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.

In the conditions of the Republic of Belarus there were analyzed the peculiar features of morphology of bursa of Fabricius of turkeys broad-breasted white turkeys at the stage of postnatal ontogenesis. Research results showed that postnatal ontogenesis of bursa of Fabricius of turkeys developed irregularly with preservation of organ up to 220 days. At turkeys in 300-day old age the organ preserved only in 45% of bird units. Form, colour and consistency of bursa of Fabricius depended on bird age. The absolute weight of the organ increased up to 220 days. The relative weight was maximum at 20-day old age. The sexual peculiar features of the organ morphology were insignificant; they revealed after the beginning of sexual maturity and expressed by some difference in weight and linear dimensions.

Studies of morphological and morphometrical particularities of rennet of newborn calves with different degree of antenatal hypotrophy were realized in the conditions of the Republic of Belarus. Scientific-and-production researches were spent in 2007 - 2008 on the basis of agricultural production co-operative Dembrovo (Shchuchinskij district, Grodno area, Belarus), agricultural production co-operative Okhovo (Pinsk district, Brest region, Belarus) and research laboratory of Grodno State Agrarian University (Belarus). For an estimation of morphofunctional maturities there were used 165 1-day old calves. Research results showed that in the studied calves the basic indexes of glanderous apparatus of rennet proved the different degree of morphofunctional immaturity. In calves with hypertrophy in the first days after birth there stated an active morphogenesis of all cytological components of rennet

Investigation of histological structures of liver of fattening broiler chickens after application of concentrate of E and F vitamins produced on the basis of rapeseed oil was realized in the conditions of the Republic of Belarus in order to evaluate their efficiency for prophylaxis of massive hepatic necrosis. Research results showed that application of the vitamins on the basis of rapeseed oil promoted the support of structural properties of hepatic cells that proved their higher antioxidant efficiency in comparison with synthetic vitamin analogues

Analysis of national studies and literary sources on problems of haemophilus pleuropneumoniae of swine was realized in the conditions of the republic of Belarus. Research was realized in the conditions of Agricultural Production Co-operative Uritskoe (Gomel region, Belarus). It was established that medical actions gave positive result only at early stages of disease.

Development principal cause antenatal oligotrophy at young animals are infringements of feeding norms of pregnant animal, exchange processes and, as consequence occurs hypoxia and fetus toxicosis. Congenital oligotrophy at calves is accompanied hypoplasia of many vital bodies and systems, especially digestive and immune that is shown by secondary immune insufficiency which aggravates age immune deficiency. Decrease in immune reactance, in turn, oppresses erythropoiesis, arise gastroenteric pathology, and the current oligotrophy is aggravated. The work purpose is to study structurally functional features of spleen, lymph nodes, thymus and abomasum at newborn calves with signs of antenatal hypoplasia, arising at unsatisfactory feeding and the maintenance of pregnant dry cows. During research it is established, that structurally functional changes of bodies have been found out in the deadborn and fallen calves in the first 7 days with various degree of antenatal hypoplasia of immunogenesis which testify to morphological immaturity and changes typical for phases of accidental transformations. During the same period occurs active morphogenesis of abomasum tissular components at hypotrophic calves which has the features that it is necessary to consider at the organization of feeding and young animals cultivation. Growth and development degree of lymphoid structures and calve abomasum closely correlating with the morphofunctional status of their organism. | Основной причиной развития антенатальной гипотрофии у молодняка являются нарушения норм кормления беременных животных, обменных процессов и, как следствие, происходит гипоксия и токсикоз плода. Врожденная гипотрофия у телят сопровождается недоразвитием многих жизненно важных органов и систем, особенно пищеварительной и иммунной, что проявляется вторичной иммунной недостаточностью, которая усугубляет возрастной иммунный дефицит. Снижение иммунной реактивности, в свою очередь, угнетает эритропоэз, возникают желудочно-кишечная патология, и усугубляется течение гипотрофии. Цель работы - изучить структурно-функциональные особенности селезенки, лимфатических узлов, тимуса и сычуга у новорожденных телят с признаками антенатального недоразвития, возникающие при неудовлетворительном кормлении и содержании стельных сухостойных коров. В ходе исследований установлено, что у мертворожденных и павших в первые 7 суток телят с различной степенью антенатального недоразвития были обнаружены структурно-функциональные изменения органов иммуногенеза, которые свидетельствуют о морфологической незрелости и изменениях, типичных для фаз акцидентальной трансформации. В этот же период происходит активный морфогенез тканевых компонентов сычуга телят-гипотрофиков, который имеет свои особенности, что необходимо учитывать при организации кормления и выращивания молодняка. Степень роста и развития лимфоидных структур и сычуга телят тесно кореллирует с морфофункциональным статусом их организма.

As a result of realized in the conditions of the Republic of Belarus research it was revealed that application of immunostimulative drugs of sodium thyosulphate and vitamin С (ascorbic acid) in combination with a vaccine against salmonellosis, pasteurellosis and streptococcosis of pigs promoted the statistically authentic increasing of leukocytes, absolute quantity of T- and B-lymphocytes content in peripheral blood. Also, it promoted the activation of phagocytic activity and digested ability of neutrophils; activization of mieloblastic hemopoiesis and decreasing of erythrocytopoiesis; activization of morphological reactions in a tissue at a place of administration of the vaccine, lymphatic nodules and spleen. | Проведенные исследования показали, что применение иммуностимуляторов натрия тиосульфата и витамина С с вакциной против сальмонеллеза, пастереллеза и стрептококкоза свиней способствует статистически достоверному повышению в периферической крови содержания лейкоцитов, абсолютного количества Т- и В-лимфоцитов, активизации фагоцитарной активности и перевариваемой способности нейтрофилов; активизации миелобластического кроветворения и снижению эритропоэза; активизации морфологических реакций в ткани на месте введения вакцины, лимфоузлах и селезенке.

In the conditions of the Republic of Belarus by means of application of a scanning electron microscopy there was realized a morphological assessment of the efficiency of mono- and associated antiviral vaccines. It is shown, that analyzed biological preparations invoke in poultry a number of structural disorders among which it is possible to mention both immunomorphological changes, and pathomorphological processes. The highest reactogenicity was showed by of monovaccines against infectious bronchitis (produced by Research Institute of Animal Protection, Russia); infectious laryngotracheitis (Institute of Experimental Veterinary of S.N.Vyshelesskij, Belarus); and also an associated vaccine against infectious bronchitis, infectious bursal disease and Newcastle disease (Research Institute of Animal Protection, Russia). These vaccines caused essential structural disorders in tissues at a place of administration, liver and kidneys. Administration of the vaccine against infectious bursal disease and associated vaccines against infectious bronchitis, infectious bursal disease, infectious laryngotracheitis and Newcastle disease (Institute of Experimental Veterinary of S.N.Vyshelesskij) strengthened the processes of lymphatization in fabricic bursa. All studied biological products caused activization of morphological reorganization of immune apparatus of a spleen and did not render essential influence on thymus structure. | С использованием сканирующей электронной микроскопии проведена морфологическая оценка эффективности моно- и ассоциированных противовирусных вакцин. Показано, что указанные биопрепараты вызывают в организме птиц ряд структурных нарушений, среди которых можно выделить как иммуноморфологические изменения, так и патоморфологические процессы. Наибольшую реактогенность проявляли моновакцины против инфекционного бронхита кур (ФГУ ВНИИЗЖ, Россия), инфекционного ларинготрахеита (ИЭВ им. С.Н. Вышелесского), а также ассоциированная вакцина против ИБК, инфекционной бурсальной болезни и болезни Ньюкасла (ФГУ ВНИИЗЖ, Россия), которые вызывали существенные структурные нарушения в ткани на месте введения, печени и почках. Использование вакцины против ИББ и ассоциированной вакцины против ИБК, ИББ, ИЛТ и БН (ИЭВ им. С.Н. Вышелесского) усиливало процессы лимфатизации в фабрициевой бурсе. Все изучаемые биопрепараты вызывали активизацию морфологической перестройки иммунного аппарата селезенки и не оказывали существенного влияния на структуру тимуса.

In the conditions of the Republic of Belarus there was presented a characteristic of breeding stock of mares of Trakensky breed in accordance with body conformation and exterior. In course of the study there were taken measurements of height at the shoulder, heart-girth, metacarpus circumference at 1 year old and two year old age stages. There was calculated an index of massiveness which characterize the development of chest, index of bone which provided insight into skeleton development. Research results showed that in accordance with an exterior the breeding stock mares had a deep and massive barrel, good skeleton and developed muscle. The index of massivness was 118,4-120,5, bone index – 20,8-21,6, that corresponded to a type of riding horses. In accordance with the exterior, measurements and quality of posterity the mares of the bred lines obtained high grades and 93,5% were graded as elite class.

Determination of regular variations of macromorphological and topographical characteristics of thymus gland, spleen, thyroid gland, and atrabiliary capsules of swamp beavers (Myocastor coypus) at the postnatal ontogenesis was realized in the conditions of the Republic of Belarus. Taking into consideration active participation of immune and endocrine system organs in metabolic processes and vicarious and adaptive reactions there were revealed species and age-specific anatomical peculiar features of thymus gland, spleen, thyroid gland, and atrabiliary capsules of swamp beavers that made it possible to broader knowledge in the sphere of species, age-specific, breed and topographic anatomy