Morphology of the chicken sleep and its changes during vaccination
Abstract
A significant number of scientific work has been dedicated to the study of immunogenesis processes in birds vaccinated to infectious diseases. In most contingency, research is aimed at assessing postvaccination immunity, as well as establishing structural changes in the immune system. But, exactly morphological studies that can provide an objective account of the immune effectiveness of the vaccine and assess the state of the body's immune system. However, today, morphological control of the immune status of chickens in the post-vaccination period has not been multitudinous used in practical poultry farming. Creating new vaccine prevention schemes, experts do not take into account the changes that manifested during this period. The purpose of the article – Is to systematize and describe the main results of research on the morphology of the spleen of chickens during vaccination. It should be noted that infectious diseases of birds, occupied a special place are: infectious bursal disease, infectious bronchitis, Newcastle disease, infectious laryngotracheitis, etc. Now, these diseases are registered in almost all countries of the world and bring significant economic losses to poultry farms. The main morphological changes in the spleen of chickens during vaccination include hyperplastic processes (lymphocyte proliferation and enlargement of macrophages), the appearance of blast cells, the development of plasma cell reactions. Morphofunctional changes in the spleen of chickens during vaccination are reflected in a significant amount of literature, but changes in the body that occur with multiplex vaccinations during complex vaccination schemes are not enough covered. This review article put a short description of the effect of vaccination used worldwide on the morphology of the spleen of chickens. The received data of a complex assessment of the morphofunctional state of the bird's spleen at different ages should be taken into account when compare complex scheme of vaccination.
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