References of "Guyot, Hugues"
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See detailTrace minerals deficiency diagnosis in ruminants
Guyot, Hugues ULg

in Klinkon, Martina; Jezek, Jozica; Staric, Joze (Eds.) Proceedings of the 15th Congress of the International Society for Animal Clinical Pathology & 14th Conference of the European Society of Veterinary Clinical Pathology (2012, July 04)

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See detailGranulomatous meningo-encephalitis caused by Toxoplasma gondii in three bulls, a possible explanation for unexplained sporadic bovine meningo-encephalitis
Theron, Léonard ULg; Tabaran, F; Cassart, Dominique ULg et al

in Revista Portuguesa de Buiatria (2012, June), (Special Edition),

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See detailSuccessful reduction of cholelithiasis in a holstein cow
Lamain, Guillaume; Frisee, Vincent ULg; Ramery, Eve ULg et al

in Cattle Practice (2012), 20(1), 93-98

A pregnant 3.5 year-old high-productive Holstein cow in the third month of lactation showed colic signs, marked anorexia, and stopped milk production. Clinical examination revealed tachypnea, pyrexia and ... [more ▼]

A pregnant 3.5 year-old high-productive Holstein cow in the third month of lactation showed colic signs, marked anorexia, and stopped milk production. Clinical examination revealed tachypnea, pyrexia and the mucous membranes were all congested. Signs of abdominal discomfort were observed, the abdomen was tense and painful; digestive activity was poor. Blood investigations revealed inflammation, cholestasis, and leucocytosis with marked neutrophilia. Trans-abdominal ultrasonography revealed decreased digestive transit and enlarged gall-bladder. Hepatic or biliary involvement was suspected. A right-flank exploratory laparotomy revealed a gallbladder filled with firm and mobile 0.5 to 1cm diameter fluctuant masses. Digital palpation allowed cholelith extraction through the cystic duct into the duodenum. After the surgery, the cow progressively regained a normal appetite and pain signs decreased. Blood samples analysed 10 days after the surgery still showed inflammation but to a lesser extent. Hepatic enzymes were markedly increased, indicating hepatic injury. Three months after the surgery, the cow was healthy and was inseminated. This case report suggests that cholelithiasis may be diagnosed and successfully treated in early stage of the disease in cattle, though this condition is rare in this species. This is the second report of manual cholelith extraction in a cow. [less ▲]

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See detailInvestigation of body condition score and insulin sensitivity (RQUICKY) in downer cow syndrome
Bonvoisin, Marie ULg; Rollin, Frédéric ULg; Lebreton, Pascal et al

in Revista Portuguesa de Buiatria (2012, June), (Special Edition),

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See detailInvestigation of sudden death of calves after epileptic seizures due to hypomagnesaemia and hyperparathyroidism
Chevalier, Marine ULg; Lebreton, Pascal; Garnier, Catherine et al

in Revista Portuguesa de Buiatria (2012, June), (Special Edition),

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See detailVADE-MECUM des mammites bovines
Durel, Luc; Guyot, Hugues ULg; Theron, Léonard ULg

Book published by MED'COM (2012)

La mammite demeure la pathologie la plus préjudiciable à l'élevage des bovins laitiers. C'est une maladie multifactorielle fortement pénalisante pour l'éleveur: baisse de production, baisse de prix d ... [more ▼]

La mammite demeure la pathologie la plus préjudiciable à l'élevage des bovins laitiers. C'est une maladie multifactorielle fortement pénalisante pour l'éleveur: baisse de production, baisse de prix d'achat du lait, réformes anticipées, frais médicaux... Le lait étant par ailleurs au coeur de l'industrie alimentaire, la question de sa qualité reste primordiale et le vétérinaire a un rôle important à jouer. Ce Vade-Mecum des mammites bovines a pour vocation d'être un outil à la disposition du vétérinaire sur le terrain. Il aidera le praticien à analyser la situation pour laquelle il a été appelé, à proposer des solutions adaptées, tout en communiquant les connaissances nécessaires à l'éleveur pour emporter son adhésion et faire évoluer ses pratiques. L'ouvrage est divisé en 11 chapitres interdépendants explorant de façon approfondie chaque aspect du contrôle de la maladie, en s'appuyant sur les données les plus récentes: caractéristiques des mammites, approche clinique du troupeau, bâtiments, système de traite, alimentation et troubles métaboliques, traite, diagnostic étiologique, traitement en lactation, traitement hors lactation, réformes et gestion du troupeau, ou encore biosécurité. Ce livre raisonné et pragmatique trouvera sa place dans tous les véhicules des praticiens. [less ▲]

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See detailA case of hypertrophic osteoarthropathy in a Belgian Blue cow
Guyot, Hugues ULg; Sandersen, Charlotte ULg; Rollin, Frédéric ULg

in Canadian Veterinary Journal = Revue Vétérinaire Canadienne (2011), 52

A 12-year old cow was presented with chronic respiratory disease and lameness. A chronic pleuritis, pneumonia and bronchial carcinoma were found as well as periosteal proliferation on limbs bones ... [more ▼]

A 12-year old cow was presented with chronic respiratory disease and lameness. A chronic pleuritis, pneumonia and bronchial carcinoma were found as well as periosteal proliferation on limbs bones. Ancillary test and necropsy confirmed a combined pathology of pulmonary inflammation and neoplasm and hypertrophic pulmonary osteopathy. [less ▲]

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See detailKyste hématique valvulaire chez une vache Holstein
Lamain, Guillaume ULg; Ramery, Eve ULg; Guyot, Hugues ULg

in Point Vétérinaire (2011), 320

Une vache laitière haute productrice est présentée pour une fièvre récidivante. L’animal présente des symptômes cardiaques et digestifs. Un phénomène inflammatoire et une atteinte cardiaque sont mis en ... [more ▼]

Une vache laitière haute productrice est présentée pour une fièvre récidivante. L’animal présente des symptômes cardiaques et digestifs. Un phénomène inflammatoire et une atteinte cardiaque sont mis en évidence. Une endocardite bactérienne est suspectée. L’autopsie de la vache révèle l’existence d’un kyste hématique sur la valve tricuspide et une péritonite localisée ayant pour point de départ un abcès périruménal. [less ▲]

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See detailSuccessful reduction of cholelithiasis in a Holstein cow
Lamain, Guillaume ULg; Frisee, Vincent ULg; Ramery, Eve ULg et al

Poster (2011, September)

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See detailAccuracy of inflammation field tests in cattle practice
Guyot, Hugues ULg; Lamain, Guillaume ULg; Detilleux, Johann ULg et al

in Société Belge Francophone de Buiatrie & Vlaamse vereniging voor Buiatrie (Ed.) Proceedings of the 6th European Congress of Bovine Health Management (2011, September)

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See detailTetanus following castration in a buck
Lamain, Guillaume ULg; Guyot, Hugues ULg

Poster (2011, September)

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See detailDevelopment of a scoring system to assess lameness status in dairy cattle farms
Frisee, Vincent ULg; Guyot, Hugues ULg

in Société Belge Francophone de Buiatrie & Vlaamse vereniging voor Buiatrie (Ed.) Proceeding of the 6th European Congress of Bovine Health Management (2011, September)

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See detailOutils diagnostiques des maladies infectieuses utilisables en ferme
Guyot, Hugues ULg; Ramery, Eve ULg

in Point Vétérinaire (2011), N° Spécial: Maladies Infectieuses des Ruminants: Actualités(314), 78-84

La médecine vétérinaire se développe et s’équipe d’outils de terrain précis pour diagnostiquer la présence d’infections voire même d’en déterminer l’agent étiologique. Des tests de terrain ont été conçus ... [more ▼]

La médecine vétérinaire se développe et s’équipe d’outils de terrain précis pour diagnostiquer la présence d’infections voire même d’en déterminer l’agent étiologique. Des tests de terrain ont été conçus pour pouvoir affiner les diagnostics au chevet du patient. Pour savoir si la maladie d’un bovin examiné a une origine infectieuse, on peu recourir à des tests mesurant l’inflammation, des tests indiquant la présence de cellules inflammatoires, des tests mettant en évidence des agents infectieux au sein de prélèvements biologiques et des tests mesurant les conséquences métaboliques du passage d’un agent infectieux. Par ailleurs, des méthodes de diagnostic de terrain ont été développées pour rechercher de manière spécifique des agents infectieux dans les selles (diarrhées), le lait (mammites), l’urine (infections du système urinaire), le sang (parasites sanguins), et enfin dans les poumons (broncho-pneumonies). Par ailleurs, il est possible de prévoir une morbidité et mortalité accrues chez les jeunes veaux en testant le transfert passif de l’immunité colostrale. La recherche d’un diagnostic étiologique en médecine vétérinaire des ruminants conduit à l’établissement de thérapeutiques ciblées. Il ne faut toutefois pas oublier que les laboratoires d’analyse restent les centres de référence pour confirmer la plupart des étiologies des maladies infectieuses chez les ruminants et autres espèces. [less ▲]

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See detailEffect of a combined iodine and selenium supplementation on I and Se status of cows and their calves
Guyot, Hugues ULg; Alves de Oliveira, Laurent; Ramery, Eve ULg et al

in Journal of Trace Elements in Medicine and Biology (2011), 25(2), 118-124

Iodine (I) and selenium (Se) deficiencies are commonly reported in cattle, however, there are also studies regarding a very high iodine supply. The aim of the study was to determine the long-term effect ... [more ▼]

Iodine (I) and selenium (Se) deficiencies are commonly reported in cattle, however, there are also studies regarding a very high iodine supply. The aim of the study was to determine the long-term effect of I and Se supplementation on non-pregnant cows, pregnant cows and their calves. The hypothalamus pituitary axis was investigated (TSH, T4, T3 assays) during a TRH challenge on non-pregnant cows. Twenty-four cows, half of them pregnant, were assigned into 2 diet-groups, one group with a low I (0.45 ppm) and Se (0.15 ppm) diet (LISe), the other with a high I (5.45 ppm) and Se (0.45 ppm) diet (HISe), for a period of 120 days. Nutritional (plasma iodide, urinary I, plasma Se, I content in colostrum and foetal fluids) and functional (thyrotropin, thyroid hormones, glutathione-peroxidase activity in erythrocytes) markers of I and Se status were assayed in dams at regular intervals for 120 days and in their calves at birth. A TRH challenge was performed on 8 non-pregnant cows at day 110 of the trial. At the end of the study, I and Se nutritional markers were higher in dams in the HISe group, compared to the LISe group, except for plasma Se. At birth, I nutritional markers in calves in the HISe group were higher compared to the LISe group. Reactivity of the pituitary–thyroid-axis was not influenced by I and Se supplementation. I and Se supplementation is efficient in improving newborn status. [less ▲]

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See detailCase Report: Two Cases of Ocular form of Listeriosis in Cattle Herds
Guyot, Hugues ULg

in Cattle Practice (2011), 19(1), 61-64

Nowadays, the widespread use of silage has led to an increased frequency of bacterial contamination of Listeria spp in ruminants. The infection of ruminants is essentially linked to the consumption of ... [more ▼]

Nowadays, the widespread use of silage has led to an increased frequency of bacterial contamination of Listeria spp in ruminants. The infection of ruminants is essentially linked to the consumption of silage of poor quality or of milk products. The disease is frequent and severe in ruminants and can be present in various forms: nervous, septicaemic, genital, mastitis and ocular. The ocular form of Listeriosis can serve as a sentinel for the disease at the herd level. In this case report, 2 herds were investigated for calves and adult mortalities. In the first case, a large majority of the calves presented with hypopion but neurological examination of the calves revealed no abnormalities. The majority of the dairy cows also presented with ocular disorders but neurological examination did not reveal any abnormalities. Calves received whole milk from the dairy herd. The dairy herd diet comprised maize and grass silage, and cereals. Listeria monocytogenes was found in milk and grass silage in significant amounts. In the second case, weight loss, abortions and mortalities in adult cattle were reported. Fifty percent of animals examined presented with hypopion, and/or keratoconjunctivitis, and/or uveitis. No neurological abnormality was found. The animals’ ration of was comprised grass and maize silages. The grass silage had poor macroscopical aspect. Analysis revealed the presence of Schizophyllum commune (fungus) and L. monocytogenes in significant amounts. Furthermore, analysis of aborted foetuses also showed L. monocytogenes. Listeria infection in cattle can occur through ingestion of contaminated silage but calves can also be infected throughout the dams’milk. Ocular lesions are not pathognomonic for Listeriosis but, accompanied with abortions and poor quality silage, this can be a major indication for ancillary exams for Listeria monocytogenes at a herd level. [less ▲]

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See detailSigns of neurotoxicity in a Belgian Blue herd after ingestion of moulded silage
Guyot, Hugues ULg; Sandersen, Charlotte ULg; Brihoum, Mounir ULg et al

in Cattle Practice (2011), 19(1), 57-60

After ingestion of moulded beet pulp silage, cases of cerebro-cortical necrosis (CCN) and mortalities were observed in a dual purpose Belgian Blue (BB) herd. Contamination with Paecilomyces spp., a mould ... [more ▼]

After ingestion of moulded beet pulp silage, cases of cerebro-cortical necrosis (CCN) and mortalities were observed in a dual purpose Belgian Blue (BB) herd. Contamination with Paecilomyces spp., a mould that produces byssochlamic acid, malformins and patulin, was proven. Twenty-five days after progressive introduction of beet pulp silage into the ration, most of the animals showed diminished appetite, excessive salivation and decreased milk production. Some of them showed anorexia, head pressing and blindness while 4 animals died within 1 week after onset of neurological symptoms. The survivors had been treated successfully with thiamine and recovered completely within five days. Once the beet pulp silage had been identified as causative agent, it was removed from the animals’ ration and no more clinical cases were observed. Silage was obviously moulded and analysis revealed the presence of 1.6 million CFU Paecilomyces spp./g of silage. Although no further investigation was undertaken to identify the mycotoxins, intoxication with patulin was 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 clinical signs observed in this herd. [less ▲]

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See detailTétanos suite à la castration d'un bouc nain
Lamain, Guillaume ULg; Guyot, Hugues ULg

in Point Vétérinaire (2011), 313

Un cas de tétanos faisant suite à la castration d’un bouc nain est décrit. L’animal présente dans un premier temps du tympanisme ruménal, puis de l’opisthotonos. Une neutrophilie est mise en évidence ... [more ▼]

Un cas de tétanos faisant suite à la castration d’un bouc nain est décrit. L’animal présente dans un premier temps du tympanisme ruménal, puis de l’opisthotonos. Une neutrophilie est mise en évidence. L’administration de sérum antitétanique et de pénicilline est accompagnée d’un traitement symptomatique. L’issue de ce cas est fatale et l’autopsie ne révèle pas de lésion spécifique associée au tétanos. [less ▲]

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See detailLa clinique vétérinaire de l'ULg: un partenariat méconnu entre les éleveurs et les vétérinaires
Guyot, Hugues ULg

Article for general public (2011)

La clinique vétérinaire universitaire (CVU) de l'Université de Liège comporte un département s'occupant plus particulièrement de l'Elevage (ruminants et porcs): le DCP (département clinique des animaux de ... [more ▼]

La clinique vétérinaire universitaire (CVU) de l'Université de Liège comporte un département s'occupant plus particulièrement de l'Elevage (ruminants et porcs): le DCP (département clinique des animaux de production). Ce département a des missions d'enseignement, de recherche et de services. Parmi les services, citons la clinique des ruminants (cas référés), les Audits diagnostics et suivis en ferme (ruminants et porcs) et la Clinique Ambulatoire (diagnostic uniquement). [less ▲]

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See detailEmergence of bovine ehrlichiosis in Belgian cattle herds
Guyot, Hugues ULg; Ramery, Eve ULg; O'Grady, Luke et al

in Ticks and Tick-borne Diseases (2011), 2

Bovine ehrlichiosis is a tick-borne rickettsial disease caused by Anaplasma phagocytophilum. The disease can also be transmitted to humans. Outbreaks in cattle have been described in many European ... [more ▼]

Bovine ehrlichiosis is a tick-borne rickettsial disease caused by Anaplasma phagocytophilum. The disease can also be transmitted to humans. Outbreaks in cattle have been described in many European countries. In Belgium, infections caused by Anaplasma phagocytophilum have been reported in humans and dogs; however this paper details the first report of ehrlichiosis in cattle herds in Belgium. The first case described was in a dairy herd located in east Belgium. Clinical signs included hyperthermia, polypnea and swelling of the limbs. The other case was diagnosed in a second, mixed purpose, herd in west Belgium. Within the second herd all of the affected animals came from the same pasture. All animals in that pasture showed recurrent hyperthermia and some also showed signs of mastitis and late-term abortions. Blood smears and serology revealed the presence of Anaplasma phagocytophilum in the majority of animals with pyrexia. Furthermore, the presence of leptospirosis, Neospora caninum and Q fever antibodies was tested by serological analysis but all results were negative. Paired serology for Adenovirus, BHV-4, BHV-1, BVD, PI3 and RSV-B did not show any significant seroconversion. Milk samples from cows affected by mastitis revealed minor pathogens. Fecal testing for the presence of Dictyocaulus viviparus in the first herd was negative. Recurrent pyrexia in pastured cattle is a non-specific sign, and can be related to several different pathogens. Bovine ehrlichiosis is transmitted by the tick species Ixodes ricinus which is known to be present throughout Belgium. Belgian practitioners should include ehrlichiosis in their differential diagnosis when confronted with pastured cattle suffering from recurrent pyrexia. [less ▲]

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