The article deals with the prevention problem of digestive system diseases in pig-breeding and therapeutic measures perfecting for these diseases. In article are given new methods of prevention without using antibiotics

In the article showed results of the researches of the influence on productive longevity of cows of such factors, as a linear belonging, a genotype of the father, type of selection are stated. The lead researches have shown, that more longer duration of use characterized the animals belonging to line Siling Trajdzhun Rockit 252803 - 4,5 lactations. Among daughters of various bulls the greatest term of productive use daughters of the bulls the Silach 158 - 5,0 lactations differed. At the maximal deviation in efficiency of ancestors (6001-7000 kg of milk) longevity of their daughters was the greatest and has made 4,18 lactations. The greatest influence on duration of economic use of cows was rendered by specific features of bulls (32,2%) and a linear accessory -12,0%. While the selection variant practically does not influence longevity of animals - a share of influence of 3,7%

In the experiment with swine there was studied the influence of ultra-violet and various doses of narrow-band red radiation on efficiency and safety of animals. It has been established, that efficiency and safety of animal skilled groups in comparison with animals of control group has risen. Use of an ultra-violet and narrow-band red irradiation with frequency rate of inclusion of red light three times has a day allowed to raise average alive mass of young plants of pigs on 2,5 kg or on 9,1% (Р less than 0,01), a daily average gain - on 9,6%(Р less than 0,001) and safety of animals - on 10%

It is established, that application of laser radiation of low intensity of infra-red area of a spectrum together with a constant magnetic field (an exposition 180 seconds) promotes correction of immunity of an organism of newborn calves that leads to increase in intensity of growth, and decrease in disease of young growth

Usage of preservatives Kormoplus 1 and 2 lets us produce the silage of a highest quality and raise dry substance integrity at 8,7%, protein - at 12-9,4%. The researches determined that cereal silage, prepared with supplement Kormoplus 1 and 2, lets us raise digestibility of dry substance at 5,5% and 3,7%, organic substance - at t 5,5 and 4,0%, fiber- at 16,5 and 15,0% and raise nitrogen sediment at 17,4 and 20,8%. These forages didn't have any negative influence at health and biochemical performance of cow blood

Data on working out a quantitative polymerase chain reaction (PCR) for revealing of virus of infectious bovine rhinotracheitis realized in the conditions of the Republic of Belarus was presented. The development of the qualitative PCR was realized in the following stages: analysis of viral genome and selection of primers; synthesis of primers and control of their specificity; optimization of conditions for PCR; obtaining of positive control and determination of its concentration; obtaining and testing of probe and optimization of its concentration for PCR; testing of the developed method and determination of sensitivity. The obtained method made it possible to determine not only presence of infectious bovine rhinotracheitis, but also its initial amount in sample. Due to application of probe constructed in accordance with molecular beacon technology the presented method proved to be highly specific. That was connected with the fact that fluorescence was registered only when the probe connected to complementary part of DNA, in other case the result was negative. Research results showed that the sensitivity of the given procedure made it possible to define in a sample presence of a virus with concentration 2 lg that corresponded to 2 DNA copies

Analysis of manifestation of chlamydial infection of cattle in the conditions of forage affect with mycotoxins was realized in the conditions of the Republic of Belarus. Research results showed that chlamydial infection proceeded in association with aflatoxin, T-2 toxin, deoxynivalenol, zearalenone and ochratoxin. In course of the biochemical analysis there was noted the lowering of carotene on 23%, and vitamin A – in two times; also there was slight lowering of alkaline reserve. The obtained data proved the substantial changes in content of sub-populations of lymphocytes in cow blood in dry and postnatal period. During the immunological study of immunoglobulins in blood serum of cows sick with postpartum chlamydial endometritis it was revealed that titre of immunoglobulin A was on 31% higher. Level of immunoglobulins G and M differed slightl

Investigation of histomorphological characteristics, organoleptic and physicochemical parameters of sheep meat and slaughter products, their biological value and bacterial number was realized in the conditions of the Republic of Belarus. Research results established that administration of liquid extract of common St.-John's wort (Hypericum perforatum) made it possible to obtain the substantial degree of sheep carcass bleeding, as well as the formation of a drying crust on a carcass surface. At a cut there was revealed the firm texture meat of light red or red color. Cut surface was wet and had specific flavour for the observed type of meat. Fat was solid, white or with yellow colour tone; tendons were elastic and solid. Analysis of boiled meat of sheep which were administrated by amber liquid essence showed that the cooking water was clear, without foreign odor. Meat of sheep, which were administrated by 2,5 % albazen suspension and were killed at 2 and 7 investigation days, had light medical odor in cooking water. In control variants the organoleptic parameters of sheep carcasses corresponded to fresh meat parameters of healthy animals. Realized physical-chemical analysis established the positive qualitative reaction to activity of peroxydase ferment in all meat samples, as well as the negative reaction to determination of primary protein breakdown products. Organoleptic and physical-chemical parameters of sheep meat after administration of amber liquid essence did not have any differences from animal meat of the control group

Determination of degree and relations between derangements of metabolic processes in calves with respiratory syndrome in the milking period was realized in the conditions of the Republic of Belarus. Research results showed that the calves with the respiratory syndrome had expressed metabolic processes disturbances, which were marked in the analyzed biochemical blood indexes (total protein; albumins; urea; creatinine; glucose; cholesterin; triglycerids; bilirubin; ALP; AAT; SGPT; calcium; phosphorous; magnesium; iron; manganese; cobalt; cuprum; zinc). In calves with respiratory syndrome there was noted the increased content of crude protein in blood serum (71,42 +/- 2,57 g/l P less than 0,05), low urea level (3,08 +/- mmol/l). There was the increased level of creatine (574,11 +/- 65,26 mkmol/l; P less than 0,01) and bilirubin (8,11 +/- 1,15 mkmol/l; P less than 0,05). Glucose concentration in blood of diseased calves was at below standard level (3,49 +/- 0,69 mmol/l). Glucose indexes varied and were changing during a day; and depended on muscular activity, intervals between feeding and hormonal regulation. Diseased calves had high cholesterol level in blood serum (4,07 +/- 0,34 mmol/l; P less than 0,05), which was stated in case of liver disease and hypothyroidism. Phosphor level was higher than the standard indexes of healthy calves (2,85 +/- 0,03 and 2,05 +/- 0,05, respectively). Content of magnesium, cobalt and zinc in blood of the diseased calves was lower than in healthy ones. Calves with respiratory pathology had protein, fat, hydro-carbonic and mineral metabolic processes

In the conditions of the Republic of Belarus the seasonal derangements of metabolic processes at high-producing cows usually take place in the period from March till May. Analysis of efficiency of application of national preparation CMP (complex-mineral preparation -iron (15 mg/ml); iodine (6,8 mg/ml); magnesium (6,0 mg/ml); selenium (0,32 mg/ml) and vitamin preparation Trivitim (vitamin A – 30000 IU; , vitamin D – 40000 IU; vitamin E – 20 mg) for the preserving of high milking yielding capacity and prevention of metabolic processes disorders was realized. Four groups of high productive cows were formed. First group was entered 10 ml of CMP intramuscular; cows of the second group were entered 10 ml of Trivitim intramuscular; cows of the third group were entered CMP and Trivitim in the same doses; and the fourth group was a controlled one. On the 1-st, 7-th and 15-th days there was realized evaluation animal clinical state, hematologic and biochemical blood indexes (leukocytes; erythrocytes; hemoglobin; thrombocytes; ESR; total protein; albumins; urea; creatinine; glucose; calcium; phosphorous; magnesium; iron), and average daily milk yield. There was also analyzed the phagocytic activity of neutrophilic leukocytes. Research results showed that content of leukocytes and ESR in blood in all experimental groups was within the standard limits. In the first experimental group there was state the increasing of hemoglobin (from 91,4 +/- 4,38 up to 111,83 +/- 4,3 g/l (P less than0,05) ) and erythrocytes (from 4,48 +/- 0,21 up to 5,97 +/- 0,45 10E12/l) content. The same changes were stated in cows of the 2-d and 3-d experimental groups. Content of hemoglobin and erythrocyte in blood of cows which were administrated with CMP and Trivitim increased from 90,6 +/- 0,06 to 99,83 +/- 3,61 g/l and from 4,51 +/- 0,27 to 5,55 +/- 0,28 10E12/l, respectively. Analyze of biochemical indexes of cow blood showed that content of total protein, calcium, phosphorus, magnesium and iron increased. On the 15-th day there was stated the decrease of urea. Research results proved that the combined application of CMP and Trivitim was efficient and prevented subclinical disorders of metabolic processes