Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

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Quantifying potential sources of surface water contamination with Campylobacter jejuni and Campylobacter coli
Mughini-Gras, Lapo ; Penny, Christian ; Ragimbeau, Catherine ; Schets, Franciska M. ; Blaak, Hetty ; Duim, Birgitta ; Wagenaar, Jaap A. ; Boer, Albert de; Cauchie, Henry-Michel ; Mossong, Joel ; Pelt, Wilfrid Van - \ 2016
Water Research 101 (2016). - ISSN 0043-1354 - p. 36 - 45.
campylobacter - surface water - water quality - pollution - water pollution - microbiology - wild birds - poultry - campylobacter jejuni - campylobacter coli - netherlands - luxembourg - oppervlaktewater - waterkwaliteit - verontreiniging - waterverontreiniging - microbiologie - wilde vogels - pluimvee - nederland - luxemburg
Campylobacter is the most common causative agent of human bacterial gastroenteritis and is frequently found in surface water, where it indicates recent contamination with animal faeces, sewage effluent, and agricultural run-off. The contribution of different animal reservoirs to surface water contamination with Campylobacter is largely unknown. In the Netherlands, the massive poultry culling to control the 2003 avian influenza epidemic coincided with a 44–50% reduction in human campylobacteriosis cases in the culling areas, suggesting substantial environment-mediated spread of poultry-borne Campylobacter. We inferred the origin of surface water Campylobacter jejuni and Campylobacter coli strains in Luxembourg and the Netherlands, as defined by multilocus sequence typing, by comparison to strains from poultry, pigs, ruminants, and wild birds, using the asymmetric island model for source attribution. Most Luxembourgish water strains were attributed to wild birds (61.0%), followed by poultry (18.8%), ruminants (15.9%), and pigs (4.3%); whereas the Dutch water strains were mainly attributed to poultry (51.7%), wild birds (37.3%), ruminants (9.8%), and pigs (1.2%). Attributions varied over seasons and surface water types, and geographical variation in the relative contribution of poultry correlated with the magnitude of poultry production at either the national or provincial level, suggesting that environmental dissemination of Campylobacter from poultry farms and slaughterhouses can be substantial in poultry-rich regions.
Quantification of transmission of foot-and-mouth disease virus caused by an environment contaminated with secretions and excretions from infected calves
Bravo De Rueda, C. ; Jong, M. de; Eblé, P.L. ; Dekker, A. - \ 2015
Veterinary Research 46 (2015). - ISSN 0928-4249
between-pen transmission - classical swine-fever - vaccinated pigs - actinobacillus-pleuropneumoniae - influenza-viruses - dairy-cows - inactivation - campylobacter - formaldehyde - populations
Foot-and-mouth disease virus (FMDV) infected animals can contaminate the environment with their secretions and excretions. To quantify the contribution of a contaminated environment to the transmission of FMDV, this study used calves that were not vaccinated and calves that were vaccinated 1 week prior to inoculation with the virus in direct and indirect contact experiments. In direct contact experiments, contact calves were exposed to inoculated calves in the same room. In indirect contact experiments, contact calves were housed in rooms that previously had held inoculated calves for three days (either from 0 to 3 or from 3 to 6 days post inoculation). Secretions and excretions from all calves were tested for the presence of FMDV by virus isolation; the results were used to quantify FMDV transmission. This was done using a generalized linear model based on a 2 route (2R, i.e. direct contact and environment) SIR model that included information on FMDV survival in the environment. The study shows that roughly 44% of transmission occurs via the environment, as indicated by the reproduction ratio ^R0 2R environment that equalled 2.0, whereas the sum of ^R0 2R contact and ^R0 2R environment equalled 4.6. Because vaccination 1 week prior to inoculation of the calves conferred protective immunity against FMDV infection, no transmission rate parameters could be estimated from the experiments with vaccinated calves. We conclude that a contaminated environment contributes considerably to the transmission of FMDV therefore that hygiene measures can play a crucial role in FMD control.
Small distances can keep bacteria at bay for days
Bunnik, B.A.D. van; Ssematimba, A. ; Hagenaars, T.H.J. ; Nodelijk, G. ; Haverkate, M.R. ; Bonten, M.J.M. ; Hayden, M.K. ; Weinstein, R.A. ; Bootsma, M.C.J. ; Jong, M. de - \ 2014
Proceedings of the National Academy of Sciences of the United States of America 111 (2014)9. - ISSN 0027-8424 - p. 3556 - 3560.
indirect transmission - mouth epidemic - foot - campylobacter - broilers - dynamics - impact - model - care - uk
Transmission of pathogens between spatially separated hosts, i.e., indirect transmission, is a commonly encountered phenomenon important for epidemic pathogen spread. The routes of indirect transmission often remain untraced, making it difficult to develop control strategies. Here we used a tailor-made design to study indirect transmission experimentally, using two different zoonotic bacteria in broilers. Previous experiments using a single bacterial species yielded a delay in the onset of transmission, which we hypothesized to result from the interplay between diffusive motion of infectious material and decay of infectivity in the environment. Indeed, a mathematical model of diffusive pathogen transfer predicts a delay in transmission that depends both on the distance between hosts and on the magnitude of the pathogen decay rate. Our experiments, carried out with two bacterial species with very different decay rates in the environment, confirm the difference in transmission delay predicted by the model. These results imply that for control of an infectious agent, the time between the distant exposure and the infection event is important. To illustrate how this can work we analyzed data observed on the spread of vancomycin-resistant Enterococcus in an intensive care unit. Indeed, a delayed vancomycin-resistant Enterococcus transmission component was identified in these data, and this component disappeared in a study period in which the environment was thoroughly cleaned. Therefore, we suggest that the impact of control strategies against indirect transmission can be assessed using our model by estimating the control measures’ effects on the diffusion coefficient and the pathogen decay rate.
ODoSE: A Webserver for Genome-Wide Calculation of Adaptive Divergence in Prokaryotes
Vos, M. ; Beek, T.A.H. ; Driel, M.A. van; Huynen, M.A. ; Eyre-Walker, A. ; Passel, M.W.J. van - \ 2013
PLoS ONE 8 (2013)5. - ISSN 1932-6203
positive selection - evolution - recombination - drosophila - campylobacter
Quantifying patterns of adaptive divergence between taxa is a major goal in the comparative and evolutionary study of prokaryote genomes. When applied appropriately, the McDonald-Kreitman (MK) test is a powerful test of selection based on the relative frequency of non-synonymous and synonymous substitutions between species compared to non-synonymous and synonymous polymorphisms within species. The webserver ODoSE (Ortholog Direction of Selection Engine) allows the calculation of a novel extension of the MK test, the Direction of Selection (DoS) statistic, as well as the calculation of a weighted-average Neutrality Index (NI) statistic for the entire core genome, allowing for systematic analysis of the evolutionary forces shaping core genome divergence in prokaryotes. ODoSE is hosted in a Galaxy environment, which makes it easy to use and amenable to customization and is freely available at www.odose.nl
De invloed van watervogels op de bacteriologische zwemwaterkwaliteit
Lange, H.J. de; Lammertsma, D.R. ; Keizer-Vlek, H.E. - \ 2013
Amersfoort : Stowa (Rapport / STOWA 2013-12) - ISBN 9789057735912 - 42
zwemwater - waterkwaliteit - watervogels - waterplanten - bacteriologie - escherichia coli - campylobacter - fecale flora - oppervlaktewaterkwaliteit - openluchtrecreatie - nederland - swimming water - water quality - waterfowl - aquatic plants - bacteriology - faecal flora - surface water quality - outdoor recreation - netherlands
Dit rapport beschrijft de invloed van watervogels op de bacteriologische zwemwaterkwaliteit van 20 zwemplassen. Hiervoor is in de 20 zwemplassen veldonderzoek verricht naar relaties tussen aantallen en soorten watervogels, waterplanten, helderheid en concentraties fecale bacteriën. De concentratie zwevend stof en de begroeiing met waterplanten zijn beide factoren die de concentratie van fecale bacteriën beïnvloeden. Beheer gericht op het verbeteren van het doorzicht, verminderen van zwevend stof en bevorderen van waterplanten zal de overleving van fecale bacteriën verkorten. Dergelijke maatregelen zullen de zwemwaterkwaliteit verbeteren en hebben ook een positief effect op de ecologische kwaliteit van het water.
Microbial performance of food safety management systems implemented in the lamb production chain
Oses, S.M. ; Luning, P.A. ; Jacxsens, L. ; Santillana, S. ; Jaime, I. ; Rovira, J. - \ 2012
Journal of Food Protection 75 (2012)1. - ISSN 0362-028X - p. 95 - 103.
escherichia-coli o157 - beef processing plants - aerobic-bacteria - red meat - carcasses - prevalence - contamination - enterobacteriaceae - campylobacter - salmonella
The actual microbial status of the lamb production chain at three slaughterhouses, one processing plant, and five butcher shops selling whole or cut lamb carcasses to consumers was assessed with a previously developed microbial assessment scheme. All studied establishments had a food safety management system (FSMS) that was implemented according to legislative requirements. Microbial safety level profiles were constructed for each establishment and provided clear indications of which pathogens, hygiene indicators, or utility parameters required attention to improve the performance of the microbiological control protocols of the implemented FSMS. The highest contamination was found in the slaughterhouses in samples taken from the meat products (aerobic mesophilic plate counts [AMPs] of 3.40 to 6.63 log CFU/cm(2) and Enterobacteriaceae counts of 1.00 to 4.62 log CFU/cm(2)), contact surfaces (AMPs of 2.44 to 8.92 log CFU/cm(2)), and operators' hands and/or gloves (AMPs of 2.84 to 8.09 log CFU/cm(2)), especially after hide removal and evisceration. The microbial assessment scheme is a useful tool for providing insight into the actual microbiological results achieved with an FSMS implemented in establishments at various stages along the lamb production chain.
Fecale bacteriën in de plassen van het park van Luna, Heerhugowaard : een verkenning van oorzaken en oplossingen
Kleijn, D. ; Meerburg, B.G. ; Harmsen, J. - \ 2010
Wageningen : Alterra (Alterra-Rapport 2057) - 41
escherichia coli - campylobacter - darmmicro-organismen - waterverontreiniging - watervogels - feces - waterkwaliteit - recreatiegebieden - natuurbescherming - voorstedelijke woonwijken - nederland - oppervlaktewaterkwaliteit - zwemwater - kop van noord-holland - intestinal microorganisms - water pollution - waterfowl - faeces - water quality - amenity and recreation areas - nature conservation - suburban areas - netherlands - surface water quality - swimming water
In 2003 is begonnen met de aanleg van de woonwijk Park van Luna, net ten zuiden van Heerhugowaard. Deze woonwijk bestaat uit 70 ha met woningen, 70 ha met de functie recreatie en 70 ha met de functie ecologisch groen. Een belangrijk deel van het gebied bestaat uit water, een deel hiervan is zwemwater. De zwemwaterkwaliteit is echter slecht, vooral door het voorkomen van te hoge concentraties fecale bacteriën (o.a. E. coli en intestinale enterococcen). Een eerste verkenning van de beschikbare gegevens leerde dat nog onvoldoende bekend is waar de problemen exact vandaan komen en wanneer deze zich vooral voordoen. De meest aannemelijke verklaring voor de hoge concentraties fecale bacteriën lijkt het voorkomen van watervogels te zijn, maar onduidelijk is wat de rol is van de verschillende soorten watervogels en waar en wanneer de problemen zich vooral voordoen. Ook is onduidelijk of fecale bacteriën over enige afstand getransporteerd kunnen worden in de waterstroom. Deze literatuurstudie heeft als doel een antwoord te geven op deze vragen.
Schonere kip dankzij fagen
Bergen, M.A.P. van - \ 2009
Kennis Online 6 (2009)aug. - p. 10 - 10.
bacteriologie - bacteriofagen - campylobacter - salmonella - pluimveehouderij - pluimvee - bacteriology - bacteriophages - poultry farming - poultry
Antibiotica zijn door de toename van resistenties geen wondermiddel meer. Omdat er alternatieven moeten komen voor de bestrijding van schadelijke bacteriën, doet het Centraal Veterinair Instituut (CVI) onderzoek naar een, in de westerse wereld, in de vergetelheid geraakte methode met fagen. De eerste testen bij campylobacter en salmonella zijn hoopgevend
Toename Salmonella en Campylobacter bij slacht : Campylobacter in pluimveesector constant, Salmonella sterk gedaald
Fels-Klerx, H.J. van der; Asselt, E.D. van - \ 2009
Voedingsmiddelentechnologie 42 (2009)3. - ISSN 0042-7934 - p. 18 - 19.
salmonella - campylobacter - pluimveehouderij - slachtdieren - voedselbesmetting - poultry farming - meat animals - food contamination
In vrijwel alle schakels van de pluimveevleesketen is de besmetting met Salmonella in de periode van 2002 tot 2005 gedaald. Campylobacter werd in diezelfde periode juist vaker in slachthuizen aangetroffen. Tijdens het slachten nam de besmetting met beide pathogenen toe, voor Salmonella gold dit vooral bij grotere slachterijen. Beter inzicht in het verloop van besmettingen in de keten kan helpen om interventiemaatregelen gerichter in te zetten.
Nieuw vaccin tegen campylobacter
Wagenaar, J.A. - \ 2008
Kennis Online 5 (2008)dec. - p. 9 - 9.
campylobacter - vaccins - kippen - voedselveiligheid - vaccines - fowls - food safety
Het vaccin dat de kip moet beschermen tegen de bacterie Campylobacter werkt in het laboratorium. Dat wil bacterioloog Jaap Wagenaar wel kwijt. Wanneer het er komt en zelfs of het er komt, daarover laat Wagenaar zich niet uit. "Het is een hele klus om het immuunsysteem van kippen effectief op te laten treden tegen Campylobacter", zegt Wagenaar die werkt bij het CVI en hoogleraar is aan de Universiteit Utrecht. "Geen van de vaccins die onderzoekers tot nu hebben uitgeprobeerd werken"
Application of a transmission model to estimate Performance Objectives for Salmonella in the broiler supply chain
Fels-Klerx, H.J. van der; Tromp, S.O. ; Rijgersberg, H. ; Asselt, E.D. van - \ 2008
International Journal of Food Microbiology 128 (2008)1. - ISSN 0168-1605 - p. 22 - 27.
quantitative risk-assessment - control program - poultry meat - campylobacter - impact
The aim of the present study was to demonstrate how Performance Objectives (POs) for Salmonella at various points in the broiler supply chain can be estimated, starting from pre-set levels of the PO in finished products. The estimations were performed using an analytical transmission model, based on prevalence data collected throughout the chain in The Netherlands. In the baseline (current) situation, the end PO was set at 2.5% of the finished products (at end of processing) being contaminated with Salmonella. Scenario analyses were performed by reducing this baseline end PO to 1.5% and 0.5%. The results showed the end PO could be reduced by spreading the POs over the various stages of the broiler supply chain. Sensitivity analyses were performed by changing the values of the model parameters. Results indicated that, in general, decreasing Salmonella contamination between points in the chain is more effective in reducing the baseline PO than increasing the reduction of the pathogen, implying contamination should be prevented rather than treated. Application of both approaches at the same time showed to be most effective in reducing the end PO, especially at the abattoir and during processing. The modelling approach of this study proved to be useful to estimate the implications for preceding stages of the chain by setting a PO at the end of the chain as well as to evaluate the effectiveness of potential interventions in reducing the end PO. The model estimations may support policy-makers in their decision-making process with regard to microbiological food safety.
Prevalence of Salmonella in the broiler supply chain in the Netherlands
Fels-Klerx, H.J. van der; Jacobs-Reitsma, W.F. ; Brakel, R. van; Voet, H. van der; Asselt, E.D. van - \ 2008
Journal of Food Protection 71 (2008)10. - ISSN 0362-028X - p. 1974 - 1980.
surveillance - meat - campylobacter - chicken - raw
This article presents detailed information on Salmonella prevalence throughout the broiler supply chain in The Netherlands, based on results from a national monitoring program. Data were collected during the period 2002 through 2005 and from six sampling points in the chain, covering hatchery up to and including processing. Trends in Salmonella prevalence over years and seasons were analyzed as well as the effect of slaughterhouse capacity on these trends. In addition, correlations between the occurrence of Salmonella at the various sampling points were calculated. The results showed a decreasing trend of Salmonella prevalence from 2002 through 2005 at all sampling points. A seasonal effect on the occurrence of Salmonella was found at the broiler farm, with a higher prevalence during the third and fourth quarter of the year (July through December). The higher the capacity of the slaughterhouse, the lower Salmonella prevalence on arrival at the slaughterhouse and the higher the prevalence at the end of slaughter and the end of processing. The detailed insights obtained in this study could be used to focus future field and experimental research on the prevention and control of Salmonella in the broiler supply chain. Results presented could also be used in risk assessment studies
Contaminants and microorganisms in Dutch organic food products: a comparison with conventional products
Hoogenboom, L.A.P. ; Bokhorst, J.G. ; Northolt, M.D. ; Vijver, L.P.L. van de; Broex, N.J.G. ; Mevius, D.J. - \ 2008
Food Additives and Contaminants 25 (2008)10. - ISSN 0265-203X - p. 1195 - 1207.
solid-phase extraction - bound metabolites - eggs - residues - wheat - campylobacter - mycotoxins - depletion - quality - tissues
Organic products were analysed for the presence of contaminants, microorganisms and antibiotic resistance and compared with those from conventional products. No differences were observed in the Fusarium toxins deoxynivalenol and zearalenone in organic and conventional wheat, during both a dry period and a very wet period which promoted the production of these toxins. Nitrate levels in head lettuce produced organically in the open field were much lower than those in conventional products. In iceberg lettuce and head lettuce from the greenhouse, no differences were detected. Organically produced carrots contained higher nitrate levels than conventional products. Both organic and conventional products contained no residues of non-polar pesticides above the legal limits, although some were detected in conventional lettuce. Organic products contained no elevated levels of heavy metals. Salmonella was detected in 30% of pig faeces samples obtained from 30 organic farms, similar to the incidence at conventional farms. At farms that switched to organic production more then 6 years ago no Salmonella was detected, with the exception of one stable with young pigs recently purchased from another farm. No Salmonella was detected in faeces at the nine farms with organic broilers, and at one out of ten farms with laying hens. This is comparable with conventional farms where the incidence for Salmonella lies around 10%. Campylobacter was detected in faeces at all organic broiler farms, being much higher than at conventional farms. One of the most remarkable results was the fact that faeces from organic pigs and broilers showed a much lower incidence of antibiotic resistant bacteria, except for Campylobacter in broilers. It is concluded that the organic products investigated scored as equally well as conventional products with regard to food safety and at the same time show some promising features with respect to antibiotic resistance.
The Ethics of Rodent Control
Meerburg, B.G. ; Brom, F.W.A. ; Kijlstra, A. - \ 2008
Pest Management Science 64 (2008)12. - ISSN 1526-498X - p. 1205 - 1211.
warfarin resistance - reductase-activity - wild rodents - rat - salmonella - mammals - farms - liver - campylobacter - transmission
Because western societies generally see animals as objects of moral concern, demands have been made on the way they are treated, e.g. during animal experimentation. In the case of rodent pests, however, inhumane control methods are often applied. This inconsistency in the human-animal relationship requires clarification. This paper analyses the criteria that must be met when judging the use of animals during experiments, and investigates whether these can be applied in rodent control. This is important, because, until now, animal welfare has been less of an issue in pest control: effectiveness, hygiene and cost efficiency have been leading principles. Two options are available to solve the inconsistency: the first is to abandon the criteria used in animal experimentation; the second is to apply these criteria to both animal experimentation and rodent control. This latter option implies that rodent control methods should not lead to intense pain or discomfort, and any discomfort should have a short duration and should allow escaped rodents to lead a natural life. Adherence to this option will, however, require a shift in the design of rodent control methods: effectiveness will no longer be the leading principle. It will have to share its position with animal welfare and humaneness.
Food Safety in the Domestic Environment: The Effect of Consumer Risk Information on Human Disease Risks
Nauta, M.J. ; Fischer, A.R.H. ; Asselt, E.D. van; Jong, A.E.I. de; Frewer, L.J. ; Jonge, R. de - \ 2008
Risk Analysis 28 (2008)1. - ISSN 0272-4332 - p. 179 - 192.
campylobacter - model - gastroenteritis - meat - fear
The improvement of food safety in the domestic environment requires a transdisciplinary approach, involving interaction between both the social and natural sciences. This approach is applied in a study on risks associated with Campylobacter on broiler meat. First, some web-based information interventions were designed and tested on participant motivation and intentions to cook more safely. Based on these self-reported measures, the intervention supported by the emotion "disgust" was selected as the most promising information intervention. Its effect on microbial cross-contamination was tested by recruiting a set of participants who prepared a salad with chicken breast fillet carrying a known amount of tracer bacteria. The amount of tracer that could be recovered from the salad revealed the transfer and survival of Campylobacter and was used as a measure of hygiene. This was introduced into an existing risk model on Campylobacter in the Netherlands to assess the effect of the information intervention both at the level of exposure and the level of human disease risk. We showed that the information intervention supported by the emotion "disgust" alone had no measurable effect on the health risk. However, when a behavioral cue was embedded within the instruction for the salad preparation, the risk decreased sharply. It is shown that a transdisciplinary approach, involving research on risk perception, microbiology, and risk assessment, is successful in evaluating the efficacy of an information intervention in terms of human health risks. The approach offers a novel tool for science-based risk management in the area of food safety.
Opzetten van ringonderzoeken voor Campylobacter toepasbaar binnen het monitoringsonderzoek in de vleeskuikenhouderij
Hulst-van Arkel, M.C. van der; Jacobs-Reitsma, W.F. ; Bergen, M.A.P. van; Koene, M.G.J. - \ 2007
Lelystad : Animal Sciences Group (Rapport / Animal Sciences Group ASG07-100360) - 41
campylobacter - pluimveehouderij - pluimvee - slachtdieren - monsters - besmetting - monitoring - kwaliteitscontroles - poultry farming - poultry - meat animals - samples - contamination - quality controls
Voor het Actieplan 2000+ van de Productschappen Vee, Vlees en Eieren (PVE) zijn ruim 20 laboratoria door PVE erkend om monsters afkomstig van pluimvee (mest en borstvel) te onderzoeken op Campylobacter. Voor het verkrijgen en behouden van deze erkenning moeten de laboratoria o.a. deelnemen aan relevante ringonderzoeken. Voor Campylobacter bestond tot op heden geen ringonderzoek waarbij de matrices mest en borstvel werden aangeboden. In dit onderzoek is een ringonderzoek ontwikkeld, waarbij naast reinculturen ook mest en borstvel met en zonder Campylobacter worden aangeboden. Hiervoor is onderzoek verricht naar de beste manier om de monstermaterialen te besmetten in relatie tot het noodzakelijke bewaren en in verband met transport. Ook de wijze van transport, ontwerpen van formulieren en verwerking van resultaten is in het onderzoek meegenomen
Microbial challenges of poultry meat production
Bolder, N.M. - \ 2007
Worlds Poultry Science Journal 63 (2007)3. - ISSN 0043-9339 - p. 401 - 411.
broiler carcasses - salmonella-typhimurium - cross-contamination - modified atmosphere - escherichia-coli - campylobacter - hygiene - water - withdrawal - transport
Food safety and shelf-life are both important microbial concerns in relation to broiler meat production. Focus is mainly placed on the absence or control of potentially pathogenic microbes such as Salmonella and Campylobacter but, from commercial point of view, other spoilage bacteria also play a role. Regarding food safety, the primary target should be the production of pathogen-free live animals, thereby allowing slaughter plants to keep the processing line free of those micro-organisms. Pathogen-free feed is fundamental in obtaining such conditions, as is the Good Hygienic Practice in farming, including grand parent stock (GPS), parent stock (PS) and hatcheries. Interventions in the slaughter plant cannot always completely remove pathogens. However there are some measures of control available, including separation of flocks, carcass decontamination and implementing a balanced and operational HACCP system. Shelf-life is closely linked to food safety during processing. The developments towards in-line processing, including chilling, portioning and deboning, allows optimal control. It minimizes processing time and product to product contact, and thus increases shelf-life and limits cross contamination. Refrigeration conditions are very important and an interruption of the refrigeration chain can accelerate microbial growth. Modified atmosphere packaging (MAP) may contribute in controlling the undesired growth of spoilage organisms, and can play a role in food safety as well. The consumer needs to be educated in how to deal with food of animal origin that cannot be produced in an entirely sterile environment, in order to ensure shelf-life and correct preparation and use.
Risico inschatting alternatieve huisvesting vleeskuikens = Risk assessment alternative housing systems for broilers
Lourens, A. ; Hagenaars, T.H.J. ; Bolder, N.M. ; Engel, B. - \ 2007
Lelystad : Animal Sciences Group (Rapport / Wageningen UR, Animal Sciences Group 27) - 41
huisvesting van kippen - pluimveehokken - vleeskuikens - risicofactoren - salmonella - campylobacter - transmissie - methodologie - uitloop - vergelijkend onderzoek - chicken housing - poultry housing - broilers - risk factors - transmission - methodology - outdoor run - comparative research
Het doel van dit onderzoek was inzicht te krijgen in de handhavingmechanismen van zoönosen in alternatieve huisvestingsystemen voor vleeskuikens waarbij de kuikens toegang hebben tot een overdekte uitloop
Kip, consument en Campylobacter: infectieziektebestrijding met consumentenvoorlichting
Jonge, R. de; Fischer, A.R.H. ; Nauta, M.J. - \ 2007
Infectieziekten bulletin 18 (2007)9. - ISSN 0925-711X - p. 314 - 318.
pluimveevlees - kippenvlees - voorlichting - consumenteneducatie - consumenteninformatie - campylobacter - voedselbesmetting - voedselveiligheid - voedselhygiëne - voedselbereiding thuis - poultry meat - chicken meat - extension - consumer education - consumer information - food contamination - food safety - food hygiene - home food preparation
In the Netherlands, Campylobacter is an important bacterial causative agent of gastroenteritis, with poultry as an important source. Measures aiming to reduce the number of Campylobacter on poultry meat however cannot guarantee the production of fresh meat free of Campylobacter. To minimize the risk, the authors developed and studied the effect of information interventions in the domestic environment, focusing on the prevention of microbial cross contamination
Kan voorlichting aantal zieken door Campylobacter omlaag brengen?
Nauta, M. ; Jonge, R. de; Fischer, A.R.H. - \ 2007
Voeding Nu 9 (2007)6. - ISSN 1389-7608 - p. 20 - 22.
campylobacter - kippenvlees - hygiëne - microbiële besmetting - voedselbesmetting - voorlichting - consumenteninformatie - methodologie - chicken meat - hygiene - microbial contamination - food contamination - extension - consumer information - methodology
Campylobacter en kip: het blijft een gevreesde combinatie. Toch kan goede hygiëne in de keuken bij consumenten thuis infectie met deze bacterie voorkomen. Om mensen zover te krijgen lijkt voorlichting nodig, die erop gericht is om kruisbesmetting van rauw kippenvlees naar ander voedsel te voorkomen. Maar werkt die eigenlijk wel? Recent onderzoek van het RIVM en Wageningen Universiteit laat zien dat er mogelijkheden zijn
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