authors: Courtney BakerAbstract:Invasive aspergillosis carries a high mortality rate in immunocompromised patients, such as bone marrow transplant patients. Favorable outcomes are dependent on early detection and treatment. Positive galactomannan antigenemia has been included as a Microbiological Criterion for probable or possible diagnosis of invasive aspergillosis. Detection of circulating Aspergillus DNA in the first positive galactomannan sample, with serial monitoring, could help in diagnosis of invasive aspergillosis in bone marrow transplant patients. Morbidity and mortality from aspergillosis can possibly be reduced if an early diagnosis is made and appropriate treatment initiated. An effective and accurate way of early detection of invasive aspergillosis is serial Aspergillus antigen monitoring.
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Serial Aspergillus antigen monitoring in pediatric bone marrow transplant patients
Journal of Pediatric Oncology Nursing, 2006Co-Authors: Courtney BakerAbstract:Invasive aspergillosis carries a high mortality rate in immunocompromised patients, such as bone marrow transplant patients. Favorable outcomes are dependent on early detection and treatment. Positive galactomannan antigenemia has been included as a Microbiological Criterion for probable or possible diagnosis of invasive aspergillosis. Detection of circulating Aspergillus DNA in the first positive galactomannan sample, with serial monitoring, could help in diagnosis of invasive aspergillosis in bone marrow transplant patients. Morbidity and mortality from aspergillosis can possibly be reduced if an early diagnosis is made and appropriate treatment initiated. An effective and accurate way of early detection of invasive aspergillosis is serial Aspergillus antigen monitoring. © 2006 by Association of Pediatric Hematology/Oncology Nurses.
A. Beaufort - One of the best experts on this subject based on the ideXlab platform.
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The effects of superchilled storage at −2 °C on the Microbiological and organoleptic properties of cold-smoked salmon before retail display ☆
International Journal of Refrigeration-revue Internationale Du Froid, 2009Co-Authors: A. Beaufort, Mireille Cardinal, Alain Le-bail, Graziella Midelet-bourdinAbstract:The aim of this study was to investigate the impact of superchilling (-2 degrees C) on the evolution of Listeria monocytogenes and organoleptic characteristics of cold-smoked salmon samples. An Hadamard matrix experimental design was carried out on artificially inoculated samples stored at +4 degrees C for 10 d and at +8 degrees C for 18 d to know the influence of four factors: salt content, strain, cold stiffening and superchilling time, on the level of L.monocytogenes in cold-smoked salmon. The growth of L. monocytogenes in naturally contaminated cold-smoked salmon and the organoleptic properties were investigated under superchilling conditions. Superchilling (-2 degrees C for 28 d) had a limited impact on some of the organoleptic properties but the level of L. monocytogenes at the end of the shelf-life (4 degrees C for 10 d and 8 degrees C for 18 d) could exceed the Microbiological Criterion set by the European legislation. (C) 2009 Elsevier Ltd and IIR. All rights reserved.
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the effects of superchilled storage at 2 c on the Microbiological and organoleptic properties of cold smoked salmon before retail display
International Journal of Refrigeration-revue Internationale Du Froid, 2009Co-Authors: A. Beaufort, Mireille Cardinal, Alain Lebail, Graziella MideletbourdinAbstract:The aim of this study was to investigate the impact of superchilling (-2 degrees C) on the evolution of Listeria monocytogenes and organoleptic characteristics of cold-smoked salmon samples. An Hadamard matrix experimental design was carried out on artificially inoculated samples stored at +4 degrees C for 10 d and at +8 degrees C for 18 d to know the influence of four factors: salt content, strain, cold stiffening and superchilling time, on the level of L.monocytogenes in cold-smoked salmon. The growth of L. monocytogenes in naturally contaminated cold-smoked salmon and the organoleptic properties were investigated under superchilling conditions. Superchilling (-2 degrees C for 28 d) had a limited impact on some of the organoleptic properties but the level of L. monocytogenes at the end of the shelf-life (4 degrees C for 10 d and 8 degrees C for 18 d) could exceed the Microbiological Criterion set by the European legislation. (C) 2009 Elsevier Ltd and IIR. All rights reserved.
