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See detailLes facteurs de virulence des alphaherpèsvirus
Muylkens, Benoît ULg; Meurens, François; Schynts, Frédéric et al

in Virologie (2003), 7

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See detailFacteurs de virulence et phénotypes de soixante et une souches d'Escherichia coli d'origine bovine, productrices de la toxine cytotoxique nécrosante de type 1 (CNF 1).
Pohl, P.; Daube, Georges ULg; Mainil, Jacques ULg et al

in Annales de Recherches Vétérinaires = Annals of Veterinary Research (1992), 23(1), 83-91

Virulence factors and phenotypes of 61 strains CNF1+ were investigated. Eighty-nine percent of the strains produced an aerobactin and were resistant to the bactericidal activity of sheep serum, both of ... [more ▼]

Virulence factors and phenotypes of 61 strains CNF1+ were investigated. Eighty-nine percent of the strains produced an aerobactin and were resistant to the bactericidal activity of sheep serum, both of which are properties of septicemic strains of E coli. None of the strains reacted either with DNA probes corresponding to the enterotoxins STaP, STb, LT-I and LT-IIa, or to the verotoxins VT-I and VT-II. None produced the adhesins K99, Att25 (FY or F17) and Att111. The great majority (93.4%) of the CNF1+E coli possessed both properties. These properties allow CNF1+ to be distinguished from CNF-E coli. [less ▲]

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See detailFacteurs de virulence et propriétés spécifiques des souches invasives d'Escherichia coli : I) les adhésines et facteurs de colonisation
Mainil, Jacques ULg

in Annales de Médecine Vétérinaire (2003), 147(2, APR-MAY), 105-126

Escherichia coli bacterial species is subdivided into several strains that are pathogenic for man and animals, on the basis of their specific properties and factors which are responsible for their ... [more ▼]

Escherichia coli bacterial species is subdivided into several strains that are pathogenic for man and animals, on the basis of their specific properties and factors which are responsible for their pathogenic characters. The pathogenic strains are classically subdivided into strains with intestinal tropism (enterotoxigenic, enteropathogenic, enterohaemmorrhagic, verotoxigenic and enteroinvasive) and with extraintestinal tropism (uropathogenic and invasive). Invasive strains cause septicaemia and/or bacteraemia with localisations in different internal organs (systemic infections): If specific virulence properties and factors of strains with intestinal tropism are quite well known and described, those of strains with extraintestinal tropism are much less characterised, especially in animals. The purpose of this serie of review articles is to present the current knowledge on specific properties and factors of extraintestinal strains: adhesins and colonisation factors, transmucosal transfer and survival in blood and internal organs, toxicity. The fourth manuscript will deal with the invasive strains themselves, focusing on the necrotoxigenic strains. This first manuscript presents the current knowledge on the receptors, roles in pathogenesis, structures, genetic determinism and identification methods of fimbrial adhesins of P (Pap, Prs), S (Sfa, F1C, Sfr) and F17 (Vir, Att25, FY, 20K, G, Att111) families and of afimbrial adhesins of Afa family (Afa, Nfa, F1845, Bma, Dr...). [less ▲]

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See detailFacteurs de virulence et propriétés spécifiques des souches invasives d'Escherichia coli : II) Franchissement des muqueuses et propriétés invasives
Mainil, Jacques ULg

in Annales de Médecine Vétérinaire (2003), 147(3, JUN-JUL), 159-171

Escherichia coli bacterial species is subdivided into several strains that are pathogenic for man and animals, on the basis of their specific properties and factors which are responsible for their ... [more ▼]

Escherichia coli bacterial species is subdivided into several strains that are pathogenic for man and animals, on the basis of their specific properties and factors which are responsible for their pathogenic characters. The pathogenic strains are classically subdivided into strains with intestinal tropism (enterotoxigenic, enteropathogenic, entero-haemorrhagic, verotoxigenic and enteroinvasive) and with extraintestinal tropism (uropathogenic and invasive). Invasive strains cause septicaemia and/or bacteraemia with localisations in different internal organs (systemic infections). If specific virulence properties and factors of strains with intestinal tropism are quite well known and described, those of strains with extraintestinal tropism are much less characterised, especially in animals. The purpose of this serie of review articles is to present the current knowledge on specific properties and factors of extraintestinal strains : adhesins and colonisation factors, transmucosal transfer and survival in blood and internal organs, toxicity. The fourth manuscript will deal with the invasive strains themselves, focusing on the necrotoxigenic strains. This second manuscript presents the current knowledge on the transmucosal transfer, resistance to the bactericidal activity of the complement, resistance to phagocytosis and production of colicins, that were, for several years, considered as an important specific property of invasive strains of E coli. [less ▲]

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See detailFacteurs de virulence et propriétés spécifiques des souches invasives d'Escherichia coli : III) Production de toxines
Van Bost, S.; Mainil, Jacques ULg

in Annales de Médecine Vétérinaire (2003), 147(5, OCT-NOV), 327-342

Escherichia coli bacterial species is subdivided into several strains that are pathogenic for man and animals, on the basis of their specific properties and factors which are responsible for their ... [more ▼]

Escherichia coli bacterial species is subdivided into several strains that are pathogenic for man and animals, on the basis of their specific properties and factors which are responsible for their pathogenic characters. The pathogenic strains are classically subdivided into strains with intestinal tropism (enterotoxigenic, enteropathogenic, enterohaemmorrhagic, verotoxigenic and enteroinvasive) and with extraintestinal tropism (uropathogenic and invasive). Invasive strains cause septicaemia and/or bacteraemia with localisations in different internal organs (systemic infections). If specific virulence properties and factors of strains with intestinal tropism are quite well known and described, those of strains with extraintestinal tropism are much less characterised, especially in animals. The purpose of this serie of review articles is to present the current knowledge on specific properties and factors of extraintestinal strains: adhesins and colonisation factors, transmucosal transfer and survival in blood and internal organs, toxicity. The fourth manuscript will deal with the invasive strains themselves, focusing on the necrotoxigenic strains. This third manuscript presents the current knowledge on toxins produced by invasive strains of E. coli: endotoxins, cytotoxic necrotising factors, cytolethal distending toxins and haemolytic toxins. [less ▲]

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See detailFacteurs de virulence et propriétés spécifiques des souches invasives d’Escherichia coli : IV) Les souches nécrotoxinogènes
Mainil, Jacques ULg; Van Bost, S.

in Annales de Médecine Vétérinaire (2004), 148(3), 121-132

Escherichia coli bacterial species is subdivided into several pathogen strains in man and animals, on the basis of their specific properties and factors which are responsible for their virulence. The ... [more ▼]

Escherichia coli bacterial species is subdivided into several pathogen strains in man and animals, on the basis of their specific properties and factors which are responsible for their virulence. The pathogenic strains are classically subdivided into strains with intestinal tropism (enterotoxigenic, enteropathogenic, enterohaemmorrhagic, verotoxigenic and enteroinvasive) and with extraintestinal tropism (uropathogenic and invasive). Invasive strains cause septicaemia and/or bacteraemia with localisations in different internal organs (systemic infections). If specific virulence properties and factors of strains with intestinal tropism are quite well known and described, those of strains with extraintestinal tropism are much less characterised, especially in animals. The purpose of this series of review articles is to present the current knowledge on specific properties and factors of extraintestinal strains. The first three manuscripts reviewed the characteristics of adhesins and colonisation factors, transmucosal transfer, survival in blood and internal organs, and toxicity. After the presentation of the animal and human invasive E. coli, this fourth manuscript reviews the current knowledge on the necrotoxigenic strains and finishes with a discussion on the meaning of the bacterial virulence in general. [less ▲]

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See detailFacteurs écologiques de production du frêne en Condroz et productivité des stations potentielles
Claessens, Hugues ULg; Thibaut, André; Rondeux, Jacques ULg

in Cahiers Forestiers de Gembloux (1993), 11

The aim of the present study is to correlate site variables with measured site index restricted to pure even-aged or nearly even-aged stands of ash. The site evaluation has been made through 81 ... [more ▼]

The aim of the present study is to correlate site variables with measured site index restricted to pure even-aged or nearly even-aged stands of ash. The site evaluation has been made through 81 experimental plots distributed throughout the Condroz under a wide range of ecological conditions and types of soils. Site index (top height at 50 years) was measured on each plot using tree height-age relationship according to an appropriate methodology [THIBAUT and al., 1992]. In order to appreciate the relative importance of all the observed or measured site factors, plots were grouped in three major groups related to site conditions and defined as follows : alluvial and colluvial sites, flats and slopes either on deep muddy soils or on stony soils. Topographic position, soil depth and soil drainage conditions had the highest correlation with measured site index. These variables and the three site groups have been successfully used as independent variables in a regression model that is an interesting tool for evaluating productive potential of a site for ash even devoid of trees. [less ▲]

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See detailLes facteurs explicatifs de la sensibilité à l’anxiété chez l’enfant: revue de la litterature
Stassart, Céline ULg; Etienne, Anne-Marie ULg

in Revue Francophone de Clinique Comportementale et Cognitive (2010), 15(2), 1-12

Anxiety sensitivity (AS) is the fear of anxiety-related sensations, arising from beliefs that the sensations have harmful physical, psychological or social consequences. AS is considered as a risk factor ... [more ▼]

Anxiety sensitivity (AS) is the fear of anxiety-related sensations, arising from beliefs that the sensations have harmful physical, psychological or social consequences. AS is considered as a risk factor for the development and preservation of anxiety disorders. It is thus important to understand the development of AS to have a preventive act of anxiety disorders. This article is a synthesis of studies that have investigated the etiology of child AS, to extract explanatory models. Some factors are playing a role in the development of AS: biologic, interpersonal and environmental factors. Results indicated that studies have investigated those factors alone, and those factors accounted a part of incremental variance in child AS. To improve the understanding of development of AS, a integrate model with some factors – sex of children, sex of parents, sources of learning, emotional and relational state of parents- may be investigate in future studies. [less ▲]

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See detailFacteurs explicatifs et dynamiques des procès de migration féminine et d’intégration en Belgique (FEMIGRIN)
Timmerman, Christiane; Martiniello, Marco ULg; Rea, Andrea et al

Report (2010)

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See detailFacteurs favorisant les pénétrations laryngées en gériatrie
ALLEPAERTS, Sophie ULg; DELCOURT, Sandrine; WISLEZ, Stéphanie et al

in Gériatrie et Psychologie Neuropsychiatrie du Vieillissement (2011), 9(1), 45-50

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See detailFacteurs genetiques de l'alcoolo-dependance Revue des principales donnees de la litterature.
Pinto, Emmanuel ULg; Ansseau, Marc ULg

in Encéphale (L') (2009), 35(5), 461-9

INTRODUCTION: Alcohol dependence is a complex and multifactorial disease resulting both from neurobiological mechanisms and environmental factors. It is frequently associated with comorbid psychiatric ... [more ▼]

INTRODUCTION: Alcohol dependence is a complex and multifactorial disease resulting both from neurobiological mechanisms and environmental factors. It is frequently associated with comorbid psychiatric disorders or with specific personality or behavioral features. Although action can be taken on the environment in order to decrease the risk of the illness, current methods used to prevent or to treat this pathology show moderate efficacy: problematic consumption of ethanol in the general population as well as relapse rates under treatment in dependent patients remain indeed very high. LITERATURE FINDINGS: It is therefore of major importance to broaden our knowledge of alcohol dependence and its comorbidities so as to improve both their prevention and treatment. In this perspective, recent progress in the field of neurosciences may contribute to achieve this goal. Precisely, genetics is a promising way benefiting from many advances in genetic epidemiology, cellular and molecular biology, neuroimaging and pharmacology. In parallel with a better understanding of the neurobiology of addictions and associated behaviors, these techniques led to the identification of brain mechanisms in which a genetic variation may influence the individual vulnerability towards alcohol dependence. Moreover, there is growing evidence that alcoholism results from the interaction of genetic and environmental factors influencing both its expression and its course. Given the fact that alcohol-dependence seems highly heritable (50 to 60% of the variance in both men and women), this review assesses the role of some of the genomic regions linked with the disease, as well as the principal variants of candidate genes identified as specifically involved in the predisposition. Polymorphisms of genes influencing alcohol metabolism, GABAergic, dopaminergic and serotonergic neurotransmission seem, indeed, at stake in the development of alcohol-dependence and its related features such as personality, behavior, impulse control or craving. In the future, a better characterization of the links between genotypes and phenotypes will probably increase our ability to treat alcoholic patients. [less ▲]

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See detailFacteurs génétiques et risque de dysglycémie dans des familles de diabétiques de type 2: l’étude DESCENDANCE
Franc, S; Cauchi, S; Yengo, L et al

in Diabètes & Métabolism (2015, April), 41(s1), 10-35

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See detailFacteurs influençant l'efficacité des repeuplements. In: Vers une nouvelle politique des rempoissonnements.
Rollin, X.; Poncin, Pascal ULg

in Vers une nouvelle politique de rempoissonnement (2006)

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See detailFacteurs influençant la consommation alimentaire et les performances zootechniques du porc sevré: perception et caractéristiques de l'aliment
Laitat, Martine ULg; De Jaeger, F.; Vandenheede, Marc ULg et al

in Annales de Médecine Vétérinaire (2004), 148(1), 15-29

Weaning is a critical period for piglets. Promoting solid food ingestion in the farrowing pen and early after weaning is essential to optimise piglets' performance, health and welfare. A lot of papers ... [more ▼]

Weaning is a critical period for piglets. Promoting solid food ingestion in the farrowing pen and early after weaning is essential to optimise piglets' performance, health and welfare. A lot of papers report studies about pigs' perception of the feed's organoleptic properties. Pigs are attracted by specific flavors and show taste acuity for the five basic stimuli. The choice of pigs for a diet formulation is mainly based on the protein content of the food and the absence of toxin or anti-nutritional contaminants. They also tend to prefer eating pellets and crumbles rather than meal. Weaned pigs readily accept liquid feed. Wet/dry feeders give the possibility to the pigs to mix water and food at the same place and notably allow them to eat faster when they are fed meal. However, wet feeding may induce greater food wastage. The influence of food visual aspect on feed intake in pigs has been little assessed. Visual and auditory stimuli produced by the feeding behaviour of penmates have although a better-known impact on feed intake in this species. [less ▲]

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See detailFacteurs influençant la performance de terrain en volley-ball
Forthomme, Bénédicte ULg; Croisier, Jean-Louis ULg; Ciccarone, Guido et al

in Actes du XIVe Congrès National Scientifique de la Société Française de Médecine du Sport (2004, November)

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See detailFacteurs influençant le comportement alimentaire et les performances du porc sevré: l'équipement d'alimentation.
Laitat, Martine ULg; Vandenheede, Marc ULg; Nicks, Baudouin ULg

in Annales de Médecine Vétérinaire (2005), 149(2), 61-74

Among the most important elements of the nursery pen design, the feeder allows or not the optimisation of pigs' performance. Two principal design features can characterize a feeder : the way pigs will be ... [more ▼]

Among the most important elements of the nursery pen design, the feeder allows or not the optimisation of pigs' performance. Two principal design features can characterize a feeder : the way pigs will be fed ( wet, dry or wet/dry) and its capacity, which depends in turn on the trough length or the number of feeding spaces ( mono - or multi- space feeder and communal trough). To determine the number of pigs that can be accommodated per feeder, the daily time spent per pig at the feeder - depending on pig size and feed delivered - must be taken into account. Recommendations of 4 to 10 weaned pigs per feeding space are generally given. Pigs are able to adapt their eating behaviour when crowding occurs but suboptimal situations may reduce feed intake and productivity and even impair welfare. Some particularities of the feeder such as limited depth, feeder gap opening, lip height, side panels or protective crate can limit feed spillage and/ or agonistic interactions at the feeder. Feeder position in the pen should prevent pigs to be disturbed while eating and allow free movement of penmates. [less ▲]

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