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See detailGénotrichoses alopéciantes de l'enfance.
Franchimont, Claudine ULg; Pierard, Gérald ULg

in Dermatologie Actualité (2007), 104

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See detailLe genotypage RHD foetal sur sang maternel dans le suivi prenatal des patientes Rh D negatif
Dricot, J. F.; Minon, J. M.; Schaaps, Jean-Pierre ULg et al

in Revue Médicale de Liège (2006), 61(12), 820-6

Since the beginning of RHD genotyping in maternal plasma, no Rh D positive baby was diagnosed RHD negative in our institution. Genotyping from circulating DNA in maternal plasma is as efficient as ... [more ▼]

Since the beginning of RHD genotyping in maternal plasma, no Rh D positive baby was diagnosed RHD negative in our institution. Genotyping from circulating DNA in maternal plasma is as efficient as genotyping on amniocyts but without the associated risks. We propose a prophylactic injection based on fetal genotyping RHD in maternal blood with 300 microg anti-D immunoglobulin at 28 weeks of amenhorrea in all of Rh D negative pregnant women whitch fetuses positive RHD. [less ▲]

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See detailGenotype by Environment Interaction for Production Traits of Holsteins Using Two Countries as Model: Luxembourg and Tunisia
Hammami, Hedi ULg

Doctoral thesis (2009)

Under globalization, breeding organizations are selecting animals and exchanging germplasm across various environments. Ignoring genotype by environment interaction (G x E) may affect the efficiency of ... [more ▼]

Under globalization, breeding organizations are selecting animals and exchanging germplasm across various environments. Ignoring genotype by environment interaction (G x E) may affect the efficiency of breeding strategies and limit outcomes from cooperation between breeding programs. Quantifying the effectiveness of indirect selection and effects of G x E for different breeds is therefore necessary. The objective of this thesis was to evaluate the magnitude of G x E for milk yield using Luxembourg and Tunisian Holstein populations. In fact, these two countries rely considerably on importation of superior genes from diverse origins for their breeding programs. This study needed records on both the genotype and the environment. In the first part of this thesis, genetic ties between the two populations were studied. Additive relationships and genetic similarity were important and genetic links have been strengthened with time which allowed the analysis of the phenotypic expression of daughters of common sires under each of these tow production environments. In the second part, genetic parameters for production traits of Tunisian Holsteins were estimated by a test-day random regression model (RRTD). Heritability estimates for 305-d milk, fat and protein yields were low to moderate (0.12 to 0.18) suspecting difficulties of high-producing cows to express their potential under limiting production conditions. In the third part, G x E for milk yield and persistency were investigated using character state models, where milk yield in each country was considered as a separate trait, and where the country border delimitation was designed as an environmental character state. A RRTD sire model was applied and was extended to a RRTD animal model. Significant G x E was detected for milk yield and persistency by both models. Large differences in genetic and permanent environmental variances between the two countries were observed. Genetic correlations for 305-d milk yield and persistency between Luxembourg and Tunisian Holsteins were 0.50 and 0.43 (sire model) and 0.60 and 0.36 (animal model). Moreover, low rank correlations obtained between estimated breeding values of common sires translate a significant re-ranking between the two environments. At the end of this thesis, a herd management (HM) parameter reflecting feeding and management intensity was defined. Three HM levels were identified in each country and G x E was investigated within- and across-environments. Significant G x E was detected between the Tunisian HM levels, whereas, only heterogeneous genetic variance for milk yield with limited re-ranking of sires across the three Luxembourg environments was observed. Overall, this thesis shows that under constraining environmental effects, selection for adaptive traits among economically valuable traits under their specific conditions is needed for low-input systems. When satisfactory feeding resources, management and husbandry practices are available, high degree environmental sensitivity is desired and the use of a high yielding breed may be encouraged. [less ▲]

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See detailGenotype by environment interaction in dairy cattle
Hammami, Hedi ULg; Rekik, Boulbaba; Gengler, Nicolas ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2009), 13(1), 155-164

The aim of this literature review was to identify the existence and scope of genotype by environment interaction (G x E) from reports on dairy cattle populations in different management systems, Methods ... [more ▼]

The aim of this literature review was to identify the existence and scope of genotype by environment interaction (G x E) from reports on dairy cattle populations in different management systems, Methods applied to deal with G x E (controlled experiments and large data modeling) were discussed. A G x E was confirmed essentially when high differences between production environments and/or genotypes (genetically distant genotypes) were observed. Environmental effects were aggregated in most studies and identification of the components of the environment was largely unresolved, with only a few studies based on more definite-descriptors of environment. The implications of G x E on breeding decisions are discussed. Breeders should select genotypes on production traits within environmental conditions comparable to where candidate animals are intended to perform. [less ▲]

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See detailGenotype x Climate interactions for protein yield using four European Holstein Populations
Hammami, Hedi ULg; Carabaño, Maria-Jesus; Logar, Betka et al

Conference (2014)

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See detailGenotype x Climate interactions for protein yield using four European Holstein Populations
Hammami, Hedi ULg; Carabaño, Maria-Jesus; Logar, Betka et al

in Proceedings of the 10th World Congress on Genetics Applied to Livestock Production (2014)

Reaction norm models were applied to investigate genetic variation in heat tolerance of Holsteins across environments using long term protein milk yield test-day records and weather variables as proxy of ... [more ▼]

Reaction norm models were applied to investigate genetic variation in heat tolerance of Holsteins across environments using long term protein milk yield test-day records and weather variables as proxy of climate change. Data represented four European regions characterized by different management systems and environments. Daily protein yield changed across the trajectory of temperature humidity index (THI) for all studied populations, pointing out negative associations between warm conditions and cow performance. For most regions, additive genetic variances for daily protein yield decrease when THI increases. Antagonistic relationships between level and intercept were relatively limited for Slovenia compared to the three other regions. Rank correlations of estimated breeding values for three proposed heat tolerance measures ranged from 0.56 (Spain and Slovenia) to 0.81 (Walloon Region of Belgium and Luxembourg), indicating a possibility of genotype by environment (G x E) for some pairs of regions. [less ▲]

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See detailGenotype x environment interaction for milk yield in Holsteins using Luxembourg and Tunisian populations.
Hammami, Hedi ULg; Rekik, Boulbaba; Soyeurt, Hélène ULg et al

in Journal of Dairy Science (2008), 91(9), 3661-71

Test-day (TD) milk yield records of first-lactation Holstein cows in Luxembourg and Tunisia were analyzed using within-and between-country random regression TD models. Edited data used for within-country ... [more ▼]

Test-day (TD) milk yield records of first-lactation Holstein cows in Luxembourg and Tunisia were analyzed using within-and between-country random regression TD models. Edited data used for within-country analysis included 661,453 and 281,913 TD records in Luxembourg and Tunisia, respectively. The joint data included 730,810 TD records of 87,734 cows and 231 common sires. Both data sets covered calving years 1995 to 2006. Fourth-order Legendre polynomials for random effects and a Gibbs sampling method were used to estimate variance components of lactation curve parameters in separate and joint analyses. Genetic variances of the first 3 coefficients from Luxembourg data were 46 to 69% larger than corresponding estimates from the Tunisian data. Inversely, the Tunisian permanent environment variances for the same coefficients were 52 to 65% larger than the Luxembourg ones. Posterior mean heritabilities of 305-d milk yield and persistency, defined as estimated breeding values (EBV) at 280 days in milk-EBV at 80 days in milk, from between-country analysis were 0.42 and 0.12 and 0.19 and 0.08 in Luxembourg and Tunisia, respectively. Heritability estimates for the same traits from within-country analyses, mainly from the Tunisian data, were lower than those from the joint analysis. Genetic correlations for 305-d milk yield and persistency between countries were 0.60 and 0.36. Product moment and rank correlations between EBV of common sires for 305-d milk yield and persistency from within-country analyses were 0.38 and 0.41 and 0.27 and 0.26, respectively. Differences between genetic variances found in both countries reflect different milk production levels. Moreover, low genetic and rank correlations suggest different ranking of sires in the 2 environments, which implies the existence of a genotype x environment interaction for milk yield in Holsteins. [less ▲]

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See detailGenotypic and phenotypic charactérisation of methicilin-resistant Staphylococcus aureus (MRSA) isolated from milk of bovine mastitis
Bardiau, M; Yamazaki, K; Duprez, Jean-Noël ULg et al

in Letters in Applied Microbiology (2013)

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See detailGenotypic and phenotypic characterisation of methicillin-resistant Staphylococcus aureus (MRSA) isolated from milk of bovine mastitis
Bardiau, Marjorie ULg; Yamazaki, Kazuko; Duprez, Jean-Noel et al

in Letters in Applied Microbiology (2013)

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See detailGenotypic Characterization of Enteropathogenic Escherichia Coli (Epec) Isolated in Belgium from Dogs and Cats
Goffaux, F.; China, B.; Janssen, L. et al

in Research in Microbiology (2000), 151(10), 865-71

Enteropathogenic Escherichia coli (EPEC) are isolated from man and farm animals but also from dogs and cats. They produce typical histological lesions called 'attaching and effacing' lesions. Both plasmid ... [more ▼]

Enteropathogenic Escherichia coli (EPEC) are isolated from man and farm animals but also from dogs and cats. They produce typical histological lesions called 'attaching and effacing' lesions. Both plasmid and chromosomal elements are involved in the pathogenesis of EPEC infection. The presence of these genetic elements was investigated in 14 dog and three cat EPEC isolates. A bfpA-related gene was detected in five of the 17 isolates in association with high molecular weight plasmids, and a locus of enterocyte effacement (LEE) was present in all isolates. The LEE was inserted in the selC region in only 12% of the isolates. The eae, tir, espA and espB genes were analyzed by multiplex PCR. The results indicated the presence of those genes in the tested isolates with heterogeneity in the gene subtypes present: eae gamma-tir alpha-espA alpha-espB alpha (65%), eae beta-tir beta-espA beta-espB beta (29%), eae alpha-tir alpha-espA alpha-espB alpha (6%). Moreover, the espD gene was also present in dog and cat EPEC. The DEPEC and CEPEC form a heterogeneous group and five of them are closely related to human EPEC. [less ▲]

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See detailGenotypical and phenotypical characterization of potential virulence of intestinal avian Escherichia coli strains isolated in Algeria
Mellata, M.; Bakour, R.; Jacquemin, E. et al

in Avian Diseases (2001), 45

In order to characterize potential pathogenic Escherichia coli strains isolated from diarrheic hens and chickens originating from intensive battery rearing in North Algeria, the presence of a large range ... [more ▼]

In order to characterize potential pathogenic Escherichia coli strains isolated from diarrheic hens and chickens originating from intensive battery rearing in North Algeria, the presence of a large range of virulence factors and markers was studied in 50 strains by DNA-DNA hybridization on colonies and phenotypic tests. The sequences we focused on were those coding for adhesins F5, F41, F17, Pap, Afa, and Sfa; intimin Eae; and toxins STa, STb, LT1, Stx1, Stx2, CNF1, and CNF2. The phenotypes explored were the colicins, aerobactin, hemolysins, and hemagglutinin production and serum resistance. The genotypic and phenotypic tests enabled us to categorize the isolates into two distinct groups: those with a potential to invade the host (27 strains were serum resistant and/or produced aerobactin), among which three strains were also potentially diarrheagenic, one strain was LT1 + F17+ Afa+ Pap+ (enterotoxigenic E. coli) and the two others were Stx1 (verotoxigenic E. coli). Twenty-three strains were colicinogenic, including 19 strains producing colicin V. This latter factor was also detected in isolates negative for the other virulence factors. On the basis of the type of erythrocytes agglutinated, we established 14 mannose-resistant hemagglutination patterns among the 37 strains tested, including 22 serum-resistant and/or aerobactin producing strains and 15 strains negative for these two characters. None of the strains produced alpha hemolysin, whereas two strains produced beta hemolysin and enterohemolysin, respectively. Congo red fixation was observed in 25 strains. No relationship could be detected between Congo red fixation and the presence of other virulence markers, such as serum resistance and aerobactin production. This study shows that among isolates originating from the feces of diarrheic chickens, the proportion of potentially diarrheagenic E. coli strains is low. [less ▲]

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See detailGenotyping panels available in cattle and their properties
Druet, Tom ULg; Zhang, Zhiyan; Coppieters, Wouter ULg et al

in Book of Abstracts of the 61st Annual Meeting of the European Association for Animal Production (2010)

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See detailGenou douloureux de l'enfant sportif
Kaux, Jean-François ULg

Learning material (2011)

Detailed reference viewed: 96 (12 ULg)
See detailLe genou du sauteur : place de l’isocinétisme dans la prise en charge rééducative
Croisier, Jean-Louis ULg

in Actes du 3ème Meeting de Médecine et Traumatologie du Sport (2003, March)

Detailed reference viewed: 67 (0 ULg)
See detailLe genre Clostridium chez les ruminants
Mainil, Jacques ULg

Scientific conference (2005, December)

Detailed reference viewed: 6 (0 ULg)