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.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Welzijn dierentuindieren : Zoeken naar uitdaging - Dierenwelzijn in beeld
Beerda, B. ; Borg, J.A.M. van der - \ 2016
Dierenwelzijnsweb
dierenwelzijn - dierentuindieren - diergezondheid - diergedrag - diervoeding - huisvesting, dieren - animal welfare - zoo animals - animal health - animal behaviour - animal nutrition - animal housing
Moderne dierentuinen bouwen dierverblijven die zoveel mogelijk gebaseerd zijn op soortspecifieke behoeften van dieren. Ze stemmen de verzorging af op natuurlijk gedrag. De complexiteit en uitdaging van de natuur is helaas lastig te benaderen, en afhankelijk van de soort vertaalt dit zich in een risico op verminderd welzijn.
Interplay between gut microbiota and antibiotics
Jesus Bello Gonzalez, Teresita de - \ 2016
Wageningen University. Promotor(en): Hauke Smidt, co-promotor(en): M.W.J. van Passel. - Wageningen : Wageningen University - ISBN 9789463430043 - 293
antibiotics - intestinal microorganisms - aminoglycoside antibiotics - enterococcus - interactions - zoo animals - man - patients - dna sequencing - polymerase chain reaction - antibiotica - darmmicro-organismen - aminoglycoside antibiotica - enterococcus - interacties - dierentuindieren - mens - patiënten - dna-sequencing - polymerase-kettingreactie

The human body is colonized by a vast number of microorganisms collectively defined as the microbiota. In the gut, the microbiota has important roles in health and disease, and can serve as a host of antibiotic resistance genes. Disturbances in the ecological balance, e.g. by antibiotics, can affect the diversity and dynamics of the microbiota. The extent of the disturbance induced by antibiotics is influenced by, among other factors, the class of antibiotic, the dose, and administration route. One of the most common consequences of excessive antibiotic use is the emergence of antibiotic resistant bacteria and the dissemination of the corresponding resistance genes to other microbial inhabitants of the gut community, in addition to affecting the colonization resistance and promoting the overgrowth of pathogens. These effects are particularly relevant for Intensive Care Unit (ICU) patients, which are frequently exposed to a high risk of hospital-acquired infections associated with antibiotic resistant bacteria.

Due to the important roles that members of the gut microbiota play in the host, including their role as potential hubs for the dissemination of antibiotic resistance, recent research has focused on determining the composition and function of gut microorganisms and the antibiotic resistance genes associated with them.

The objectives of the research described in this thesis were to study the diversity and dynamics of the gut microbiota and resistome in ICU patients receiving antibiotic prophylactic therapy, and to assess the colonization dynamics with antibiotic resistant bacteria focusing on the commensal microbiota as a reservoir of antibiotic resistance genes by using culture dependent and independent techniques. Furthermore, the genetic background involved in the subsistence phenotype was investigated to disentangle the links between resistance and subsistence.

Bacteria harbor antibiotic resistance genes that participate in a range of processes such as resisting the toxic effects of antibiotics, but could also aid in the utilization of antibiotics as sole carbon source, referred to as antibiotic subsistence phenotype. In chapter 2, the potential of gut bacteria from healthy human volunteers and zoo animals to subsist on antibiotics was investigated.

Various gut isolates of Escherichia coli and Cellulosimicrobium spp. displayed the subsistence phenotype, mainly with aminoglycosides. Although no antibiotic degradation could be detected, the number of colony forming units increased during growth in medium with only the antibiotic as a carbon source. By using different approaches to study the aminoglycoside subsistence phenotype, we observed that laboratory strains carrying the aminoglycoside 3’phosphotransferase II gene also displayed the subsistence phenotype on aminoglycosides and that glycosyl-hydrolases seem to be involved in the subsistence phenotype. As the zoo animals for which the subsistence phenotype was investigated also included a number of non-human primates, the applicability of Human Intestinal Tract Chip (HITChip) to study the gut microbiota composition of these animals was assessed, including a comparison with healthy human volunteers (Chapter 3). It was concluded that the HITChip can be successfully applied to the gut microbiota of closely related hominids, and the microbiota dynamics can therefore be quickly assessed by the HITChip.

In Chapter 4, a combination of 16S rRNA phylogenetic profiling using the HITChip and metagenomics sequencing was implemented on samples from a single ICU hospitalized patient that received antibiotic prophylactic therapy (Selective Digestive Decontamination - SDD). The different approaches showed a highly dynamic microbiota composition over time and the prevalence of aminoglycoside resistance genes harbored by a member of the commensal anaerobic microbiota, highlighting the role of the commensal microbiota as a reservoir of antibiotic resistance genes. As an extension of this study (Chapter 5), 11 ICU patients receiving SDD were followed using 10 healthy individuals as a control group to compare the diversity and dynamics of the gut microbiota and resistome by HITChip and nanolitre-scale quantitative PCRs, respectively. The microbial diversity of the healthy individuals was higher compared to ICU patients, and it was less dynamic compared to ICU patients under antibiotic treatment. Likewise, the levels of antibiotic resistance genes increased in ICU patients compared to healthy individuals, indicating that during ICU hospitalization and the SDD, gut microbiota diversity and dynamics are profoundly affected, including the selection of antibiotic resistance in anaerobic commensal bacteria.

This was further expanded in an extensive study focusing on colonization dynamics with antibiotic resistant bacteria as described in Chapter 6. This was performed in the same group of ICU-hospitalized patients receiving SDD therapy and showed that by using a range of culture media and selective conditions a variety of taxonomic groups could be isolated, including aerobic and anaerobic antibiotic resistant bacteria. The overall composition of the faecal microbiota detected by HITChip indicated mainly a decrease of Enterobacteriaceae and an increase of the enterococcal population. Since critically ill patients are susceptible to hospital-acquired infections and the control of the emergence of antibiotic resistance is crucial to improve therapeutic outcomes, an extended analysis of the Enterococcus colonization dynamics in this group of patients by cultivation and phenotypic and genotypic characterization of the isolates provided new information about carriage of antibiotic resistance and virulence factor encoding genes (Chapter 7). It also highlighted the opportunity for the exchange of resistance and virulence genes, which could increase the risk of acquiring nosocomial infections.

Next, chapter 8 described the implementation of high-throughput cultivation-based screening using the Microdish platform combined with high-throughput sequencing (MiSeq) using faecal samples from ICU patients receiving SDD. This allowed for the recovery of previously uncultivable bacteria, including a pure culture of a close relative of Sellimonas intestinalis BR72T that was isolated from media containing tobramycin, cefotaxime and polymyxin E. This strain could therefore represent a potential antibiotic resistance reservoir.

In conclusion, this thesis provides broad insight into the diversity and dynamics of the gut microbiota and resistome in ICU hospitalized patients receiving SDD therapy as well as the dynamics of colonization with antibiotic resistant bacteria. Especially our extensive study of the colonization dynamics of Enterococcus spp. during ICU stay reinforced the notion that SDD therapy does not cover this group of bacteria and highlights the importance of a critical control of the emergence of antibiotic resistance in enterococci and their spread and dissemination as known potential pathogens.

Furthermore, the extensive use of antibiotics could select for an increase in the rate of antibiotic resistance against aminoglycosides and beta-lactams, indicating that a control in the use of broad spectrum antibiotics needs to be considered. In addition, this thesis provides evidence regarding the possible genetic background involved in the subsistence phenotype, however, future studies on metabolic pathways could provide novel insight into the underlying mechanisms.

Nutritional value of browse species most fed to zoo animals
Huisman, T.J. ; Hokwerda, J. - \ 2015
dierenwelzijn - dierentuindieren - diervoeding - diergezondheid - planten - voedingswaarde - begraasbare planten of plantendelen - animal welfare - zoo animals - animal nutrition - animal health - plants - nutritive value - browse
Poster met voedingswaarde van begraasbare planten voor dierentuindieren.
Plantes toxiques pour les animauxd de zoo
Huisman, T.R. ; Hokwerda, J. - \ 2014
VHL Animal Management
dierentuindieren - dierenwelzijn - diervoeding - giftige planten - vergiftiging - diergezondheid - zoo animals - animal welfare - animal nutrition - poisonous plants - poisoning - animal health
Poster met een overzicht van planten die giftig zijn voor (dierentuin)dieren.
Le top 12 des groupes d’aliments en zoo-nutrition : un apercu des propriétés principales des groupes d’aliments fréquemment utilisés en zoo-nutrition
Huisman, T.R. ; Hokwerda, J. - \ 2014
VHL Animal Management
dierentuindieren - diervoeding - dierenwelzijn - diergezondheid - zoo animals - animal nutrition - animal welfare - animal health
Een overzicht van de eigenschappen van veel gebruikte voedselgroepen in dierentuinvoeding.
Système d'évaluation des fécès: le score fécal
Huisman, T.R. ; Hokwerda, J. - \ 2014
VHL Animal Management, Animal Welfare Web (DWW)
dierentuindieren - diervoeding - dierenwelzijn - mest - feces - diergezondheid - zoo animals - animal nutrition - animal welfare - manures - faeces - animal health
Kleur, vorm en stevigheid van de uitwerpselen vertellen iets over het dier, het soort voer en de kwaliteit hiervan. Door een goede mest-beoordeling kunnen problemen snel herkend worden. Hoe ziet goede mest van een diersoort er uit? En hoe word de mest beoordeeld?
Le valeurs nutritionnelles des invertebrés : un aperçu du contenu nutritionnel, sur une base matière sèche, des espèces d’invertébrés utilisés comme nourriture
Huisman, T.R. ; Hokwerda, J. - \ 2014
VHL Animal Management, Animal Welfare Web (DWW)
dierentuindieren - diervoeding - dierenwelzijn - diergezondheid - voedingswaarde - ongewervelde dieren - zoo animals - animal nutrition - animal welfare - animal health - nutritive value - invertebrates
Poster met een overzicht van de voedingswaarde van invertebraten.
Sucre et autres nutriments dans les produits alimentaires (fruits et légumes)
Huisman, T.R. ; Hokwerda, J. - \ 2014
VHL Animal Management, Animal Welfare Web (DWW)
dierentuindieren - dierenwelzijn - diergezondheid - diervoeding - zoo animals - animal welfare - animal health - animal nutrition
Overzicht van suikers en andere nutriënten in fruit en groenten.
Onderzoek naar de affecten van de aanleg van damwanden en grondverdichting op tandwalvissen in het Dolfinarium Harderwijk
Haan, D. de - \ 2013
IJmuiden : IMARES (Report / IMARES Wageningen UR C020/13) - 62
dammen - uitrusting - zeezoogdieren - dierentuindieren - simulatie - diergedrag - dierenwelzijn - geluiden - veluwe - walvissen - oscillatie - dams - equipment - marine mammals - zoo animals - simulation - animal behaviour - animal welfare - sounds - whales - oscillation
Voor het vaststellen van de effecten van de aanleg van damwandinstallaties en grondverdichting als onderdelen van het grootschalig bouwplan Waterfront Harderwijk van de gemeente Harderwijk werden op vijf verschillende locaties van het bouwplan installaties gesimuleerd en de geluidseffecten daarvan in vier verschillende bassins op het terrein van het dolfinarium simultaan gemeten. Het onderzoek naar de effecten van het trilgeluid was beperkt tot de bassins waar bruinvissen en tuimelaars werden gehouden. Omdat er tijdens de proeven sterke reacties van haaien en roggen in het roggenbasin werden waargenomen, zijn in dit rapport enkele mitigerende maatregelen voor deze diersoorten opgenomen.
Nutritional value of invertebrates : an overview of the nutritional content of invertebrate species for use as feed
Stichter, M. ; Huisman, T.R. - \ 2012
dierentuindieren - diervoeding - dierenwelzijn - ongewervelde dieren - acheta domesticus - sprinkhanen - diergezondheid - zoo animals - animal nutrition - animal welfare - invertebrates - acheta domesticus - locusts - animal health
Poster giving an overview of the nutritional content of invertebrate species for use as feed.
Welzijnsindicatoren voor dierentuindieren = Welfare indicators for zoo animals
Koene, P. - \ 2012
Lelystad : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 545)
dierentuindieren - dierenwelzijn - indicatoren - zoo animals - animal welfare - indicators
Onderzocht is of het mogelijk is om welzijnsindicatoren te ontwikkelen voor bepaalde diersoorten die in dierentuinen verblijven en daarbij de kosten van de ontwikkeling van indicatoren te schatten.
Le score de condition physique
Huisman, T.R. ; Hokwerda, J. - \ 2011
VHL Animal Management
dierentuindieren - dierenwelzijn - diervoeding - diergezondheid - lichaamsgewicht - lichaamsafmetingen - zoo animals - animal welfare - animal nutrition - animal health - body weight - body measurements
Poster over de Body Condition Score (BCS). De BCS gaat uit van uiterlijke kenmerken van dieren, waaraan je kunt aflezen of ze te zwaar of te licht zijn.
Body Condition Score
Vijgeboom, W. ; Huisman, T.R. - \ 2011
dierentuindieren - dierenwelzijn - diervoeding - diergezondheid - lichaamsgewicht - lichaamsafmetingen - zoo animals - animal welfare - animal nutrition - animal health - body weight - body measurements
Poster over de Body Condition Score (BCS). De BCS gaat uit van uiterlijke kenmerken van dieren, waaraan je kunt aflezen of ze te zwaar of te licht zijn.
Answers quiz Body Condition Score
Vijgeboom, W. ; Huisman, T.R. - \ 2011
dierentuindieren - dierenwelzijn - diervoeding - diergezondheid - bouw (dier) - lichaamsgewicht - lichaamsafmetingen - zoo animals - animal welfare - animal nutrition - animal health - conformation - body weight - body measurements
Poster met quiz Body Condition Score. Er worden verschillende Body Condition Scores beschreven. Het is de bedoeling de juiste score bij het juiste dier te plaatsen.
Antwoorden quiz Body Condition Score
Vijgeboom, W. ; Huisman, T.R. - \ 2011
dierentuindieren - dierenwelzijn - diervoeding - diergezondheid - lichaamsgewicht - lichaamsafmetingen - zoo animals - animal welfare - animal nutrition - animal health - body weight - body measurements
Poster met antwoorden op de quiz Body Condition Score: de juiste scores zijn nu bij de verschillende dieren geplaatst.
Quiz mestscore
Vijgeboom, W. ; Huisman, T.R. - \ 2011
dierentuindieren - dierenwelzijn - diervoeding - dierlijke meststoffen - diergezondheid - zoo animals - animal welfare - animal nutrition - animal manures - animal health
Poster met quiz mestscore: Welke diersoort en welke mestscore hoort bij welke mest?
Antwoorden op de quiz mestscore
Vijgeboom, W. ; Huisman, T.R. - \ 2011
dierentuindieren - dierenwelzijn - diervoeding - diergezondheid - dierlijke meststoffen - zoo animals - animal welfare - animal nutrition - animal health - animal manures
Poster met antwoorden op de quiz mestscore: de diersoort en mestscore zijn nu bij de verschillende soorten mest geplaatst.
Planten giftig voor (dierentuin) dieren
Hillen, R. ; Huisman, T.R. - \ 2011
dierentuindieren - dierenwelzijn - diervoeding - giftige planten - vergiftiging - diergezondheid - zoo animals - animal welfare - animal nutrition - poisonous plants - poisoning - animal health
Poster met een overzicht van planten die giftig zijn voor (dierentuin)dieren.
Body Condition Score
Vijgeboom, W. ; Huisman, T.R. - \ 2011
dierentuindieren - dierenwelzijn - diervoeding - diergezondheid - zoo animals - animal welfare - animal nutrition - animal health
Poster on the Body Condition Score (BCS) as a tool to visually assess whether the animal is overweight or too thin.
Quiz Body Condition Score
Vijgeboom, W. ; Huisman, T.R. - \ 2011
dierentuindieren - dierenwelzijn - diervoeding - diergezondheid - zoo animals - animal welfare - animal nutrition - animal health
Poster with a quiz on Body Condition Scores. Different Body Condition Scores are described. The goal is to give each animal the correct score.
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