[Dynamics of clinico-biochemical indicators in cattle with ketonuria during the dry period and after parturition].

The study was performed in eight high-pregnant cows in which medium to high ketonuria was repeatedly detected. The control group consisted of six cows free from ketonuria before parturition. Blood and urine were sampled from the cows two to eight weeks before parturition, on the day of parturition, 24 hours, three to five days and two to six weeks after parturition.

[Trypsin inhibitor activity in the colostrum of cows].

The activity of the colostral trypsin inhibitor (CTI) was studied in seven milkings of colostrum in the course of the first five days after calving in 15 cows. The activity of the total trypsin inhibitor in the colostrum was ascertained in the course of the first two days after calving in ten cows in their second to fourth lactations and also in the colostrum of the first milking after calving in the case of 11 cows. The greatest CTI activity was found in the colostrum of the first milking after calving (301 micrograms X ml-1).

[The effect of the early feeding of solid and bulk foods on the dynamic development of the digestive processes in calves ina large-scale breeding facility].

Digestive activities were studied in test calves (n = 12) in relation to age and feed intake. The calves were isolated after birth from adult cows. Since the 14th day of age, milk replacers were fed with concentrate feed mixture TG and alfalfa hay, i.

[Dynamics of selected biochemical indicators of energy metabolism in calves fed 2 different types of milk diets].

The effect of two milk diets on the changes in selected parameters of energy metabolism was studied in calves. After the termination of colostrum feeding, the experimental group of calves (n = 10) was given whole milk whereas the calves in the control group (n = 10) were given the Laktosan milk replacer. Blood was collected for biochemical investigation from the third day of age (determination of glucose concentration) and from the fourth week of age (evaluation of the parameters of lipid metabolism).

[Utilization of urea nitrogen in young calves].

The influence of an increasing intake of urea in feed rations for calves on its levels in blood plasma and urine, development of health condition, weight gains and on other biochemical characteristics in the blood of calves was studied. The experimental group (n = 4) received urea in feed ration from the 17th day of age, at the beginning in the preparation Syrur, later on (from the 66th day) in the synthetic form only. The feed ration of the control group (n = 3) differed only in the zero content of urea.

[The effect of the use of milk-based feed mixtures and whole milk on the development of selected indicators in the blood plasma in calves].

Two milk feeding systems were investigated as influencing the health and development of calves. After the termination of colostrum feeding, the ten animals of the experimental group were given whole milk whereas the control group (also ten calves) was given the Laktosan milk replacer. By the age of three months, blood was collected from the calves for biochemical examination in weekly intervals, later once a month.

[Selected indicators of colostrum quality in cows over the period of a year].

Under the conditions of large-scale breeding, seasonal changes in the total protein of colostrum whey, gammaglobulins, vitamins A, E, C, and carotene in cow's colostrum from the first milking, were studied in the course of the first 12 months. As indicated by the results of an analysis of 302 colostrum samples, the concentrations of total protein in whey were significantly higher in winter (P less than 0.01) than in the summer season.

[The effect of colostral immunoglobulins on hematological and biochemical indicators in calves].

Haematological values (haemoglobin concentration, haematocrit, erythrocyte and leucocyte number) and the levels of biochemical parameters (plasma concentrations of magnesium, zinc and copper) were studied in dependence on the level of immunoglobulins in calves in the early postnatal period. As a parameter of colostrum intake and quality the immunoglobulin level in blood serum was chosen, according to which the calves (n = 300), aged from two to six days, were divided into four groups. A relationship between the colostrum intake, or the immunoglobulin level in blood serum, and the magnesium concentration in blood plasma was observed.

[Comparison of biochemical parameters in the blood of healthy and diseased calves in a large barn].

In a high-capacity calf-house, twenty-one calves were subjected to repeated clinical and biochemical examination until they were 22 weeks old. For evaluating the health condition of the animals, the calves were divided into two groups, one including healthy animals and the other including those suffering from bronchopneumonia and diarrhoea as the most frequent disorders in high-capacity calf-houses. From four to eight weeks of age, both groups of calves showed low levels of plasma magnesium and iron.

[The effect of long-term feeding of higher doses of urea on clinical and biochemical indicators in sheep].

During feeding 120 g of urea per head/day to four-year wethers for nine months it was observed that for the whole period the animals accepted the feed with appetite, the rumen motility and body temperature were within the physiological standard. In both groups of animals (three animals experimental and three animals control) a higher breathing frequency was found. In experimental (control) animals the levels were as follows: plasma calcium 2.

[The effect of age and training on the ECG time curve of purebred horses].

In 246 horses of the English Thoroughbred breed of several age categories, divided into four test populations, the influence was studied of age and training on the pulse rate and time intervals of ECG (PQ, QRS, QT and QTc). It was found that with the increasing age and training action slowed down gradually. Duration of the atrioventricular path (PQ) is prolonged, time of ventricular activation (QRS) and time of the electrical systole (QT) including its value corrected according to the actual pulse rate (QTC).

[Changes of the clinico-biochemical indices in the rumirid juice and urine in experimental aflatoxicosis of dairy cows].

The health condition and course of fermentation processes in the rumen were studied in four cows of the Red Spotted breed at the age of four to nine years. The clinico-biochemical indices in the rumen liquor and urine were used. The experimental animals were exposed to a mixture of aflatoxins applied in the dose of 200 mg B1 and 80 mg B2.