In the conditions of the Republic of Belarus there were analyzed high productive traits of meaty calves and cross breeds bred in accordance with a system cow-calf, as well as the possibilities of using veal meat obtained in ecologically safe areas for infant food production. At the age of 6,5-7 months the weight of fresh carcass of bull-calves of sharolez breed in comparison with aberdin-angus х black-motley herdmates was on 41,6 kg (Р less than 0,001) higher, carcass yield and slaughter yield – on 13,8% (Р less than 0,001) and 13,6% (Р less than 0,001), respectively. The fat content in sharolez meat was 4,9% against 8,9%; protein - 21,9% against 18,8%. The black-motley suckling bull-calves surpassed their herdmates which were grown up by technology of dairy cattle breeding at the age of 6-6,5 months according to indexes of weight of fresh carcass - on 16,3 kg or 21,7% (Р less than 0,01); according to indexes in a slaughter yield - on 16,6% (Р less than 0,001); and according to indexes meat flesh in a carcass - on 1,5%. According to quality indexes, amino acid structure, acceptable concentration of toxic elements content, pesticides, antibiotics, radionuclides and other harmful substances the veal meat of calves which were bred on a system a cow-calve in ecologically pure zones proved to be important meat raw materials to produce infant food products.

In the conditions of the Republic of Belarus there were studied the aetiology factors in development of dermatoses of productive cows taking into account the hygienic aspects. Structural defects of floors of cattle livestock buildings in animals of an experimental group promoted higher (on 35%) development of mattery dermhelminthiasis of distal areas of hindlegs in comparison with animals of a control group. Occurrence of skin dermhelminthiasis, especially in distal areas of hindlegs, was caused by various primary traumas of soft parts with the subsequent introduction into them of pathogenic microbial flora. The imperfect design of floors, an unsatisfactory microclimate in cow cattle houses, hypodynamia in the absence of constitutional walk made the preconditions for it. The reasons of purulent dermatosis of cows were two interconnected etiological factors: mechanical damages of tissues and development of a surgical infections in affected areas against the background of unsatisfactory microclimate that led to decrease in dairy efficiency on 4,51%. Therefore in a complex of the actions directed towards the preventive maintenance of surgical diseases, it is necessary to include the strict control over designing, building and operation of cattle-breeding premises, traumatism prevention, creation of an optimum microclimate and observance of zoohygienic norms of cattle maintenance.

In the conditions of the Republic of Belarus taking into consideration the hygienic aspects there were studied the aetiological factors in dermatosis development in productive cows. As a result of realized research it was established that aetiology of skin diseases in the area of a mammary gland were traumas, and following affects were more often marked: skin rhagades of mammillars; wound in the area of a mammary gland and mammillars; fistulas of milk tank vessels; and also sporadic damages of sphincter muscle of teat canal caused by machine milking. This in its turn gives made it possible to consider, that traumas of various character were a contributing factor for occurrence of udder garget - mastitis. In course of the realized analysis there was proved a high therapeutic efficiency of 1% aethonium gel for the treatment of various traumas of mammary gland and udder mammillars of cows. Clinical recovery of animals after administration 1% aethonium gel was stated on 3,2 days earlier, than after administration of Burenushka cream in the postoperative period. Healing and restoring action of 1% aethonium gel for udder tissues was proved by changes in number of somatic cells in milk. The quantity of somatic cells in 7 days after administration of 1% aethonium gel came back to the level which was typical healthy animals, while in the control group the quantity of somatic cells per 1 ml of milk did not decrease essentially.

In the conditions of the Republic of Belarus there were studied biochemical indexes of calf blood serum against the background of application of probiotic preparations Bilavet C. Results of research showed that administration of probiotic preparations from the first day till the six day and from the fourteenth day till the nineteenth day of calf life with the preventive purpose rendered the simulative influence on indexes of natural resistance, which were accompanied with the increasing of total protein quantity in blood on 2,9-5,9%, as well as the increasing of protein fractions, in particular, globulin-rich fraction on 4,2-6,4%. Administration of probiotic preparation Bilavet С to calves rendered the positive influence on blood biochemical indexes, promoted the uptaking and better accumulation of mineral substances: content of crude calcium, inorganic phosphorus, magnesium, iron increased on 15,3%, 10,5%, 13,2% and 3,6%, respectively.

In the conditions of the Republic of Belarus there were studied circadian rhythms of some haemotological and biochemical blood indexes of clinically healthy calves and calves with a respiratory syndrome. There was analyzed the efficiency of administration a new complex mineral preparation CMP for correction of internal desynchronoses in complex therapy of calves with respiratory pathologies. Diseases of calves with a respiratory syndrome were accompanied by infringements of circadian fluctuations rhythm (internal desynchronosis) of haemotological and biochemical blood indexes. Application of an antimicrobial preparation Ampicillin for treatment of respiratory diseases of calves promoted the recovery of calves. Introduction of CМP preparation into therapeutic regimen of calves with respiratory syndrome proved to be rather effective; it promoted the correction of metabolic desynchronoses which accompanied the basic disease. Combined application of CМP and Ampicillin made it possible to speed up the clinical recovery of calves and on 30% to prevent animal mortality.

In the conditions of the Republic of Belarus there was studied a comparative efficacy of methods of drug administration for diseased animals with respiratory diseases. It was stated that enteral (internal) administration of Tromexin in a complex therapy of calves with respiratory pathology possesses rendered low therapeutic efficacy and could have a lethal outcome. Parenteral (intramuscular) administration of Enrotil and Dexafort for a complex therapy of calves with respiratory pathology rendered a moderate therapeutic efficacy and could lead to animal's state improvement. Parenteral (intravenous) administration of hypertonic solutions of norsulfazol, calcium chloride, sodium chloride and glucose in complex therapy of calves diseased with a respiratory pathology proved to render a high therapeutic efficacy and may lead in a complete clinical recovery.

In the conditions of the Republic of Belarus there were determined types of transferrins of 46-day old broiler chickens and their relation with indexes characterizing ferrum transport fund. In broilers of Smena-2 cross there were stated four transferrin phenotypes, which revealed at a electrophoregram in a form of two fractions with various mobility and intensity. The quantity of the found out phenotypes should be considered as a minimum one because it was possible to find out the infrequent forms only after realization of a very big number of research studies (for example, occurrence of some phenotypes can be 1:1000 and even lower). Perfection of electrophoresis techniques or application of other carriers (for example, polyacrylamide gel) can also increase a number of phenotypes owing to high resolving power and division of homogeneous transferrin fraction into several sub-factions. The type of transferrin actually did not render influence on the content of haemin proteins, while the indices of ferrum transport fund showed out such kind of dependence. Taking into account that total iron binding capacity (TIBC) was caused by transferrin presence in blood serum, the distinction in this indicator characterized both the transferrin content, and its transport possibilities in relation to iron. The highest content of total iron and TIBC was observed at a slow phenotype of CD tranferrin type (formed by fractions with the least mobility). Fast type of tranferrin АВ (formed by the most mobile fractions) had high enough content of the totaliron but possessed the least iron-binding ability that specifies to the worst performance capabilities of transportation of iron ions. Taking into consideration the transferrin value in formation of antibacterial immunity, it is possible to assume, that broilers with phenotype СD should be more resistant to infections.

In the conditions of the Republic of Belarus there was studied the antihelmintic characteristics of the preparative forms of marsh cinquefoil (Comarum palustre): herbal infusion, infusion, liquid, extract, pulvis. The research has shown that these preparative forms in the specified dozes had a rather high therapeutic efficiency against strongylatosis of gastro-intestinal tract of young ruminants. The highest therapeutic effect was rendered by a liquid extract of Comarum palustre after its administration to animals in a dose of 0,2 ml/kg twice with 24 hour interval. In this case during the strongylatoses of a gastroenteric tract the antiparasitic intensefficiency of sheep and cattle by the end of experience was 98,1% and 97,3% respectively, and antiparasitic extensefficiency was 90% for both kinds of animals. After herbal infusion application of Comarum palustre for animals (in a dose of 7 ml/kg of live weight before feeding once a day within 3 days continuously) by the end of the 14 day of the experiment made it possible to obtain intensefficiency of 70% for both animal species, and extensefficiency of 60% for sheep and 70% - at calves. Tincture application of marsh cinquefoil for animals in a dose of 1 ml/kg of live weight of twice with 24 hours interval, provided the intensefficiency of 85% for sheep and 84% - for cattle, and extensefficiency of 70% and 80%, respectively. In the conditions of application of a pulvis of marsh cinquefoil in a dose of 500 mg/kg of live weight twice with 24 hours interval, made it possible to obtain the 63,4% intensefficiency for sheep and 67,8% - for calves, and extensive efficiency - 50% and 40%, respectively.

In the conditions of the Republic of Belarus by an example model of a purulent wound at rats there was realized an experimental study of pharmacological activity of a medical remedy PhytoMP (containing active substances of Macleaya microcarpa (Maxim.) Fedde of Papaveraceae family; and Plantago major L. of Plantaginaceae family) in the form of powder. It was established, that the intensity wound-healthing effect depended on a ratio of the components plume poppy / greater plantain 1 + 1:1, 2:1, 1:2. Studying of the remedy safety showed that PhytoMP in the maximal dozes was not toxic for animals after a single unitary intragastric administration in dose of 50000 mg/kg to mice and in dose of 20833 mg/kg to rats. The mentioned above indexes surpassed the recommended for human dose after application tonsilles (1,428 mg/kg) in 35014 and 14589 times, and also the recommended for human doses for application at a wound with size of 2x2 square cm (11,424 mg/kg) - in 4377 and 1824 times, respectively.

In the conditions of the Republic of Belarus there were studied the biochemical changes in blood of cows with chronic dystrophic processes in liver by an example of fatty hepatodystrophy. There was given an estimation of these changes taking into account animal physiological state (pregnancy). The metabolic profile including the enzymatic block from aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, cholinesterase, serum albumin, total cholesterin, total bilirubin and thymol test can be used in clinical and biochemical diagnostics in case of hepatic steatosis. Its changes in case of hepatic steatosis were characteriszed by increase in activity of aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, decrease in activity of cholinesterase, decrease in blood serum of albumins concentration, increase in general cholesterol and high values of thymol tests. Determination of gamma-glutamyl transpeptidase influence and flocculation test on apo-beta-lipoproteins showed that they should not be included in this complex due to their small information content. In the process of estimation of changes of a metabolic profile of blood serum it wasnecessary to consider the physiological state of animals (pregnancy) because the activity of some enzymes and metabolite concentration at them could essentially differ. Taking into consideration the character of hepatic steatosis course, the studied metabolic profile can be recommended for hyposthenic current chronic activity with the considerable involvement degree of hepatocytes into the process.