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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    Diversity of coordination mechanisms to support transactions : farmer - buyer relationships and farmer performance in the Brazilian pork chain
    Müller Martins, Franco - \ 2017
    Wageningen University. Promotor(en): S.W.F. Omta; J.H. Trienekens. - Wageningen : Wageningen University - ISBN 9789463436366 - 146
    supply chain management - pigmeat - pig farmers - farmers - piglets - buying groups - consumers - brazil - south america - ketenmanagement - varkensvlees - varkensboeren - boeren - biggen - inkoopcombinaties - consumenten - brazilië - zuid-amerika

    In the last decades consumers preferences have continuously triggered changes in quality regulations and the implementation of various private quality standards. New quality demands also imply new coordination arrangements to support transactions between food companies and their suppliers. To coordinate these transactions, food companies (i.e. buyers) use different types of governance structures (GSs) made up of different coordination mechanisms (CMs). These mechanisms are used to coordinate aspects such prices, quality, and allocation of resources (e.g. services, inputs). The general goal of this thesis is to analyse the complexity behind the GSs used to support transactions in the Brazilian Pork Chain (BPC). Furthermore, this thesis examines how these GSs impact on farmer performance and farmer investment. Brazil is the fourth world producer and exporter of pork. The quality standards and GSs used in this supply chain offer an interesting background to be examined with implications for theory and management. Chapter 1 presents a general introduction depicting the research problem, the research questions and the theoretical framework used in this thesis hich is grounded on Transaction Costs Economics, Supply Chain Management and Networks Theory. Chapter 2 examines, through an exploratory approach, the relationships between quality requirements and CMs. This study allows us to demonstrate that, in the BPC, chain actors use a wide array of CMs to support a non-diverse set of quality requirements. Quality requirements are based on public regulations and on a few specific requirements set by specific customers. The differences in CMs regard aspects such as base prices, criteria for bonuses, control on inputs and processes and resource allocation. Chapter 3 addresses the complexity of CMs embedded in a GS and the use of plural forms of coordination by individual buyers. A framework setting values of CMs on price, volume, quality and resource allocation, was used to demonstrate that a single GS (e.g. a contract) may include CMs on distinct positions within the market-hierarchy continuum. In addition, this framework is used, in four case studies, to support analyses on how and why individual buyers use plural CMs to support similar transactions. The main explanations that were found were the need to handle market fluctuations, the implementation of new and specific quality requirements, to adopt to CMs used by competitors, and to deal with bargaining power of specific groups of farmers. Chapter 4 applies structural equation modelling (SEM) to analyse influences of vertical (buyer-farmer) and horizontal relationships (farmer-farmer) on performance of pig farmers. Data were obtained through a survey questionnaire applied to 269 pig farmers. The results demonstrate that vertical and horizontal relationships improve performance and that horizontal relationships improve information exchange. In addition, the findings suggest that the context in which transactions take place (i.e. spot market, contracting), may affect these relationships. Chapter 5 analyses, based on the farmer survey, influences of buyer support on famer performance and farmer investments. A SEM analysis was applied to 199 farmers that deliver pigs through contracts. The results demonstrate positive influences of buyer support on farmer performance and farmer investment capacity. Chapter 6 provides a general discussion including theoretical, policy and management implications.

    Onderzoek Raalte : gezondheid biologische biggen : een beetje verwennen die biggen, want dan doen ze het beter
    Vermeer, H.M. - \ 2017
    Ekoland (2017)2. - ISSN 0926-9142 - p. 24 - 25.
    varkenshouderij - gelten - biggen - biologische landbouw - diergezondheid - dierenwelzijn - proefbedrijven - uitloop - spenen - varkens - pig farming - gilts - piglets - organic farming - animal health - animal welfare - pilot farms - outdoor run - weaning - pigs
    Biologisch opgefokte gelten zijn socialer en spenen meer en zwaardere biggen dan gangbaar opgefokte gelten. Biggen die al in de zoogperiode een stukje weide krijgen als uitloop hebben na het spenen sneller diarree, maar doen het tot 25 kg beter dan biggen zonder weidegang. Dit zijn de belangrijkste conclusies uit de allerlaatste proef van 50 jaar onderzoek op het varkensproefbedrijf in Raalte.
    Development of pigs raised in a group housing system for lactating sows and their litters
    Nieuwamerongen, S.E. van - \ 2017
    Wageningen University. Promotor(en): B. Kemp, co-promotor(en): J.E. Bolhuis; N.M. Soede. - Wageningen : Wageningen University - ISBN 9789463431392 - 270
    pigs - piglets - sows - biological development - group housing - lactation - weaning - environmental enrichment - animal behaviour - performance - varkens - biggen - zeugen - biologische ontwikkeling - groepshuisvesting - lactatie - spenen - omgevingsverrijking - diergedrag - prestatieniveau

    The aim of this thesis was to investigate the development of pigs that were raised in a newly developed group housing system for lactating sows and their litters, with a focus on the transition around weaning and performance later in life. The starting point of our multi-suckling (MS) system was the natural behaviour of pigs, and the system consisted of 5 farrowing pens connected to a communal area, which included a communal feeding area. Litters were grouped at 1 week of age. Compared with a conventional farrowing system (in which a sow and her piglets are housed in a pen in which the sow is confined individually in a crate), the MS system provided a more spacious and complex environment, with more social and physical enrichment. Before weaning, we found that MS piglets showed more feed-directed behaviour and less damaging behaviours, such as tail biting, than conventionally housed piglets. After weaning at 4 weeks of age, when housed in a more physically and socially enriched pen, MS-raised piglets showed a higher feed intake, a higher weight gain, more play behaviour, and less maladaptive behaviour than the conventionally raised piglets that were housed in a standard nursery pen. In a follow-up study, in which all pigs were housed under equal and enriched conditions after weaning, we found that piglets raised in the MS system had a higher feed utilisation and a lower carbohydrate absorption in an oral sugar absorption test in the early post-weaning phase. In a subsequent study, the same animals were used to investigate their social and cognitive development, using behaviour tests during which pigs competed for access to feed. We found few differences, but there were indications that the pigs raised pre-weaning in the MS system made more use of social information than the conventionally raised pigs. Lastly, we studied effects of different weaning procedures in the MS system (gradual weaning during 9 weeks of lactation vs. abrupt weaning at 4 weeks of age). Weaning seemed to have less impact for the pigs subjected to the gradual weaning treatment (reflected in weight gain and maladaptive behaviour). Also on the long term during the finishing phase (during which both groups were housed equally from 9 weeks of age), the pigs subjected to the gradual weaning treatment showed less maladaptive behaviour and had fewer body lesions than abruptly weaned pigs. To conclude, the multi-suckling system seems promising for improving pig performance, behaviour, and welfare, especially in combination with a more gradual weaning procedure during an extended lactation.

    Groepskraamsysteem: ontwikkeling van zeugen, biggen en vleesvarkens bij spenen op 4 of 9 weken leeftijd
    Peet-Schwering, C.M.C. van der; Nieuwamerongen, S.E. van; Bolhuis, J.E. ; Binnendijk, G.P. ; Soede, N.M. - \ 2017
    Wageningen : Wageningen Livestock Research (Livestock Research rapport 1012) - 38
    zeugen - zogende vrouwtjes - biggen - speenleeftijd - groepshuisvesting - kraamhokken - zogen - varkenshouderij - dierlijke productie - prestatieniveau - sows - lactating females - piglets - age at weaning - group housing - farrowing pens - suckling - pig farming - animal production - performance
    Op Varkens Innovatie Centrum Sterksel is het effect onderzocht van twee speenstrategieën op de ontwikkeling (groei, voeropname, gezondheid, spelgedrag en beschadigend gedrag) van biggen uit een groepskraamsysteem met vijf zeugen en haar biggen. In de ene groep werden de biggen abrupt gespeend op 4 weken leeftijd (A4). In de andere groep werden de biggen geleidelijk gespeend op 9 weken leeftijd door toepassing van intermittent suckling (IS9). De A4 biggen bleven na spenen in een groep van 35 bij elkaar in een verrijkt biggenhok. Op een leeftijd van 9 weken zijn zowel de A4 als de IS9 biggen opgelegd in verrijkte vleesvarkenshokken voor 35 dieren. De bevindingen van het onderzoek bij de zeugen, biggen en vleesvarkens zijn beschreven in dit rapport.
    LPS challenge in jonge biggen : VDI-12: effect voerinterventie op biggen
    Greeff, Astrid de; Allaart, Janneke ; Bruijn, Carlijn de; Schokker, Dirkjan ; Roubos, Petra ; Winkelman-Goedhart, Hélène ; Vastenhouw, Stéphanie ; Ruuls, Lisette ; Rebel, Johanna ; Smits, Mari - \ 2016
    Wageningen : Wageningen Livestock Research (Wageningen Livestock Research rapport 1009) - 21
    biggen - maatregel op voedingsgebied - adequate immuniteit - diergezondheid - lipopolysacchariden - varkenshouderij - dierhouderij - immunologie - piglets - nutritional intervention - immune competence - animal health - lipopolysaccharides - pig farming - animal husbandry - immunology
    Big die vroeg leert eten, bijt later minder
    Ordelman, E. ; Bolhuis, J.E. - \ 2015
    Boerderij/Varkenshouderij 101 (2015)8. - ISSN 0169-0167 - p. V14 - V15.
    bijtgedrag - biggen - zeug - speenperiode - kraamstal - staartbijten
    Effect of fructooligosaccharides on gut health in neonatal piglets : VDI-3 Piglet experimen
    Schokker, D. ; Jansen, R. ; Jansman, A.J.M. ; Vastenbouw, S. ; Bree, F.M. de; Bossers, A. ; Rebel, J.M.J. ; Smits, M.A. - \ 2015
    Wageningen : Wageningen UR Livestock Research (Livestock Research report 913) - 39
    piglets - intestines - animal health - oligosaccharides - intestinal microorganisms - immunology - biggen - darmen - diergezondheid - oligosacchariden - darmmicro-organismen - immunologie
    Gut microbial colonization and immune competence development are affected by early-life environmental and dietary interventions. The interplay between microbiota in the intestinal tract and the gut mucosal surfaces of the host is critical for the development of an accurate immune competence. In the present study we intervened during early life of suckling piglets by a daily oral administration of fructooligosaccharides (FOS solution) from day 2 – 14 and investigated the effects on intestinal microbiota composition (by 16S rDNA sequencing) and biological processes of the intestinal mucosal tissue (by genome-wide intestinal gene expression analysis) during the suckling phase.
    Antibiotica nadelig voor afweerontwikkeling jonge big
    Leneman, M. ; Smits, M.A. - \ 2015
    Veehouder en Veearts 29 (2015)3. - p. 6 - 8.
    varkenshouderij - biggen - diergezondheid - antibiotica - immuunsysteem - diergeneeskunde - pig farming - piglets - animal health - antibiotics - immune system - veterinary science
    Dat er vanwege resistentie ontwikkeling terughoudend met antibiotica moet worden omgesprongen is inmiddels gemeengoed. Wetenschappelijk onderzoek bij biggen op onderzoeksbedrijf Sterksel en bij Wageningen UR Livestock Research wijst nu ook uit dat antibiotica toediening in de eerste levensfase een langdurige negatieve invloed op de afweer heeft.
    Effect of maternal antibiotic intervention in sows on gut development and microbiota in offspring : report of Feed4Foodure, VDI-2: 2013/2014
    Greeff, A. de; Schokker, D. ; Roubos, P. ; Ramaekers, P. ; Peet-Schwering, C.M.C. van der; Bikker, P. ; Vastenhouw, S.A. ; Bree, F.M. de; Bossers, A. ; Harders, F.L. ; Smits, M.A. ; Rebel, J.M.J. - \ 2015
    Wageningen : Wageningen UR Livestock Research (Livestock Research report 892) - 48
    zeugen - antibiotica - microbiële besmetting - biggen - maatregel op voedingsgebied - varkenshouderij - diergezondheid - dierenwelzijn - veehouderij - sows - antibiotics - microbial contamination - piglets - nutritional intervention - pig farming - animal health - animal welfare - livestock farming
    A significant contribution to microbial colonization of piglets comes from the sow: via vertical transmission of vaginal flora during birth and transmission of mucosal immune memory and flora by feaces, colostrum and milk. In this study we determine the effect of an maternal nutritional intervention with an antibiotic on early microbial colonization of piglets. We used antibiotic treatment as a harsh intervention to investigate the hypothesis that the microbial composition in sows, may have an effect on the early microbial colonization of piglets.
    Groepskraamsysteem: analyse van de ontwikkeling van zeugen, biggen en vleesvarkens
    Peet-Schwering, C.M.C. van der; Nieuwamerongen, S.E. van; Bolhuis, J.E. ; Troquet, L.M.P. ; Hoofs, A.I.J. ; Soede, N.M. - \ 2015
    Wageningen : Wageningen UR Livestock Research (Livestock Research rapport 880)
    zeugen - biggen - varkenshouderij - varkensfokkerij - varkens - spenen - kraamhokken - varkensstallen - diergedrag - prestatieniveau - biggen werpen - vee - dierenwelzijn - groepshuisvesting - sows - piglets - pig farming - pig breeding - pigs - weaning - farrowing pens - pig housing - animal behaviour - performance - farrowing - livestock - animal welfare - group housing
    Op VIC Sterksel is de ontwikkeling (groei, voeropname, gezondheid, sociaal gedrag, spelgedrag en beschadigend gedrag) van biggen die opgegroeid zijn in een groepskraamsysteem en na spenen gehuisvest zijn in een verrijkt hok in een groep van 40 biggen vergeleken met de ontwikkeling van biggen die opgegroeid zijn in een traditioneel kraamhok en na spenen als toom bij elkaar zijn gehouden in een gangbaar hok met 10 biggen. Bij opleg in de vleesvarkensstal zijn alle biggen opgelegd in traditionele vleesvarkenshokken met 12 dieren per hok. De bevindingen van het onderzoek bij de zeugen, biggen en vleesvarkens zijn beschreven in dit rapport.
    Effect van voersysteem op technische resultaten en gezondheid van gespeende biggen
    Peet-Schwering, C.M.C. van der; Pas, P.A. van de; Binnendijk, G.P. - \ 2015
    Wageningen : Wageningen UR Livestock Research (Livestock Research rapport 870) - 23
    varkens - biggen - voedersystemen - drinkwater - diergezondheid - varkenshouderij - veehouderij - kweken - voeropname - groei - pigs - piglets - feeding systems - drinking water - animal health - pig farming - livestock farming - rearing - feed intake - growth
    Op Varkens Innovatie Centrum Sterksel is onderzocht wat het effect is van het verstrekken van voer en drinkwater via een geoptimaliseerd voer- en drinkwatersysteem (Feeder) of via 2-vaksdroogvoerbakken en drinkbakjes (controlegroep) op de groei, voeropname, waterverbruik, voederconversie, eet- en drinkgedrag en gezondheid van gespeende biggen. De resultaten van het onderzoek zijn in dit rapport beschreven.
    Effect van voerniveau bij drachtige lacterende zeugen op reproductie en conditie = Effect of feeding level in gestating lactating sows on reproduction and condition
    Peet-Schwering, C.M.C. van der; Rommers, J.M. ; Troquet, L.M.P. ; Soede, N.M. - \ 2015
    Wageningen : Wageningen UR Livestock Research (Livestock Research report 861) - 39
    zeugen - voeropname - varkensvoeding - varkenshouderij - lichamelijke fitheid - zogen - voortplantingsvermogen - biggen - lactatie - sows - feed intake - pig feeding - pig farming - physical fitness - suckling - reproductive performance - piglets - lactation
    Op VIC Sterksel is onderzocht wat het effect is van het voerniveau van zeugen tijdens de laatste 8 dagen van een zes weekse lactatie waarin ze ook drachtig zijn op de gewichts- en spekdikte ontwikkeling van de zeugen, de resultaten van de biggen en het aantal levend en dood geboren biggen in de volgende worp. De resultaten van het onderzoek zijn in dit rapport beschreven.
    Copper in diets for weaned pigs : influence of level and duration of copper supplementation
    Bikker, P. ; Baal, J. van; Binnendijk, G.P. ; Diepen, J.T.M. van; Troquet, L.M.P. ; Jongbloed, A.W. - \ 2015
    Wageningen : Wageningen UR Livestock Research (Livestock Research report 830) - 38
    varkens - biggen - spenen - koper - diervoedering - minerale supplementen - groei - dunne darm - voedertoevoegingen - biggenvoeding - pigs - piglets - weaning - copper - animal feeding - mineral supplements - growth - small intestine - feed additives - piglet feeding
    This study was conducted to determine the influence of level (15-160 mg/kg voer)and period (2-8 weeks) of supply of a Cu-supplement on growth performance and expression of Cu absorption-related genes in different segments of the small intestine of weaned pigs.
    Knelpunten bestrijding mond- en klauwzeer en klassieke varkenspest
    Bergevoet, R.H.M. ; Bondt, N. ; Asseldonk, Marcel van - \ 2014
    Den Haag : LEI Wageningen UR (LEI report 2014-022) - ISBN 9789086156818 - 37
    mond- en klauwzeer - klassieke varkenspest - huisvesting, dieren - biggen - overschotten - dierenwelzijn - varkens - vleeskalveren - melkvee - schapen - geiten - ziektebestrijding - diergezondheid - dierlijke productie - dierziekten - foot and mouth disease - classical swine fever - animal housing - piglets - surpluses - animal welfare - pigs - veal calves - dairy cattle - sheep - goats - disease control - animal health - animal production - animal diseases
    Dit onderzoek inventariseert de belangrijkste knelpunten tijdens de uitbraakfase van Mond- en klauwzeer en Klassieke Varkenspest die voortkomen uit de geldende regelgeving en/of uit de structuur van veehouderijsectoren, en beschrijft de mogelijke oplossingsrichtingen.
    Invloed van mengmoment, leefoppervlak en hokverrijking op gedrag, beenwerk en productie van opfokzeugen tot en met de eerste worp = Influence of mixing moment, space allowance and enrichment on behaviour, leg soundness and production of gilts till first weaning
    Peet-Schwering, C.M.C. van der; Soede, N.M. ; Hoofs, A.I.J. ; Verheijen, R.G.J.A. ; Binnendijk, G.P. ; Opschoor, C. - \ 2014
    Wageningen : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 784) - 64
    varkenshouderij - biggen - vrouwelijke dieren - zeugen - opfoktechnieken - diergedrag - invloeden - lichaamsconditie - dierenwelzijn - pig farming - piglets - female animals - sows - rearing techniques - animal behaviour - influences - body condition - animal welfare
    At Swine Innovation Centre Sterksel the effects of mixing moment, space allowance (from day 14 after birth till day 232) and enrichment on behaviour, leg soundness and production of gilts from day 14 after birth till first weaning were investigated. The results are described in this report.
    Voerstrategie voor vleesvarkens in relatie tot genetische aanleg en geboortegewicht
    Peet-Schwering, C.M.C. van der; Troquet, L.M.P. ; Binnendijk, G.P. ; Vogelzang, R.H. ; Knol, E.F. - \ 2014
    Wageningen : Wageningen UR Livestock Research (Rapport / Wageningen UR Livestock Research 816) - 37
    diervoedering - varkens - varkenshouderij - biggen - diergenetica - geboortegewicht - economische zoölogie - varkensvlees - agrarische bedrijfsvoering - animal feeding - pigs - pig farming - piglets - animal genetics - birth weight - economic zoology - pigmeat - farm management
    At Swine Innovation Centre Sterksel the effects of genetic background, birth weight and feeding strategy on the performance and financial results of piglets and growing and finishing pigs were investigated. The results are described in this report.
    Actualisering ammoniakemissiefactoren vleesvarkens en biggen : advies herberekening op basis van welzijnseisen
    Groenestein, C.M. ; Aarnink, A.J.A. ; Ogink, N.W.M. - \ 2014
    Wageningen : Wageningen UR Livestock Research (Livestock Research rapport 786) - 24
    dierlijke productie - dierenwelzijn - diergezondheid - huisvesting, dieren - varkens - klimaat - ammoniakemissie - biggen - varkensstallen - stalklimaat - animal production - animal welfare - animal health - animal housing - pigs - climate - ammonia emission - piglets - pig housing - stall climate
    Deze studie heeft als doel de emissiefactoren voor de verschillende hokoppervlakken te evalueren en eventueel te herberekenen in het zicht van de huidige stand van zaken m.b.t. welzijnseisen, wetenschappelijke kennis en verwachte ontwikkelingen in de varkenshouderij
    Unveiling causes for growth retardation in piglets
    Paredes Escobar, S. - \ 2014
    Wageningen University. Promotor(en): Leonard den Hartog, co-promotor(en): Martin Verstegen; Walter Gerrits. - Wageningen : Wageningen University - ISBN 9789462571204 - 168
    biggen - groei - mestresultaten - geboortegewicht - speengewicht - voer - groeivertraging - inslineresistentie - varkensvoeding - diervoeding - voedingsfysiologie - piglets - growth - fattening performance - birth weight - weaning weight - feeds - growth retardation - insulin resistance - pig feeding - animal nutrition - nutrition physiology

    The evolution of hyper‐prolific sow breeds has led to a higher number of piglets born per sow per year. This increase in litter size has enlarged the number of light weight (or growth retarded) piglets, increased pre‐weaning mortality and heterogeneity at the end of the nursery phase (ten weeks of age). These poorly performing piglets represent a challenge to the swine industry as their presence in the herd has economic and welfare implications.

    Reducing the heterogeneity at the end of the nursery phase is relevant, as it influences the efficiency of use of the grower and finisher facilities, and/or it reduces penalties for delivering underweight piglets to the slaughterhouse. The focus of this thesis was the end of the nursery phase, as this is the time point where piglets are transferred to the grower and finisher facilities.

    The aim of this thesis was to identify and describe the causes of growth retardation in the nursery phase to provide a basis to look for alternative nutrition or management solutions.

    The database analysis described in Chapter 2 provides a phenotypic definition of growth retardation based on the risk factor analysis approach, and describes season of birth, body weight at birth, at weaning and at six weeks of age as the main factors to predict piglet BW at the end of the nursery phase.

    Based on the algorithm developed to predict piglets’ BW at the end of the nursery phase, our target population was defined as piglets with a birth weight above the mean ‐2 times the SD from the total population and a predicted BW at the end of the nursery phase below the mean ‐1 time the SD from the mean of the total population, considered Low Performing

    piglets LP). We aimed to characterize differences between LP piglets and their heavier counterpart (piglets with a predicted BW at the end of the nursery phase above the mean +1 time the SD from the mean of the total population HP).

    Compared to the HP, the LP piglets grew slower, ate less and were lighter but have an equal gain:feed ratio at ten weeks of age. The LP piglets tended to take more time to touch a novel object and spent more time eating. The LP and HP piglets have an equal macronutrient digestibility, with the exception of NSP. When fed a high fibre diet, both groups have a lower starch and fat apparent total tract digestibility. Yet, the LP piglets have a reduced fermentative capacity, which might place them in disadvantage. Also LP piglets are unable to engage into compensatory gain or compensatory feed intake, as efficiency of nutrient utilization and feed intake per kg BW0.75 was unaffected. In terms of skeletal muscle development, the LP piglets have a low muscularity (total fiber number and fiber cross sectional area), which might be of disadvantage for lean mass accretion in further life and for meat quality. The LP piglets exhibit insulin resistance and a lower pancreatic amylase activity, which might be related to the lower performance. Lastly, in the general discussion a comparison of the main findings with literature characterizing growth retarded piglets is presented. Also based on modelled data, the economic impact of growth retarded piglets is estimated from 10 weeks of age until slaughter weight (110 kg BW).

    The studies reported in this thesis describe a novel method for selecting growth retarded piglets in the nursery phase and provide insight into possible mechanism for growth retardation in the piglet phase.

    Met het water naar de dokter : innovatief drinkwatersysteem
    Ellen, H.H. ; Classens, P.J.A.M. - \ 2014
    Lelystad : Wageningen UR Livestock Research
    varkenshouderij - biggen - spenen - drinkwater - diergezondheid - waterkwaliteit - pig farming - piglets - weaning - drinking water - animal health - water quality
    Het doelstelling van dit project is het praktisch testen van het innovatieve drinkwatersysteem bij gespeende biggen op haar werking en haar effect op gebied van diergezondheid, technische resultaten en drinkwaterkwalitei
    Effect geboortegewicht en voeropname op S. suis
    Peet-Schwering, C.M.C. van der; Troquet, L.M.P. ; Smith, H. ; Hout, J. van - \ 2014
    V-focus 11 (2014)3. - ISSN 1574-1575 - p. 32 - 33.
    varkenshouderij - biggen - biggenziekten - streptococcus suis - geboortegewicht - biggenvoeding - voeropname - invloeden - ziekte-incidentie - pig farming - piglets - piglet diseases - streptococcus suis - birth weight - piglet feeding - feed intake - influences - disease incidence
    Er is geen duidelijk effect van geboortegewicht en van voeropname vóór spenen op het aantal biggen met klinische verschijnselen van een Streptococcus suis (S. suis) infectie. Dit blijkt uit onderzoek dat is uitgevoerd in opdracht van het Productschap Vee en Vlees en het ministerie van Economische Zaken.
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