References of "Houtain, J. Y"
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See detailApparent prevalence of antibodies to Coxiella burnetii (Q fever) in bulk tank milk from dairy herds in southern Belgium
Czaplicki, G.; Houtain, J. Y.; Mullender, C. et al

in Veterinary Journal (2012), 192(3), 529-531

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See detailLe lait de tank, outil fiable pour le diagnostic de la fièvre Q dans un troupeau bovin laitier ?
Czaplicki, G.; Houtain, J. Y.; Mullender, C. et al

in Epidémiologie et Santé Animale (2009), 56

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See detailIncrease of Plasma Ecg Binding Rate after Administration of Repeated High Dose of Ecg to Cows
Drion, Pierre ULg; De Roover, R.; Houtain, J. Y. et al

in Reproduction Nutrition Development (2001), 41(3), 207-215

Equine chorionic gonadotrophin (eCG) is still used to promote follicular growth in cattle and, more recently with an increased frequency of administration, in ovum pick-up protocols. The aim of this ... [more ▼]

Equine chorionic gonadotrophin (eCG) is still used to promote follicular growth in cattle and, more recently with an increased frequency of administration, in ovum pick-up protocols. The aim of this experiment was to verify the possible effect of high frequency of administration on the immune response to eCG. The profiles of eCG binding rate, in the blood of two groups (A, B) of 4 primiparous cross breed beef cows (3-3.5 years old) submitted weekly for 5 to 10 weeks to repeated high doses (1000-2000 IU) of equine chorionic gonadotrophin, are presented in this paper. A sensitive radiometric method was used to detect antibodies in plasma. The profiles clearly indicated a marked increase of eCG binding rate after 3 to 5 injections of the exogenous hormone to the females. The statistical analysis of the results established that treatments induced a significant increase (P < 0.01) in binding rates after 6 and 3 injections in group A and B respectively. These binding rates remained elevated for at least 1 week following the last injection and decreased afterwards. The values of plasma binding rates following repeated eCG administration differed significantly between groups (0.90+/-1.04 and 1.04+/-0.11 for groups A and B before treatment versus 11.77+/-0.92, 6.70+/-0.85 for groups A and B after treatment, P < 0.01) and from one cow to another (P < 0.01) with some cows presenting no significant immune response while others were more reactive against the hormone (at least 3 injections). [less ▲]

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See detailProfil de l'état corporel au cours du post partum chez la vache laitière
Drame, Daour; Hanzen, Christian ULg; Houtain, J. Y. et al

in Annales de Médecine Vétérinaire (1999), 143

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See detailInfluence des facteurs individuels et de troupeau sur les performances de reproduction bovine
Hanzen, Christian ULg; Houtain, J. Y.; Laurent, Y. et al

in Annales de Médecine Vétérinaire (1996), 140

Through a wide review of the litterature (330 references), the authors have tried to describe the determinant or predisposing effects of factors usually involved in the reproduction problems in beef or ... [more ▼]

Through a wide review of the litterature (330 references), the authors have tried to describe the determinant or predisposing effects of factors usually involved in the reproduction problems in beef or dairy cattle. These factors have been qualified as individual or herd factors. The first ones involve the animal itself like age, genetic, milk production level, dystocia, twinning, perinatal mortality, placental retentio, milk fever, uterine involution, metritis, post-partum ovarian activity. The second ones concern the environnement of the animal i.e. first insemination policy, oestrus detection, insemination time and technic, nutrition, season, stabulation, herd size or management capacity of the farmer. The authors conclude to the multifactorial etiology of the reproduction pathologies. It also appears necessary to develop data collection systems like herd health management programs. Such systems should be able to offer to the practitionner the opportunity to be involved more efficiently in the economic health of the herd using epidemiological tools to study the different implied factors. [less ▲]

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