Effects de deux glucorticoïdes synthétiques sur le glucose du sang et des sécrétions endométriales chez la vache

Twelve normal cows were injected with 9_αFFAC and with 9_αF, 16_αmF. A marked increase of blood glucose and endometrial secretions glucose was noted up to the postestrus period. A more constant but lower glucose concentration was obtained with 9_αFFAC.     

Toxicité et effet immunosuppresseur de la sulfaquinoxaline chez la poule

Secondary effects of sulfaquinoxaline have been studied by comparing specific antibody titres of treated birds with the titres of those birds which were not treated.

Previously these birds had been immunized by intramuscular injections of a killed antigen of S. pullorum, standard strain, and S. pullorum, variant strain. This experiment demonstrated that this drug possesses an immuno-suppressing action. This secondary effect was confirmed by an experimental infection with the GB strain of Newcastle disease virus.

     

Leucémie lymphoïde chez deux chiens

Lymphoid leukemia in two dogs     

Utilisation d'acétate de mégestrol lors d'arrosage urinaire chez le chat mâle castré

The use of megestrol acetate to stop urine spraying in castrated male cats Four castrated male cats were treated with megestrol acetate because they were showing signs of urine spraying. The dosage used was 5 mg a day for seven days followed by 5 mg every three days for 21 days. The treatment did not exceed one month.     

Prévalence des infections à Salmonella spp. chez les bovins et les équins de l'Hôpital vétérinaire d'enseignement de la Faculté de médecine vétérinaire de l'Université de Montréal.

Bacteriologic detection of Salmonella spp. from feces of animals admitted to Veterinary Teaching Hospital of the Faculty of Veterinary Medicine, University of Montréal, in Saint-Hyacinthe was carried out during a 1-year period to estimate the prevalence of bovine and equine salmonellosis. Prevalence at the time of hospitalization was quite low: 1.4% in cattle and 1.7% in horses. Incidence was 15.1 cases/100 animal/year in cattle and 38.7 cases/100 animal/year in horses. Serotype typhimurium was the most prevalent in both species. In cattle, cases were evenly distributed over the year. In horses, a recrudescence of cases and a obviousness of transmission were apparent in April 1996.     

Présence de la maladie bactérienne du rein chez les salmonidés au Québec

Presence of the bacterial kidney disease in salmonid fish in Quebec During the summers of 1979 and 1980, wild and hatchery fish were analysed for the presence of the bacterial kidney disease (BKD) agent in salmonid fish in Quebec by the indirect immunofluorescence technique. The causative agent of BKD was detected in all hatcheries tested. Ten to 25% of the fish were positive. The presence of this agent was independent of age and species. We were unable to detect the BKD in fish from the rivers in the northern part of Quebec (over the 50th parallel).     

Analyse de la composition du liquide céphalo-rachidien chez le porcelet nouveau-né.

Cerebrospinal fluid composition has been studied in low and normal birthweight piglets. Values for urea, Ca, K, Cl and P did not differ between the two groups. However, glucose concentration was lower in low birthweight subjects and Mg and Na values were higher. Total leukocytes were also higher in low birthweight piglets. These differences may suggest that blood-brain-barrier is not at the same stage of maturation in low birthweight as in normal birthweight subjects.     

Les électrolytes du sang et des sécrétions endométriales de la vache à la suite d'une glucocorticothérapie

The effect of two synthetic glucocorticoids, 9_α-fluoroprednisolone acetate and dexamethasone (9_α-fluoro, 16_α-methylprednisolone) was studied on 12 normally breeding cows. Na, Mg, K, Ca and P concentrations were evaluated in the serum and in the uterine fluid at four stages of the estrous cycle.

No significant changes were noted in Na and Ca concentration in either serum or uterine fluid. On the other hand, significant changes in the Mg, K and P were observed. Both drugs have caused a decrease in the content of Mg in the serum (P<0.05) during diestrus, a fall in the level of uterine K (P<0.01) during proestrus and a decrease of P during proestrus both in serum (P<0.001 after dexamethasone treatment) and in uterine fluid (P<0.001 for both drugs).

It is obvious that the two drugs change the chemical composition of blood and endometrial secretions. This could jeopardize the survival of the spermatozoids and of the ovum as well as the fertilization and the implantation processes.

     

Détermination de la courbe de dissociation standard de l''oxyhémoglobine du cheval et influence, sur cette courbe, de la température, du pH et du diphosphoglycérate.

The equine blood oxyhemoglobin dissociation curve has been traced in its entirety in standard conditions and the effects of temperature, pH and 2,3-diphosphoglycerate on this curve have been measured. When compared to that of human blood, the curve showed a higher oxygen affinity of hemoglobin (23.8 +/- 0.8 versus 26.6 mm Hg). The effect of the pH, expressed by d log P50/dpH, was found to be identical in man and horse (-0.47). The effect of temperature, however, expressed by d log P50/dT, proved to be lower in the horse (0.016 versus 0.024). The P50 showed an increase of 1 mm Hg each time 2,3-diphosphoglycerate was experiencing an elevation of 4 mumol/gHb in the horse. The results obtained from this experiment are intended for the replacement of the values related to the human blood which have been found to be somewhat inadequate for the horse blood, when the data of blood gases are given in algorithms.     

Les protéines totales et leurs fractions dans le sérum et dans les sécrétions endométriales chez la vache atteinte d'infertilité sine materia

Total proteins, albumine and globulins of serum and uterine secretions were evaluated in two groups of 15 normal and 15 repeat breeder cows. Cyclic significant variations of all studied parameters were observed in uterine secretions of normal cows although only total proteins showed the same pattern in repeat breeder cows where individual variations were noted to be very important. Concentrations of total proteins, albumin (P<0.05) and β globulins (P<0.01) were different between the two groups during either the estrous or the postestrous period. Concentration of proteins in uterine fluid was higher in normal breeder cows during postestrus and diestrus.