ФУНКЦІОНАЛЬНИЙ СТАН ОРГАНІВ ІМУНОГЕНЕЗУ КАЧЕНЯТ У КРИТИЧНІ ПЕРІОДИ ПОСТНАТАЛЬНОГО ОНТОГЕНЕЗУ

The study of the functional state of immunogenesis young ducks during critical periods of growth and development is important for breeding and keeping birds of this species in view of improving the system of evaluation of the immune status of the organism. Such approaches make it possible to warn the development of immunodeficiencies body ducks develop improved feeding schemes to improve capacity performance. In the article are given results of the study of the functional state of the clinically healthy young duck's thymus, bursa Fabricius, spleen in critical periods of postnatal ontogenesis, whose were grown in conditions of Myklashiv farms of Pustomyty district, Lviv region. It is established the increasing of duck's absolute mass of immunogenesis organs on a background of reducing the relative weight and index. However, the functioning of immunogenesis ducklings in critical periods of growth and development of the actual numerical values indicating the relative weight and index. Pronounced changes in the index of immunogenesis observed on the border between 14 and 21 ducklings era of life that can be isolated as one of the critical periods of postnatal ontogenesis immunological this type of bird. The result is the index of thymus, bursa Fabricius, spleen ducklings who are within the physiological norm, show active progress imunomorfolohichnyh specific immune responses in these organs. At sufficiently high index seminary and reduced spleen index can prevent the development of adaptive-compensatory reactions B immunity and lack of imunodefitstnoho state body ducklings 45-day age.