In the conditions of the Republic of Belarus there was studied the influence of various doses of kizelgur on metabolic processes and natural resistance of poultry by an example of lying hens. Use of the mineral additive rendered the positive influence on protein, carbohydrate, lipidic and mineral metabolism in hens. It was marked that in blood the content there was an increasing of crude protein on 11,5-11,7% (Р less than 0,05), crude lipids - on 1,9-5,3%, glucose - on 25,1-54,6% (Р less than 0,01), calcium - on 0,8-12,4%, phosphorus - on 8,9-15,9%, iron - on 9,2-24,6% (Р less than 0,01) and magnesium - on 9,3-21,6%. The laying hens which were fed with the mineral kizelgur additive were characterized by better resistance reactions. Bactericidal activity of blood serum of the experimental hens was higher on 2,7-15,3% (Р less than 0,01), lysozymic activity - on 1,3 22,5% (Р less than 0,05).

In the conditions of the Republic of Belarus there was studied the veterinary and sanitary quality and safety of poultry slaughter products after application of a natural biological corrector VitoLAD produced in Belarus on the basis of cultivation of nonpathogenic strain of fungi Fusarium sambuninum MKF-2001-3 used for restoration of dysfunction disorders. As a result of the realized bacteriological research there were marked no pathogenic and opportunistic organisms in all experimental samples of meat and internal organs. Indices of biological value of meat of three experimental and control group had no authentic differences. Displays of toxicity for infusorians were not marked. Poultry meat of investigated samples in control, and all three experimental groups (doses of 0,25 ml/head - the second experimental group, a dose of 0,5 ml/head - the third experimental group and a dose of 1 ml/head - the fourth experimental group) in diets of which there was added the natural biological corrector VitoLAD, proved to be good-quality and harmless. In accordance with organoleptic, physical and chemical, bacteriological indexes, as well as biological value and harmlessness did not concede to meat of the control group. The complex veterinary and sanitary estimation of bird carcasses of three experimental and control groups did not show any deviations from existing standards that made it possible to organize production realization without restriction.

In the conditions of the Republic of Belarus there was determined the productivity and foraging advantages of fodder galega (Galega officinalis) in comparison with the traditional perennial leguminous grasses (alfalfa (Medicago sativa); alsike clover (Trifolium hybridum); cookshead (Onobrychis viceaefolia)) and influence of the analyzed crop of state and internal microbiota of agricultural animals. There was studied the qualitative structure of galega in accordance with the phases of crop development and its influence on physiological functions of animals. It is established, that in the conditions of northern region of Belarus the fodder galega provided the yielding capacity of dry matter of 11,3 t/ha that exceeded the indices of alfalfa on 13,9%, alsike clover - in 2,7 times and cookshead - in 2,1 times. By the third decade of May it formed 18-20 tons green mass that made it possible to feed animals on 10-15 days earlier, than with other leguminous grasses. High degree of leafage (65,7%) preconditioned its high nutritional value. Fodder galega has high level of calcium, potassium, phosphorus and some microelements: copper, zinc, manganese, cobalt. Studying of vitamin value of fodder galega showed that its green mass was vitamin-rich, had enough of irreplaceable amino acids. It was established, that hay of fodder galega had high level of the non-decomposed protein (68,6-71%) that was very important for feeding of highly productive cows. It increased the level of crude protein in experimental animals on 8%.

In the conditions of the Republic of Belarus there was developed and a simple and applicable for industrial production method of immunoglobulin production against animal salmonellosis. The following initial raw materials were used for production of the specific immunoglobulin: blood serum of bulls which were hyperimmunized with formolated antigen on the basis of four serovars: S. typimurium; S. abortusovis; S. dublin; S. choleraesuis. In course of the study there were analyzed chemical and biological indexes of immunoglobulin of experimemtal series; determination of the preparation doses for white mice and pigeons. The experimental work on production of immunoglobulin against salmonellosis made it possible to develop a technological scheme of the analyzed preparation production. In course of the experiment there were found optimal conditions for serum fractionation; there were developed methods of its conservation, sterilization and quality control of the specific immunoglobulin.

In the conditions of the Republic of Belarus there was studied the application of sodium chloride obtained by electrolysis method on Akvamed installation in a complex of activities for the preventive measures of animal helminthoses. Electrochemical activation of aqueous solution of sodium chloride proved to be a progressive and rational technology which made it possible to substantially reduce the material costs and power consumption for the development of highly efficient and ecologically safe disinvasion solution. Application of sodium chloride solution with the minimal content of available chlorine of 3,0 g/l provided the death of 94-95% of Taeniidae eggs in course of 30 minutes after applicated of the preparation on the treated surface. The proposed method can be recommended as the most efficient and economically effective for the disinvasion of external environment.

In the conditions of the Republic of Belarus there was analyzed fauna of parasites of gastro-intestinal tract and natural resistance of horses in the conditions of Polesye State Radiation Ecological Reserve. There were worked the most efficient antihelminthic compounds. Analysis of helminthological state showed that extensiveness helminthic and gastrophilosis invasion of horses was at a high level. In this regard the nematodosis and gastrophilosis (Gastrophilus intestinalis) invasions prevailed. In mature and growing horses there was marked the dominance of nematode worms of Strongylidae / Trichonematidae families (78,9-83,8%) and Gasterophilidae (95,8%). Next, at growing horses there were stated nematodes Strongyloides westeri and cestoid worms of Anoplocephalidae family, at mature horses – of Gasterophilidae, Parascaris equorum and Oxyuris equi families. The following antihelminthic compounds ans preparations showed the best efficiency: Univerm; Avermektin paste 1%; Fenbendazoli, Rivertin 1%.

Development of scientifically based activities for rehabilitation of waterfowl (ducks) against helminthoses on the territory of the Republic of Belarus was realized. In course of the study there were analyzed fauna of helminthes and revelation of the main ways of their circulation in environment conditions; expansion and species composition of mollusks of Belarusian Poozerye; determination of species composition of metacercaria revealed in mollusks. In course of determination of intermediate and additional hosts of helminth infestation of ducks it was noted that the main carriers of larval stages of helminthes in ducks were the following species of frash-water mollusks: Vivaparus contectus; Vivaparus vivaparus; Galba palustris; Radix ovata; Radix auricularia; Sphaerium subsolidum; Bithynia tentaculata; Planorbis carinatus; Planorbis planorbis; Coretus corneus. In the studied samples there were revealed metacercaria of Echinostoma revolutum; Hypoderaeum conoideum; Cataropis verrucosa; Echinostoma dietsi. Assumption that some representatives of molluscum (Viviparus contectus; Viviparus viviparus; Planorbis planorbis) were the transport hosts for echinostomiasis was not proved.

In the conditions of the Republic of Belarus there was studied the influence of methods and means of spot heating and localization of warmth on growth, viability and physiological status of piglets. In course of realization of the experiment there was issued a task of scientific substantiation of application of brooders of different construction and proposition of the most optimal method of microclimate formation in resting area of piglets for the increasing of their growth and viability, and improvement of physiological state. Research results showed that the highest indexes of growth and viability, and intensity of metabolic processes in piglets were obtained after the combined application in course of the first three weeks of suckling period of filament lamps and heated floors and brooders in the form of tops with shields, and at a later stage – only brooders of this construction in comparison with animals which were in course of a suckling period under the infrared radiation lamps or at the space-heating floor.

In the conditions of the Republic of Belarus there was studied the clinical and biochemical status of pregnant cows, as well as the determination of the main reasons of disease incidence of new-born calves with dyspepsia (dyspeptic disorder). Realized clinical and biochemical studies showed that the inappropriate feeding of pregnant cows in animal breeding farms in housing season of husbandry caused the disorders of metabolic processes in the experimental animals. In blood there was noted the lowering of indexes of alkalinity reserve, glucose, phosphorous, carotine, disturbance of calcareous and phosphorous ratio. In other words, in pregnant cows there were stated the latent forms of osteodystrophia, hypovitaminosis A, hypoglycemia, and acidosis. All these factors caused the irritation and damage of liver and other organs. Mammary gland of diseased animals released colostrum milk of low quality and according to the content of nutritious and protective elements quantity it was of low quantity. Besides, derangements in calf feeding of pregnant nonmilking cows led to birth of calves with low resistance indexes to the influence of external environment factors.

In the conditions of the Republic of Belarus there was studied the morphology and growth dynamics of vomeronasal cartilage of swine at postnatal period. The vomeronasal cartilage covers the vomeronasal body outside. Lateral and medial bases of vomeronasal cartilage formed an antrum in which there was an organon vomeronasal. The most intensive growth of a cartilage of pigs occurred in the first two months of animal life. Arrangement of cartilage was dissymmetric - at the right it was sited more caudad than at the left; this fact caused the differences in its dimensions at the transverse sections.