References of "Rollin, Frédéric"
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See detailField investigation of subacute rumen acidosis prevalence in walloon dairy herds
Lessire, Françoise ULiege; Knapp, Emilie ULiege; Theron, Léonard ULiege et al

Poster (2013, June 24)

Subacute ruminal acidosis (SARA) has been considered as a major metabolic disease in high producing dairy herds for years. However, different feeding practices However, different feeding practices and ... [more ▼]

Subacute ruminal acidosis (SARA) has been considered as a major metabolic disease in high producing dairy herds for years. However, different feeding practices However, different feeding practices and herd’s production levels are found in Wallonia. SARA prevalence in local herds was thus required 174 cows (164 Holstein and 10 Brown Swiss) out of 24 walloon herds were sampled from 2011 to 2012 for evaluation of their ruminal function. Selection of minimum 5 cows per herd was made on basis of days in milk (<150 DIM), or low milk fat % (F <3.2%), or fat/protein % (F/P≤1), or at farmer’s request (animal debilitated or chronically ill). Ruminal fluid was sampled 4-8 h after feeding using a Geishauser oro-pharyngeal probe, preventing saliva contamination. pH was measured by a portable pHmeter and values were reduced by 0.35 as proposed by Duffield (2004) because of the higher pH values in reticulum sampling site compared with rumenocentesis. Redox potential was determined by Methylene Blue Reduction Time (MBRT) and protozoa assessed by microscopy. Production values were obtained by the National Dairy Herds Improvement. Health scores were determined as described by Zaaier et al. (2001). RESULTS Mean production values ± SD of these animals (DIM: 106 ± 84) were 33.2 ± 8.9 kg milk, F = 3.47 ± 0.72%, P = 3.25 ± 0.25%, F/P = 1.07 ± 0.23. Mean BCS was 2.6 ± 0.6. Mean pH value ± SD was 6.50 ± 0.42. 10 animals (5.7%) from 6 herds were below 5.8, of which 4 cows from H8 (23 sampled cows). No result was < 5.5. MBRT was 4.16 ± 3.13 min. In 5 cows, value < 1min indicated a more amylolytic bacterial flora. In 24 samples, no reduction of MB occurred, demonstrating bacterial inactivity. Disappearance of large protozoa was observed in 6 samples, of which 5 abnormal specimens came from H8. No correlation between low pH values and F/P or %F could be found. CONCLUSION In no herd, prevalence was >25%, required for SARA diagnosis. Regarding these results, prevalence of SARA appears very low in Wallonia while on the opposite, ruminal flora inactivity seems far more common. [less ▲]

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See detailInvestigation of biological markers to evaluate the adaptation of the newborn Belgian Blue calf to the extrauterine life. A pilot study.
Ronzoni, Anna ULiege; Theron, Léonard ULiege; De Marchin, Emmanuelle et al

in Dalin, Göran (Ed.) 15th International Conference on Production Diseases in Farms Animals, Book of Abstracts (2013, June)

Adaptation to extrauterine life and immunity transfer at calving are more at stake when dealing with highly productive breeds such as the Belgian Blue Cattle Breed (BBCB). The purpose of the present pilot ... [more ▼]

Adaptation to extrauterine life and immunity transfer at calving are more at stake when dealing with highly productive breeds such as the Belgian Blue Cattle Breed (BBCB). The purpose of the present pilot study was to evaluate different blood markers, from the birth to the first week of life in BBCB calves, in order to investigate fundamental aspects of the adaptation to the extrauterine life as passive immunity transfer and early energy metabolism. Eighty calves coming from 10 different farms located in Wallonia (Belgium) were enrolled. A clinical examination was performed to verify viability and maturity at birth. Blood samples were collected at birth, day 1 and day 3 to 7. Passive immunity transfer analysis included serum and colostrum immunoglobulin G (IgG) concentration, and plasmatic selenium concentration (Se). Glycemia, serum insulin and cortisol concentration have been considered for the energy metabolism analysis. The data collected were statistically analysed using logistic regression and unpaired t-test. All calves were born alive, viable and mature by caesarean section. Mortality rate was 0% at one week and 5% at three months. Only 33% of calves had an IgG concentration >16g/L after one week of age, while only 34% of colostra had an IgG concentration >70g/L. Glycemia and serum insulin concentration at birth were significantly lower than other breeds, and plasmatic selenium concentration were coherent with low supplemented dams. We compared calves across IgG concentration classes (>16 g/L vs <16g/L). The crosssectional analysis of the risk of FPT when given low IgG concentration colostra has shown a non significant odd ratio (OR 1,058 and 0,39116 g/L) (p<0,001). No significant difference has been shown between cortisol and glycemia (p=0,3) nor insulin and glycemia (p=0,2) at birth. These data suggest a significant difference in BBCB calves on several metabolic markers, but they also revealed that immunity transfer and micronutrition of pregnant hyper-productive dams remain a challenge in modern farms. [less ▲]

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See detailTowards a better understanding of the respiratory distress syndrome in full-term newborn calves
Rollin, Frédéric ULiege; Guyot, Hugues ULiege

in XVIII Congreso Internacional Anembe de Medicina Bovina (2013, April)

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See detailTrace Minerals Management in Cattle
Rollin, Frédéric ULiege; Guyot, Hugues ULiege

in XVIII Congreso Internacional Anembe de Medicina Bovina (2013, April)

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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 ULiege; Tabaran, F; Cassart, Dominique ULiege et al

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

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

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

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

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 detailDoes feeding dairy cattle with different levels of condensed distillers solubles (Protiwanze®) increase the risk of Sara?
Lessire, Françoise ULiege; Rollin, Frédéric ULiege

Poster (2011, September 08)

INTRODUCTION The objective of this study was to evaluate the effects of different levels of Protiwanze® (PW) supplementation, a highly acid (pH = 3.8 ± 0.8) and fermentescible CDS, on ruminal function of ... [more ▼]

INTRODUCTION The objective of this study was to evaluate the effects of different levels of Protiwanze® (PW) supplementation, a highly acid (pH = 3.8 ± 0.8) and fermentescible CDS, on ruminal function of dairy cows. MATERIAL AND METHODS PW supplementation was tested in 5 dairy herds (144 cows, DIM: 96 ± 61, daily milk production: 34.69 ± 8.22 L). In Herd 1, TMR was supplemented with 0% or 10% of PW on a dry matter basis for 4 weeks including a 7-day transition period. Each concentration was distributed twice during 2 periods alternatively with the other one, each cow being its own control. PW concentrations were 10 and 15% in Herd 2, 3 and 4. During every period, milk production was measured by the Dairy Herd Improvement and ruminal fluid sampled by a stomach tube (Ruminator®) on 5 cows. Samples were assessed for pH (portable pH meter), redox potential (Methylene blue test) and protozoa (optical microscopy). RESULTS AND CONCLUSION Ruminal pH values ranged between 5.94 and 7.74. Even when a correction factor of 0.5 was applied to take into account possible saliva contamination, only 8 pH samples pleaded for SARA although protozoa and methylene blue tests were within norms and cows clinically normal. No significant correlation between pH value, milk production and fat content could be demonstrated. Ruminal pH did neither significantly differ between the different levels of PW supplementation. In conclusion, in this study, PW could be used in dairy cows TMR at a level as high as 15% without increasing the risk of SARA. [less ▲]

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See detailUpdate on Bovine neonatal pancytopenia non Pregsure cases
Theron, Léonard ULiege; Rollin, Frédéric ULiege; Hanzen, Christian ULiege et al

Conference (2011, September 07)

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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 ULiege; Alves de Oliveira, Laurent; Ramery, Eve ULiege 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 detailSigns of neurotoxicity in a Belgian Blue herd after ingestion of moulded silage
Guyot, Hugues ULiege; Sandersen, Charlotte ULiege; Brihoum, Mounir ULiege 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 detailComparison of Four Refractometers for the Investigation of the passive transfer in Beef Calves
Vandeputte, Sébastien ULiege; Detilleux, Johann ULiege; Rollin, Frédéric ULiege

in Journal of Veterinary Internal Medicine (2011), 25

Background: Failure of passive transfer (FPT) in beef calves can be detected by refractometry. Nevertheless, different models of refractometers are available, and few studies compare them for the ... [more ▼]

Background: Failure of passive transfer (FPT) in beef calves can be detected by refractometry. Nevertheless, different models of refractometers are available, and few studies compare them for the detection of FPT. Objectives: To compare the accuracy of 4 different refractometers for measuring serum total protein concentrations in comparison with results obtained by the biuret method and, based on the serum IgG threshold of 1,600 mg/mL, to determine, for each refractometer, the optimal serum protein concentration’s lowest threshold for successful passive transfer. Animals: One hundred and eight healthy beef calves, 3–8 days of age. Methods: Observational study. The concentrations of serum total proteins were determined with 4 different models of refractometers and compared with the biuret method by a Bland–Altman statistical method. The optimal serum protein concentration’s lowest threshold for successful passive transfer was determined for each refractometer by receiver operating characteristic (ROC) analysis. In addition, the serum immunoglobulin G (IgG) concentration was compared with the serum gamma-glutamyl transferase (c-GT) activity and with the total immunoglobulin concentration. Results: The refractometric measurements were highly correlated with those obtained by the biuret method. Serum total protein concentration threshold values of 56, 58, 54, and 56 g/L were found respectively for the Atago, Atago ATC, Wolf ATC, and digital ATC refractometers. Immunoglobulins were highly correlated with IgG, whereas Gamma-GT only reflected colostrum uptake by the calf. Conclusions and Clinical Importance: All refractometers could be used for the assessment of passive transfer using their individual serum protein concentration threshold. [less ▲]

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See detailClinical evaluation of cardiac effects of experimental doxycycline overdosing in healthy calves
Brihoum, Mounir ULiege; Rollin, Frédéric ULiege; Desmecht, Daniel ULiege et al

in Biomedcentral Veterinary Research (2011), 7

Background Cardiac morphologic and functional changes consistent with cardiomyopathy have been reported in field cases of calves with accidental doxycycline overdosing. The purpose of this study was to ... [more ▼]

Background Cardiac morphologic and functional changes consistent with cardiomyopathy have been reported in field cases of calves with accidental doxycycline overdosing. The purpose of this study was to evaluate clinically the cardiac effects of an experimentally-induced doxycycline overdosing in healthy calves. Twelve 2 months-old healthy Belgian Blue calves were studied. Six of them (group 1) received the normal dose (5 mg/kg, BID) and the six others (group 2) received five times the normal dose (25 mg/kg, BID) of oral doxycycline for five consecutive days (D1 to D5). Each calf was clinically examined daily. Measurement of serum AST, CK, Iso-CKs and LDH activities and an echocardiographic examination were performed before (D0) and one day after (D6) the last doxycycline administration. An ECG tracing was recorded at D0, D4, and D6. Results In both groups, no clinical, blood, echocardiographic or electrocardiographic changes suggestive of a cardiomyopathy were observed. Only a decreased appetite was observed in the calves of the group 2 between D3 and D6. Conclusions This trial failed to reproduce cardiac changes reported in accidental doxycycline-poisoning in calves, suggesting that high doses of doxycycline may not be the only etiologic factor of the cardiomyopathy reported in the field cases. [less ▲]

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See detailEmergence of bovine ehrlichiosis in Belgian cattle herds
Guyot, Hugues ULiege; Ramery, Eve ULiege; 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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See detailUn nouveau syndrome hémorragique inexpliqué chez le bovin- la Pancytopénie néonatale bovine
Theron, Léonard ULiege; Galland, Bruno ULiege; Vogin, Nathalie et al

Conference (2010, November 21)

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See detailEvaluation of a Bovine Concentrated Lactoserum for Preventing Neonatal Diarrhoea in Belgian Blue Calves
Vandeputte, Sébastien ULiege; Rollin, Frédéric ULiege; Guyot, Hugues ULiege et al

in Open Veterinary Science Journal (The) (2010), 4

The purpose of this study was to evaluate, under field conditions, the efficacy of an european registered bovine concentrated lactoserum (Locatim) in 3 farms with neonatal diarrhoea in calves. A total of ... [more ▼]

The purpose of this study was to evaluate, under field conditions, the efficacy of an european registered bovine concentrated lactoserum (Locatim) in 3 farms with neonatal diarrhoea in calves. A total of 117 healthy Belgian Blue (BB) calves were allocated in 2 groups. Two thirds of the calves received Locatim orally immediately after birth and maternal colostrum one hour later (treated group), while control calves only received maternal colostrum. Every day during 14 days, mental status, faeces consistency, suckling reflex and hydration status of each calf were monitored. Individual blood samples were assessed for passive transfer and specific Escherichia coli antibodies against strains F5, CS31A, F17 and F41. Faecal samples from diarrheic and non diarrheic calves were analysed for rotavirus, bovine coronavirus, Cryptosporidium parvum and Escherichia coli F5. Locatim had no significant effect on the onset, duration and incidence of diarrhoea. The mean serum IgG concentration of 23.1 ± 7.8 mg/ml indicates a good IgG transfer. Only the CS31A strain titer was significantly higher in the treated group. The major identified causative agent of diarrhoea was C. parvum. In conclusion, Locatim only has a slight effect when IgG transfer is optimal, but could be justified when specific antibodies lacking in colostrum are needed [less ▲]

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See detailUN NOUVEAU SYNDROME HÉMORRAGIQUE INEXPLIQUÉ CHEZ LE BOVIN – LA PANCYTOPÉNIE NÉONATALE BOVINE
Theron, Léonard ULiege; Vogin, Nathalie; Moreaux, Emeline et al

in Antibiothérapies : Santé animale et santé publique (2010, May)

For several decades, the bovine was subject to various hemorrhagic syndromes which causes have historically been found. Since the mid-2000s, a new hemorrhagic syndrome seems to emerge with a significant ... [more ▼]

For several decades, the bovine was subject to various hemorrhagic syndromes which causes have historically been found. Since the mid-2000s, a new hemorrhagic syndrome seems to emerge with a significant epidemiological consistency, suggesting a common etiology, although unknown at present. The affected animals were calves of less than 30 days, of all races born to mothers without specific parity. We noticed a very sporadic disease (1/10.000) but lethal to 99%. The characteristic lesions are multifocal hemorrhages, hyperthermia, melena, we noted medullar aplasia systematically. These calves are vironegative for BTV, enzootic bovine leukosis and BVDV. No viral or bacterial agent could be isolated. It seems that most of these calves were born from dams vaccinated against BVDV. The track of an immune dysfunction is the most serious for the moment. [less ▲]

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See detailDescriptive study of 32 cases of doxycycline-overdosed calves.
Brihoum, Mounir ULiege; Amory, Hélène ULiege; Desmecht, Daniel ULiege et al

in Journal of Veterinary Internal Medicine (2010), 24(5), 1203-10

BACKGROUND: Reports of doxycycline-induced toxicity are limited despite common use of this antibiotic to treat infectious respiratory disorders in calves. OBJECTIVE: To describe previously unreported ... [more ▼]

BACKGROUND: Reports of doxycycline-induced toxicity are limited despite common use of this antibiotic to treat infectious respiratory disorders in calves. OBJECTIVE: To describe previously unreported kidney lesions and diagnostic test results in doxycycline-overdosed calves and to compare these results with other findings reported previously. ANIMALS: Thirty-two calves that presented with adverse effects after receiving high doses of doxycycline as a treatment for mild respiratory disorders. METHOD: Retrospective review of medical records. RESULTS: Clinical examination identified mainly lethargy, dyspnea, cough, tongue paresia or paralysis associated with dysphagia and sialorrhea, tachycardia, tachypnea, and signs of myopathy. Blood analysis indicated increases in creatine kinase, lactate dehydrogenase, aspartate aminotransferase, and sorbitol dehydrogenase activities and increased serum creatinine and urea concentrations. ECG recordings and Doppler echocardiography examination identified ventricular premature beats and a decrease in left ventricular global and systolic function, respectively. Necropsy and histopathology disclosed necrosis of the myocardium, tongue, and some striated muscles, acute renal tubular necrosis, and fatty degeneration or congestion of the liver. CONCLUSIONS: Most of these findings corroborate previous observations made in doxycycline-overdosed calves, and further suggest myocardial and striated muscular toxicity as well as renal toxicity in doxycycline-overdosed calves. [less ▲]

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