References of "Guyot, Hugues"
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See detailLe diagnostic des carences en Iode et Sélénium chez les bovins
Guyot, Hugues ULg; Rollin, Frédéric ULg

in Annales de Médecine Vétérinaire (2007), 151

Selenium and iodine deficiencies are frequently present in cattle in Europe with a negative impact on animal health, reproduction and production. Deficiencies in animals also influence human health owing ... [more ▼]

Selenium and iodine deficiencies are frequently present in cattle in Europe with a negative impact on animal health, reproduction and production. Deficiencies in animals also influence human health owing to consumption of their products. These deficiencies must be correctly diagnosed in order to avoid lack of diagnosis or wrong diagnosis. Since there are many interactions between nutrients, a nutritional approach only is of limited interest. Therefore, the diagnosis based on samples obtained on the animals is more reliable. Clinical signs of selenium and iodine deficiencies are rarely pathognomonic. Laboratory analyses are thus necessary to confirm the diagnosis. The present review relates the principal clinical signs of selenium and iodine deficiencies and the confirmation of the deficiency by the measurements of different nutritional and functional markers available for cattle, either on blood, milk, urine or tissues. Finally, a protocol for the diagnosis of selenium and iodine deficiencies is proposed [less ▲]

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See detailRespiratory distress syndrome in full-term newborn calves
Rollin, Frédéric ULg; Danlois, Fabien; Aliaoui, Hamani et al

Conference (2007)

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See detailFièvre Catarrhale Ovine chez les ruminants. Description clinique des cas vécus dans le Nord de l’Europe durant l’été-automne 2006
Guyot, Hugues ULg; Mauroy, Axel ULg; Thiry, Etienne ULg et al

in Bulletin des GTV (2007)

La fièvre catarrhale ovine (FCO) a été identifiée au Nord de l’Europe le 14 août 2006. L’Allemagne, la Belgique, les Pays-Bas et, dans une moindre mesure, le Grand-Duché de Luxembourg et la France ont été ... [more ▼]

La fièvre catarrhale ovine (FCO) a été identifiée au Nord de l’Europe le 14 août 2006. L’Allemagne, la Belgique, les Pays-Bas et, dans une moindre mesure, le Grand-Duché de Luxembourg et la France ont été affectés. Le sérotype 8 du virus de la FCO (exotique) a rapidement été identifié ainsi qu’un vecteur, Culicoides dewulfi, une espèce indigène du Nord de l’Europe. La maladie s’est rapidement développée et au 1er février 2007, on recensait 2137 foyers de FCO, toutes espèces de ruminants confondues. Globalement, la maladie a affecté davantage les bovins (54 %) que les ovins (46 %). Les signes cliniques le plus fréquemment observés chez les bovins étaient des lésions sur le museau et la cavité buccale (ulcérations/croûtes), de la salivation et des boiteries chez des animaux adultes. La morbidité et la mortalité animales étaient respectivement de maximum 5 % et 1 %. Les principaux signes cliniques rencontrés chez le mouton étaient également des lésions sur le museau et la cavité buccale (ulcérations/croûtes), de l’amaigrissement et des boiteries. La morbidité et la mortalité animales étaient respectivement de maximum 12 % et 6 %. Les signes cliniques n’étant pas pathognomoniques et le diagnostic différentiel relativement vaste, seul un examen de laboratoire permet de poser un diagnostic de certitude. [less ▲]

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See detailCongenital muscular dystonia (CMD): a new congenital pathology in Belgian Blue calves
Vandeputte, Sébastien ULg; Brihoum, Mounir ULg; Hubin, Xavier et al

Conference (2006, October 15)

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See detailFully automated heart rate variability assessment in dairy cows
Janda, Jozef; Guyot, Hugues ULg; Sandersen, Charlotte ULg et al

in Acta Physiologica (2006, May), 187(Suppl 651), -16

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See detailCombined spastic paresis of both gastrocnemius and femoral quadriceps muscles in Belgian blue calves
Janda, Jozef; Uyttenhoef, Aude; Vandeputte, Sébastien ULg et al

Conference (2006)

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See detailBluetongue in northern Europe.
Thiry, Etienne ULg; Saegerman, Claude ULg; Guyot, Hugues ULg et al

in Veterinary Record : Journal of the British Veterinary Association (2006), 159(10), 327

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See detailComparative responses to sodium selenite and Sel-Plex® organic selenium supplements in Belgian Blue cows and calves
Guyot, Hugues ULg; Rollin, Frédéric ULg; Andrieu, Sylvie et al

in Nutritional Biotechnology in the Feed and Food Industries (Alltech’s 22nd Annual Symposium) (2006)

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See detailTools to assess iodine deficiency in calves born from deficient and non deficient dams
Guyot, Hugues ULg; Uyttenhoef, Aude; Lebreton, Pascal et al

Poster (2006)

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See detailRelationship between haptoglobin, serum amyloid A, and clinical status in a survey of dairy herds during a 6-month period
Humblet, Marie-France ULg; Guyot, Hugues ULg; Boudry, Benjamin et al

in Veterinary Clinical Pathology (2006), 35(2), 188-193

Haptoglobin and serum amyloid A are major acute phase proteins in cattle. Dairy cattle often develop pathologic conditions in the peripartum period; acute phase proteins may be useful in their diagnosis ... [more ▼]

Haptoglobin and serum amyloid A are major acute phase proteins in cattle. Dairy cattle often develop pathologic conditions in the peripartum period; acute phase proteins may be useful in their diagnosis. Objectives: The purpose of this study was to compare the accuracy of serum haptoglobin (Hp) and serum amyloid A (SAA) concentrations with clinical health status for diagnosing disease during the peripartum period in dairy cattle. Methods: Dairy cows from 4 herds were evaluated every 15 days over a 6-month period. Health status was determined by thorough clinical examination. Haptoglobin and SAA concentrations were measured in serum using validated methods and the results were classifed as positive or negative based on defined cutoff points. Disease prevalence, sensitivity, and specificity were compared using clinical examination as the gold standard. Results: A total of 1896 samples from 158 cows were analyzed. Significant increases in mean Hp and SAA concentrations were observed in the week following parturition in both primiparous and multiparous cows, although high interindividual variability was observed. Both Hp and SAA had low sensitivity but higher specificity in determining disease status compared with clinical examination. Increased concentrations of Hp and SAAwere found in ,10% of samples from clinically healthy cows, except in the week after parturition. Conclusions: Haptoglobin and serum amyloid A should be used with caution as markers of inflammation in the week after calving. Poor sensitivity in other postpartum periods could be related to the higher incidence of chronic (vs acute) inflammation. Haptoglobin may be appropriate for routine screening, but further work needs to be done to assess its value as an indicator of herd health. [less ▲]

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See detailRespiratory Distress Syndrome in full-term newborn calves: clinical, laboratory and post-mortem findings
Rollin, Frédéric ULg; Danlois, Fabien; Aliaoui, Hamani et al

in Proceedings of the 23rd ACVIM (2005)

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See detailEmergence of bovine Ehrlichiosis in Belgium
Guyot, Hugues ULg; Vandeputte, Sébastien ULg; Sandersen, Charlotte ULg et al

Conference (2005)

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See detailLa maladie de Mortellaro : un défi de plus en race blanc-bleu belge
Guyot, Hugues ULg

Conference (2005)

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See detailCase report : A suspicion of cortico-cerebral necrosis in a Belgian Blue herd after ingestion of moulded silage
Guyot, Hugues ULg; Sandersen, Charlotte ULg; Aliaoui, Hamani et al

Poster (2004)

After ingestion of moulded beet pulp silage, cases of cortico-cerebral necrosis (CCN) and mortalities have been observed in a Belgian Blue (BB) herd. Contamination with Paecilomyces spp., a mould that ... [more ▼]

After ingestion of moulded beet pulp silage, cases of cortico-cerebral necrosis (CCN) and mortalities have been observed in a Belgian Blue (BB) herd. Contamination with Paecilomyces spp., a mould that produces byssochlamic acid, malformins and patulin, has been proven. Among these toxins, patulin is known to have cancerogenic, immunosuppressive and tremorgenic effects, but also acts on the respiratory and digestive systems. Twenty-five days after progressive introduction of beet pulp silage into the ration of a dual purpose BB herd, most of the animals showed diminished appetite, salivation and decreased milk production. All 35 cows were reluctant to consume the beet pulp silage, but continued to eat grass silage voluntarily. Seven of them showed anorexia and nervous symptoms, like head pressing and blindness. Four animals died within 1 week after onset of neurological symptoms. No necropsy has been performed, since legislation does not allow post-mortem examination of the central nervous system in the field. The three survivors had been treated successfully with thiamine (10 mg/kg, IV, TID) and recovered completely within five days. After the beet pulp silage had been identified as causative agent, it had been removed from the animals’ ration and no more clinical case has been observed. Four weeks later, the same beet pulp silage has been reintroduced into the animals’ ration and provoked again diminished appetite, salivation and a decrease in milk production in most of the animals. Clinical signs were also suggesting lead poisoning but any contact with lead containing material could have been excluded. Silage was obviously moulded and analysis revealed the presence of 1.6 million CFU Paecilomyces spp./g of silage. Although no further investigation has been made to identify the mycotoxins, an intoxication with patulin has been suspected, since other mycotoxins produced by these species are less toxic. Although it has not been described that CCN can be induced by ingestion of Paecilomyces spp., it seems that there is a close relation between ingestion of Paecilomyces-contaminated silage and observed clinical signs in this herd. [less ▲]

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See detailStudy of the role and origin of endotoxemia in the pathogenesis of respiratory distress syndrome in the newborn calf.
Aliaoui, Hamani; Danlois, Fabien; Guyot, Hugues ULg et al

Poster (2004)

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