Straver, J.M., Janssen, A.F.W., Linnemann, A.R., Beumer, R.R., Zwietering, M.H.
This study aimed to characterize the number of Salmonella on chicken breast filet at the retail level and to evaluate if this number affects the risk of salmonellosis. From October to December 2005,...
Shiga toxin-producing Escherichia coli isolated from patients with diarrhoea in Bangladesh (2007)
Islam, M.A., Heuvelink, A.E., Sturm, P.D., Beumer, R.R., Zwietering, M.H., ...
The prevalence of Shiga toxin-producing Escherichia coli (STEC) and its characteristics were determined among hospitalized patients with diarrhoea and children with diarrhoea in an urban slum...
Investigation of the Presence of Campylobacter and Salmonella in Insectivorous Bats (2007)
Hazeleger, W.C., Lina, P.H.C., Jacobs-Reitsma, W.F., Beumer, R.R.
Hazeleger, W.C., Dalvoorde, M., Beumer, R.R.
The cell morphology of Salmonella enteritidis and Listeria monocytogenes after the application of stress was examined. Cells were stressed by plating the bacteria on Tryptone Soya Agar (TSA) plates,...
Kieboom, J., Kusumaningrum, H.D., Tempelaars, M.H., Hazeleger, W.C., Abee, T., Beumer, R.R.
Growing microorganisms on dry surfaces, which results in exposure to low water activity (aw), may change their normal morphology and physiological activity. In this study, the morphological changes...
Modeling growth of Clostridium perfringens in pea soup during cooling (2005)
Beumer, R.R., Zwietering, M.H.
Clostridium perfringens is a pathogen that mainly causes food poisoning outbreaks when large quantities of food are prepared. Therefore, a model was developed to predict the effect of different...
Growth and survival of Arcobacter butzleri (2005)
Hazeleger, W.C., Nobmann Navas, P., Nijssen, W.H.P., Beumer, R.R.
Kuiper, M.W., Wullings, B.A., Akkermans, A.D.L., Beumer, R.R.
The need for protozoa for the proliferation of Legionella pneumophila in aquatic habitats is still not fully understood and is even questioned by some investigators. This study shows the in vivo...
A new protocol for the detection of Enterobacter sakazakii applied to environmental samples (2004)
Kandhai, M.C., Reij, M.W., Guillaume-Gentil, O., Beumer, R.R.
Disinfection and the prevention of infectious disease (2004)
Bloomfield, S.F., Beumer, R.R., Exner, M., Fara, G.M., Scott, E., Nath, K.J.
Kitchen hygiene in daily life (2003)
Beumer, R.R., Kusumaningrum, H.D.
More and more data are available indicating that numerous (infectious) diseases are related to the home environment. Airborne microorganisms (bacteria, fungi), mites (in sheets or carpets), and...
Comparison of media for enumeration of Clostridium perfringens from foods (2003)
Eijhusen, G.P., Grand, M., Johansson, T., Kärkkäinen, T., ...
Many media have been developed to enumerate Clostridium perfringens from foods. In this study, six media [iron sulfite (IS) agar, tryptose sulfite cycloserine (TSC) agar, Shahidi Ferguson perfringens...
Estimating the probability of recontamination via the air using Monte Carlo simulations (2003)
Beumer, R.R., Zwietering, M.H., Boom, R.M.
Recontamination of food products can cause foodborne illnesses or spoilage of foods. It is therefore useful to quantify this recontamination so that it can be incorporated in microbiological risk...
Survival of foodborne pathogens on stainless steel surfaces and cross-contamination to foods (2003)
Kusumaningrum, H.D., Riboldi, G., Hazeleger, W.C., Beumer, R.R.
The retention of bacteria on food contact surfaces increases the risk of cross-contamination of these microorganisms to food. The risk has been considered to be lowered when the surfaces are dry,...
Kusumaningrum, H.D., Paltinaite, R., Koomen, A.J., Hazeleger, W.C., Rombouts, F.M., Beumer, R.R.
Effective cleaning and sanitizing of food preparation sites is important because pathogens are readily spread to food contact surfaces after preparation of contaminated raw products. Tolerance of...
De kwalijke rol van kevers : overbrenging Salmonella en Campylobacter (2003)
Bolder, N.M., Jacobs-Reitsma, W.F., Wagenaar, J.A., Hazeleger, W.C., Beumer, R.R.
De vraatzucht van kevers aan isolatiemateriaal in stallen valt wel mee. Inmiddels is echter bekend dat piepschuimkevers verantwoordelijk kunnen zijn voor de overdracht van verschillende...
Listeria monocytogenes: diagnostic problems (2003)
The first isolation methods for the detection of Listeria spp. were generally based on the direct culture of samples on simple agar media, but isolation of the pathogenic Listeria monocytogenes was...
A biofilm model for flowing systems in the food industry (2003)
Vernooij, W.W., Reij, M.W., Zwietering, M.H., Beumer, R.R., ...
When bacteria attach to the walls of pipelines, they can form biofilms, which can cause the recontamination of food products. In order to quantify such recontamination, a one-dimensional biofilm...
Guidelines for prevention of infection and cross infection in the domestic environment (2002)
Beumer, R.R., Bloomfield, S., Exner, M., Fara, G.M., Scott, E., Kumar Jyoti Nath
Kusumaningrum, H.D., Rombouts, F.M., Beumer, R.R.
In response to increasing concern about home hygiene, the use of antibacterial products to reduce microorganisms in kitchen sponges and cleaning cloths is strongly promoted by some producers of...
Optimizing sporulation of Clostridium perfringens (2002)
Many sporulation media have been developed for Clostridium perfringens, but none stimulates sporulation for all strains. The aim of our experiments was to develop a sporulation method using Duncan...
Campylobacter jejuni : survival on dry surfaces and change in morphology in salty media (2002)
Kusumaningrum, H.D., Barreveld, M., Hazeleger, W.C., Beumer, R.R.
A consumer-oriented classification system for home meal replacements (2001)
Costa, A.I.A., Dekker, M., Beumer, R.R., Rombouts, F.M., Jongen, W.M.F.
This paper introduces a new definition and classification system for home meal replacements (HMR), based on convenience attributes as viewed by consumers. An overview of other food classifications,...
A quantitative analysis of convenience-related food consumption in the Netherlands (2001)
Costa, A.I.A., Dekker, M., Beumer, R.R., Rombouts, F.M., Jongen, W.M.F.
Microbiologie van voedingsmiddelen, methoden, principes en criteria, tweede druk (2001)
Dijk, R., Beumer, R.R., Hummelen, T., Brinkman, E., Debevere, J., ...
A quantitative analysis of convenience-related food consumption in The Netherlands (2001)
Costa, A.I.A., Dekker, M., Beumer, R.R., Rombouts, F.M., Jongen, W.M.F.
Microbial resistance and biocides : A review by the International Forum on Home Hygiene (IFH) (2000)
Beumer, R.R., Bloomfield, S.F., Exner, M., Fara, G.M., Nath, K.J., Scott, E.
Beumer, R.R., Zwietering, M.H.
This paper describes a system for the microbiological quantitative risk assessment for food products and their production processes. The system applies a stepwise risk assessment, allowing the main...
Microbiologie van Voedingsmiddelen : Methoden, principes en criteria (1999)
Dijk, R., Beumer, R.R., Bosboom, M.M.M., Brinkman, E., Debevere, J., ...