Description de cas de chondrodystrophie dans trois exploitations de poulets label

in Annales de Médecine Vétérinaire (2000), 144(6), 415-420

The present paper describes chondrodystrophy (perosis) in three poultry units producing labelled chickens. An unilateral deviation of a hind leg along with a tumefaction of the tarsal joint appeared in 4 ... [more ▼]

The present paper describes chondrodystrophy (perosis) in three poultry units producing labelled chickens. An unilateral deviation of a hind leg along with a tumefaction of the tarsal joint appeared in 4-day- to 4-week-old birds; 5 to 50% of the animals were affected. The growth rate was reduced and cachexia was also observed. There were also breast blisters. Chemical analyses were carried out on the poultry feed in two of the units. The manganese content was below the requirements at about 35 mg/kg; in one unit, the ionic balance (Na+K-Cl) was insufficient along with a too narrow Ca/P. The insufficient supply in manganese was corrected by the addition of manganese sulfate in water at a rate of 120 g/litre of water. Manganese sulfate was also added in the feedstuff at a rate of 120 g/ton. [less ▲]

Comparison of the efficacy of 2 vaccination schemes against an experimental infection with a virulent amyxomatous or a virulent nodular Myxoma virus strain

in Journal of Comparative Pathology (2000), 122

Experimental Infection of Specific Pathogen-Free New Zealand White Rabbits with Five Strains of Amyxomatous Myxoma Virus

in Journal of Comparative Pathology (1999), 121(4), 369-84

Myxomatosis is a specific disease of the European rabbit (Oryctolagus cuniculus) due to a virus belonging to the genus Leporipoxvirus. Forty-seven years after its deliberate introduction into Europe, the ... [more ▼]

Myxomatosis is a specific disease of the European rabbit (Oryctolagus cuniculus) due to a virus belonging to the genus Leporipoxvirus. Forty-seven years after its deliberate introduction into Europe, the clinical aspects and the epizootiology of myxomatosis have changed. Two forms (nodular and amyxomatous) of the disease have been identified to date. A comparative study was made of the clinical signs, pathogenesis and gross lesions observed in male specific pathogen-free New Zealand White rabbits inoculated with five strains of amyxomatous myxoma virus. All five strains induced the characteristic amyxomatous myxomatosis clinical syndrome with clinical signs that differed only in intensity. The varying clinical intensity, together with the results of virological examination question the virulence of at least three of the five strains. Genomic analysis confirmed that the five strains came from the Lausanne strain introduced in 1952 in France and not from an unnoticed introduction of a Californian strain of myxoma virus. No link was found between the amyxomatous myxoma virus strains and the SG33 vaccine strain. 1999 Harcourt Publishers Ltd. [less ▲]

L’Entérocolite Epizootique du Lapin

in Annales de Médecine Vétérinaire (1998), 142

Etude clinique et anatomopathologique de l'infection expérimentale de lapins par une souche virale amyxomateuse isolée en Belgique

in Annales de Médecine Vétérinaire (1997), 141

Les maladies virales chez le lapin européen (Oryctolagus cuniculus)

in Annales de Médecine Vétérinaire (1996), 140

Le chaponnage, une technique qui revient à la mode!

in Annales de Médecine Vétérinaire (1996), 140

Comparaison de l'évolution de 2 litières biomaîtrisées à base de sciure ou de paille pour porcs à l'engraissement

in Annales de Médecine Vétérinaire (1994), 138(1), 45-53

Two rooms of a pig house were used to study 2 deep litter systems where the animals were kept on a 50 cm thick layer of sawdust or of chopped straw (10 cm). Seven days before the arrival of the animals ... [more ▼]

Two rooms of a pig house were used to study 2 deep litter systems where the animals were kept on a 50 cm thick layer of sawdust or of chopped straw (10 cm). Seven days before the arrival of the animals, slurry and a microbial product used to stimulate the fermentation were added to the litters. Fifteen pigs on sawdust and seventien pigs on straw (floor spaces : 1.4 and 1.2 M2/pig) were fattened from 23.1 to 93.1 kg live weight. Excreta from pigs was dung into the bedding weekly and treated with the microbial product. This labour was considered as too hard in the straw room and was ended at day 105. No sawdust was added during the fattening period but straw was added 5 times to keep the pigs clean and to keep the temperature in the bedding higher than 30-degrees-C. The mean temperature in the sawdust bed was higher (38 +/- 5,4-degrees-C vs 35 +/- 6,7-degrees-C, p > 0,001) and more constant (mean daily variation 1,3 +/- 1,6 vs 2,2 +/- 2,4-degrees-C, p > 0,001) than the temperature recorded in the straw bed. The air temperature and the relative humidity were similar in the 2 rooms (21-degrees-C and 60 The concentrations of ammonia in the air were measured with Gastec tubes. The average ammonia concentrations recorded during the 7 days before the arrival of the animals (48 +/- 36 ppm vs 12 +/- 9,2 ppm) and those recorded after the eighth day (11 +/- 5,6 ppm vs 6,7 +/- 3,9 ppm) were significantly higher with the straw system compared with the sawdust system. The daily gains were not significantly different in the 2 rooms (552 g on average) and the food conversion ratios in the 2 rooms were 3,6 kg/kg (on sawdust) and 3,85 kg/kg (on straw). Carcasses were of equal quality. In conclusion, results were better with the sawdust bed than with the straw bed. The sawdust bed provided a higher temperature in the bedding and a lower ammonia concentration in the air. The routine weekly task of digging was easier in the sawdust bed and the bedding was used for a second batch. [less ▲]

Quel antibiotique utiliser pour traiter les affections respiratoires antérieures chez le pigeon

in Annales de Médecine Vétérinaire (1994), 138

Etude de l'effet de 2 additifs à base d'extrait de Yucca sur la réduction des émissions d'azote ammoniacal par des lisiers de porcs

in Annales de Médecine Vétérinaire (1993), 137(7), 485-493

The effects of two commercial yucca extracts on the ammonia release from pig slurry have been tested in laboratory and in one fattening house. In laboratory, tests were carried on with 4 litre samples ... [more ▼]

The effects of two commercial yucca extracts on the ammonia release from pig slurry have been tested in laboratory and in one fattening house. In laboratory, tests were carried on with 4 litre samples whose ammonia production was recorded during 35 days. One of the two products, at the factory recommanded dose of 5 g/l, has successfully lowered the ammonia emission rate of the slurry. In the pig house, the two same products were given in the pigs' diet at the dose of 160 and 200 g/ton of feed. Inside a same building, pigs of one room received feed plus yucca extracts and those of the second room feed alone; none of the 2 products has significantly reduced the ammonia concentrations recorded on a three month period. One can expect improvements of the yucca extracts but up to now no guaranty can be given of their efficiency. [less ▲]