Morphological changes in thymus of the chickens and laying hens receiving Vilomiks and Suvar feed additives

Scientific research on the effect of feed on the immune status of the organism of birds and farm animals is one of the most urgent tasks today. The study of the effect on the immunocompetent organs and, in general, on the organism of feeds, as well as the premixes added to them, makes it possible to identify the most beneficial for the farm. They contribute to improving digestibility, increasing the productivity of birds and farm animals. Histological studies of thymus mollusc and hens of egg laying haysex white, haysex brown at the age of 30, 60, 90, 120, 150 and 180 days showed changes, in the control group in the thymus the medulla consisted mainly of reticuloepithelial cells, macrophages, follicles and pseudo-eosinophilic granulocytes. And also in the cortex of thymus lobes, namely in lymphoid tissue, the process of accidental involution is actively occurring. The histological pattern of microscopic preparations of experimental groups is positive, the slowing down of the processes of accidental involution in the thymus is established, in comparison with the control.