References of "Beckers, Yves"
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See detailAntibodies Dynamics in the Broiler Digestive Tract after Salmonella Typhimurium Oral Challenge
Marcq, Christopher ULg; Cox, Edwin; Thewis, André ULg et al

in Duclos, Michel; Nys, Yves (Eds.) XIIIth European Poultry Conference: Program & Book of Abstracts, World's Poultry Science Journal, Volume 66, Supplement (2010, August)

This study aimed to provide directions for Salmonella challenge experiment conception by offering a better understanding of the relationship between age and mucosal immune responsiveness of chicken ... [more ▼]

This study aimed to provide directions for Salmonella challenge experiment conception by offering a better understanding of the relationship between age and mucosal immune responsiveness of chicken. Intestinal maternal immunity of Salmonella-free chicks was monitored by ELISA analyses at 2, 9 and 16 days of age. At 21 days of age, chicks were orally inoculated with Salmonella Typhimurium. Three inoculum doses (3 x 10E3, 3 x 10E6, 3 x 10E9 cfu/bird) and an uninfected control were then compared concerning mucosal immune status of the small intestine and cecum. Results suggest that difficulties encountered to infect very young chicks can be related, at least partly, to maternal immunity. The relatively low level of intestinal immune defences observed thereafter could indicate a right time to perform an experimental infection of birds and to maximize the spreading of the pathogen during challenge experiment. After infection of 3-week-old chickens, the mucosal immune response was rapid with increased anti-Salmonella Typhimurium IgA titers. There was a linear relationship between specific IgA levels in intestinal and cecal secretions and the challenge dose initially inoculated. [less ▲]

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See detailAlimentation des ruminants
Beckers, Yves ULg

Conference given outside the academic context (2010)

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See detailMesure de l'ingestion des fourrages chez le ruminant
Beckers, Yves ULg

Scientific conference (2010, April 14)

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See detailSalmonella in chicken : Current and developing strategies to reduce contamination at farm level
Vandeplas, Sabrina ULg; Dubois Dauphin, Robin ULg; Beckers, Yves ULg et al

in Journal of Food Protection (2010), 73(4), 774-785

Salmonella sp. is a human pathogen that frequently infects poultry flocks. Consuming raw or undercooked contaminated poultry products can induce acute gastro-enteritis in human. Faced with the public ... [more ▼]

Salmonella sp. is a human pathogen that frequently infects poultry flocks. Consuming raw or undercooked contaminated poultry products can induce acute gastro-enteritis in human. Faced with the public health concern associated with salmonellosis, the European Union (EU) has established a European regulation forcing Member States (MS) to implement control programs aimed at reducing Salmonella prevalence in poultry production, especially at the primary production level. The purpose of the present review article is to summarise the current research and to suggest future developments in the area of Salmonella control in poultry, which may be of value to the industry in the coming years. The review will focus especially on preventive strategies that have been developed and that aim at reducing the incidence of Salmonella colonization in broiler chickens at farm level. Besides the usual preventive hygienic measures, different strategies have been investigated, like feed and drinking water acidification by organic acids and immune strategies based on passive and active immunity. Modulating the diet in terms of ingredient and nutrient composition with the intent of reducing the bird’s susceptibility to Salmonella has also been examined. Because in-ovo feeding has been shown to accelerate small intestinal development and to enhance the epithelial cell function, it could also be an efficient tool to control enteric pathogens. Microflora-modulating feed additives, like antibiotics, prebiotics, probiotics, and synbiotics, represent another field of investigation, whose success depends on the additive used. Finally, recent control methods, such as chlorate products and bacteriophages, have also been studied. [less ▲]

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See detailLa période de tarissement chez la vache laitière
Beckers, Yves ULg

Conference given outside the academic context (2010)

Présentation des éléments historiques et actuels intervenant dans le choix de la durée des périodes tarissement et de lactation chez la vache laitière. Informations sur l'usage de rations acidifiantes en ... [more ▼]

Présentation des éléments historiques et actuels intervenant dans le choix de la durée des périodes tarissement et de lactation chez la vache laitière. Informations sur l'usage de rations acidifiantes en prévention de l'hypocalcémie de lait. [less ▲]

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See detailLogiciel de rationnement
Beckers, Yves ULg

Software (2010)

Les étapes du calcul sont : (i) la caractérisation de la vache laitière, (ii) le calcul des besoins de cet animal, (iii) le choix des aliments disponibles pour constituer la ration, (iiii) la proposition ... [more ▼]

Les étapes du calcul sont : (i) la caractérisation de la vache laitière, (ii) le calcul des besoins de cet animal, (iii) le choix des aliments disponibles pour constituer la ration, (iiii) la proposition de la ration. [less ▲]

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See detailPrevalence and sources of Campylobacter spp. contamination in free-range broiler production in the southern part of Belgium
Vandeplas, Sabrina ULg; Dubois Dauphin, Robin ULg; Palm, Rodolphe ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2010), 14(2), 279-288

A one year epidemiological study was carried out between February 2005 and January 2006 in the southern part of Belgium to assess the Campylobacter prevalence in free-range broiler production. Three ... [more ▼]

A one year epidemiological study was carried out between February 2005 and January 2006 in the southern part of Belgium to assess the Campylobacter prevalence in free-range broiler production. Three successive broiler flocks from six Belgian farms were investigated for the presence of Campylobacter spp. during the rearing period. Each flock was visited four times, before and after the outdoor rearing period. During each visit, samples were taken in the broiler house (litter, cecal droppings, water-lines, feed, anteroom) as well as from the outer rearing environment (open-air range). The Campylobacter detection in all samples was carried out according to the ISO 10272 standard. Identification was based on colonial morphology, microscopic examination, and biochemical tests. PCR multiplex was used for genetic confirmation. Campylobacter jejuni was the main species isolated from all contaminated samples. Overall, mixed infections C. jejuni/C. coli represented 40.6%, while C. jejuni and C. coli represented 46.9% and 12.5% of chicken samples respectively. A 100% flock contamination was observed in the 6 farms during the summer/autumn period, whereas only 66.7% and 33.3% of the flocks became Campylobacter-positive in spring and winter respectively, at the end of the rearing period. Half of contaminated flocks were infected before chickens have access to the open-air range. Environmental samples, especially the open-air range soil, were found to be Campylobacter-positive before flock infection. The other potential sources of contamination were delivery tray, anteroom floor and water-lines. Other animal productions like cattle on the farm, no applied rodent control, no cleaning and disinfection of water-lines between flocks, no detergent used for cleansing and thinning were recorded as risk factors. In conclusion, the contact with the environment, particularly the access to an open-air range, appeared to be the major way of Campylobacter contamination of chickens in free-range broiler production. [less ▲]

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See detailInfluencia de la modalidad de presentación del trigo
Piron, Fabien ULg; Philippart de Foy, Martin; Thewis, André ULg et al

Article for general public (2010)

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See detailEffect of the bacterial or fungal origin of exogenous xylanases supplemented to a wheat-based diet on performance of broiler chickens and nutrient digestibility of the diet
Vandeplas, Sabrina ULg; Dubois Dauphin, Robin ULg; Thonart, Philippe ULg et al

in Canadian Journal of Animal Science (2010), 90(2), 221-228

Two identical experiments were carried out to study the effects of four xylanases from bacterial or fungal origin supplemented to a wheat-based diet, on growth performance of broiler chickens and nutrient ... [more ▼]

Two identical experiments were carried out to study the effects of four xylanases from bacterial or fungal origin supplemented to a wheat-based diet, on growth performance of broiler chickens and nutrient digestibilities. Experimental treatments consisted of a control basal diet containing 600 g kg-1 wheat (C), and the basal diet supplemented with 0.1 g kg-1 Grindazyme G from Aspergillus niger (G), 0.1 g kg-1 Belfeed B1100MP from Bacillus subtilis (B), 0.1 g kg-1 Roxazyme G from Trichoderma viride (R), or 0.0125 g kg-1 of a xylanase from Aspergillus aculeatus (A). Each experimental diet was given to four groups of six chickens each. Growth performance and feed conversion ratio (FCR) were recorded weekly, from 7 to 21 d of age. In the second experiment, a digestion balance trial was performed from 27 to 31 d of age to evaluate the nitrogen-corrected apparent metabolizable energy (AMEn) and the digestibilities of nitrogen, crude fat, starch and crude fibre. From 7 to 21 d of age, xylanase supplementation led to increased final body weight and daily weight gain, by 3.7 and 4.5 % (P < 0.05), respectively, without significant difference according to the xylanase origin. Xylanase supplementation significantly increased the AMEn (+2.6 %), and the digestibilities of crude fibre (+58.9 %) and nitrogen (+1.6 %). Increase in AMEn as well as in crude fat and starch digestibilities were significantly different according to the xylanase, but were not dependent on fungal or bacterial origin. In conclusion, the microbial origin of xylanases supplemented to wheat-based diets influenced neither the performance of broiler chickens nor the improvement in nutrient digestibilities [less ▲]

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See detailEffect of bovine colostrum on the serum insulin-like growth factor-I (IGF-I), the IGF binding proteins-2 and -3 and the thyroid hormones in weaning piglets
Boudry, Christelle ULg; Dehoux, Jean-Paul; Colinet, Frédéric ULg et al

in Archiv Tierzucht (2010), 53(6), 675-688

This study examined the effect of a bovine colostrum supplementation on growth performance, feed intake and the hormonal response of piglets at weaning. Ninety-six newly-weaned piglets were assigned for ... [more ▼]

This study examined the effect of a bovine colostrum supplementation on growth performance, feed intake and the hormonal response of piglets at weaning. Ninety-six newly-weaned piglets were assigned for four weeks to one of the two treatments: Control (diet with bovine milk whey) and Colostrum (diet with bovine colostrum whey) treatments. The supplements were incorporated in a commercial diet at 20 g/kg during the first 2 weeks after weaning and lowered to 10 g/kg for the next 2 weeks. Body weight and feed intake were measured weekly. Blood samples were taken weekly for determination of circulating IGF-I, its binding proteins and the thyroid hormones (T3 and T4). During the first week of the trial, the Colostrum-fed piglets presented improved growth performance, feed intake and feed efficiency and a higher concentration in circulating IGF-I (+ 15 %) compared to the Control piglets. In both treatments, the circulating thyroid hormones were reduced by weaning and the levels measured at weaning were recovered earlier by the Colostrum-fed piglets compared to the Control group (P < 0.05). It is concluded that hormonal response observed after the bovine colostrum supplementation is, at least in part, consequent of the positive action of bovine colostrum on the feed intake. [less ▲]

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See detailAspects nutritionnels des vaches laitières et autonomie alimentaire
Beckers, Yves ULg

Conference given outside the academic context (2009)

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See detailProduction de viande - environnement : levons les équivoques !
Beckers, Yves ULg

Conference (2009, November 05)

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See detailImmunisation passive du poulet de chair vis-à-vis des salmonelles à l'aide d'anticorps du jaune d'oeuf
Marcq, Christopher ULg; Thewis, André ULg; Portetelle, Daniel ULg et al

in Impacts de l'alimentation sur la santé animale : nouveaux développements (2009, October 14)

Detailed reference viewed: 77 (29 ULg)