References of "Beckers, Yves"
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See detailOptimiser l'usage des fourrages auto-produits et viser l'autonomie protéique
Beckers, Yves ULg

Conference given outside the academic context (2011)

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See detailD31-1254: Influence de l'âge et du poids d'abattage sur la qualité organoleptique du poulet de chair à croissance lente en Région wallonne (Rapport d'activités intermédiaire).
De Maeseneire, Coraline ULg; Beckers, Yves ULg; Thewis, André ULg

Report (2011)

Ces dernières années, la progression de la production avicole en Wallonie est, en grande partie, liée au développement de filières dites de qualité différenciée. En 2009, ce sont près de 2.000.000 de ... [more ▼]

Ces dernières années, la progression de la production avicole en Wallonie est, en grande partie, liée au développement de filières dites de qualité différenciée. En 2009, ce sont près de 2.000.000 de poulets qui ont été associés à ce type de production. Cependant, contrairement au poulet standard pour lesquels les pratiques sont très standardisées, les pratiques d’élevage en qualité différenciée peuvent varier, notamment la génétique, l’âge et le poids à l’abattage, le sexe de l’animal, l’accès à un parcours… Ces variations peuvent influencer l’homogénéité de la qualité organoleptique de la viande de poulet au sein d’une même filière ainsi que la perception (et la confiance) des consommateurs vis-à-vis de la viande des poulets qui en sont issus. L’objectif de ce projet est d’étudier et d’objectiver de manière scientifique la qualité organoleptique de la viande de poulet de chair au sein de trois filières avicoles de qualité différenciée afin de fournir aux détenteurs de ces filières des informations quant aux facteurs susceptibles de modifier la qualité organoleptique de leurs produits ainsi que la perception de ceux-ci par les consommateurs. [less ▲]

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See detailLa production de viande par les bovins
Beckers, Yves ULg

Conference given outside the academic context (2011)

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See detailLa production de viande par les bovins
Beckers, Yves ULg

Conference given outside the academic context (2011)

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See detailUsefulness of a Vancomycin pretreatment when challenging chickens in order to evaluate anti-Salmonella preparations
Marcq, Christopher ULg; Cambier, Carole ULg; Thewis, André ULg et al

in Ceylan, Necmettin; Ciftci, Ibrahim; Adabi, Shahram (Eds.) 18th European Symposium on Poultry Nutrition: Proceedings (2011, October)

For many years, Salmonella infection models have been developed in chickens with the aim to study the effects of prophylactic or therapeutic measures on the colonization of the gut. However, although the ... [more ▼]

For many years, Salmonella infection models have been developed in chickens with the aim to study the effects of prophylactic or therapeutic measures on the colonization of the gut. However, although the literature includes numerous challenge models, few studies investigated the infection rates among the inoculated population. We have implemented an antibiotic pretreatment of the chickens (vancomycin hydrochloride, 25 mg/bird) as an infection promoter. Indeed, vancomycin affects the normal gut microflora and releases sites for Salmonella at the intestinal epithelium. Two experiments were undertaken and a presence/absence cloacal swab method was used to evaluate cecal colonization. In the first experiment, birds were orally inoculated with Salmonella Typhimurium at 21 days of age. Three inoculum doses (3 × 103, 3 × 106, 3 × 109 cfu/bird) and an uninfected control were compared according to whether or not vancomycin had been used. Higher levels of Salmonella colonization (more than 70 %) were achieved in the gut by pretreating birds with vancomycin before inoculation (P < 0.05). In the second experiment, chicks were inoculated at 7 days of age with 108 cfu/bird after a vancomycin pretreatment, leading to an infection rate of 87.5 %. In conclusion, vancomycin promotes efficiently the percentage of colonized birds in the challenged population, with either young animals or olders. [less ▲]

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See detailLa Belfeed : un moyen de contrôler la microflore du tube digestif de la volaille et du porc
Vandeplas, Sabrina; Beckers, Yves ULg; Bruyer, Denis

Conference given outside the academic context (2011)

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See detailProduction de viande - réchauffement climatique
Beckers, Yves ULg; Jerome, Elisabeth ULg; Moureaux, Christine ULg et al

Article for general public (2011)

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See detailLa féverole en alimentation animale
Beckers, Yves ULg

Scientific conference (2011, May 05)

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See detailRations d'engraissement, rappel de quelques fondamentaux
Beckers, Yves ULg

Article for general public (2011)

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See detailEx vivo ruminal cellulosome for by-product biomass conversion
Hissette, Mathias ULg; Destain, Jacqueline ULg; Thewis, André ULg et al

Conference (2011, April 27)

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See detailCarbon exchange in a Belgian grassland with cattle
Jerome, Elisabeth ULg; Beckers, Yves ULg; Bodson, Bernard ULg et al

Poster (2011, April 08)

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See detailLogiciel de formulation
Beckers, Yves ULg

Software (2011)

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See detailTarissement court vs long ? Lactation longue vs courte ?
Beckers, Yves ULg

Conference given outside the academic context (2011)

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See detailLes produits du maïs fourrage : comment les réfléchir dans les rations des bovins ?
Beckers, Yves ULg

Conference given outside the academic context (2011)

Présentation des principales caractéristiques des produits du maïs fourrage et des éléments positifs et négatifs de leur introduction dans les rations des bovins.

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See detailAlimentation et définitions des rations dans les exploitations laitières
Beckers, Yves ULg

Scientific conference (2011, February 02)

Présentation des principaux principes du rationnement des vaches laitières

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See detailLes aspects nutritionnels de la betterave fourragère et son intégration dans les rations
Beckers, Yves ULg

Conference given outside the academic context (2011)

Présentation des principales caractéristiques de la betterave fourragère et des éléments positifs et négatifs de son intégration dans les rations des bovins.

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See detailSalmonella Typhimurium oral challenge model in mature broilers: Bacteriological, immunological, and growth performance aspects.
Marcq, Christopher ULg; Cox, Edwin; Szalo, Ioan Mihai ULg et al

in Poultry Science (2011), 90(1), 59-67

In this study, Salmonella enterica serovar Typhimurium challenge models were tested to identify the best conditions under which to perform the experimental infection of 3-wk-old broilers. Such a model ... [more ▼]

In this study, Salmonella enterica serovar Typhimurium challenge models were tested to identify the best conditions under which to perform the experimental infection of 3-wk-old broilers. Such a model would be useful to study the efficiency of therapeutic treatments that could take place at the end of the grow-out period. Salmonella-free chicks were obtained from a breeder flock vaccinated with Salmonella. Intestinal maternal immunity was monitored by ELISA analyses at 2, 9, and 16 d of age. Data indicated that protection of maternal origin was not maintained over time and was drastically reduced at 9 d of age (P < 0.01). At 21 d of age, chickens were orally inoculated with Salmonella Typhimurium. The effects of the oral challenge dose (0, 3 x 10(3), 3 x 10(6), and 3 x 10(9) cfu/bird) and vancomycin pretreatment (no administration or 25 mg/bird) on intestinal immune responses, growth performance, and Salmonella colonization of chickens were investigated. After infection, the mucosal immune response was rapid, with increased (P < 0.01) anti-Salmonella Typhimurium IgA titers measured at 8 d postinfection in intestinal contents. A linear relationship (P < 0.05) existed between specific IgA levels in intestinal and cecal contents and the challenge dose inoculated. None of the challenge protocols caused mortality or clinical symptoms after infection. Nevertheless, the experimental infection induced a significant deterioration of growth performance. The pretreatment with 25 mg of vancomycin at 3 h before Salmonella inoculation was able to establish stable infection rates among the population of 3-wk-old infected chickens. Nevertheless, Salmonella shedding was not stable over the rearing period, and the bacteria seemed to be naturally eliminated from most birds at 22 d postinfection. This natural clearance of the gut, which was related, at least in part, to the intestinal immune response, should limit the usability of the created mature challenge model within 1 to 2 wk after inoculation. [less ▲]

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