Application of a composition of extractive substances of fir wood greenery to correct the immune status of calves

The data on the effect of the fir wood greenery extractive substances composition on the immunological status of neonatal calves are presented in the article. The effect of the composition on the main hematological and immunological blood parameters of individuals in the control and experimental groups was assessed. The blood parameters of animals remained within the normal values during the experimental period. It was recorded that the content of erythrocytes, hemoglobin, hematocrit, leukocytes, lymphocytes and platelets had insignificant variability over the entire study period. Leukocytes in calves of the experimental group by the end of the study were at the level of 9.20±0.64 109 /l, which is 1.2 times higher than in the control, where this indicator tended to slightly decrease during the experiment. The relative and absolute number of lymphocytes had a more pronounced increase in animals of the experimental group. The content of T-lymphocytes in the blood of experimental calves was at a stable level, whereas in the control group the dynamics of changes in this indicator in different periods of the study was more pronounced. The absolute value of B-lymphocytes during the study period increased in the experiment from 0.82±0.22 109 /l to 2.05±0.30 109 /l (2.5 times). In animals of the experimental group, by the end of the experiment, an increase in the absorption capacity of phagocytes by 1.2 times was observed in the phagocytosis system compared to the first day of life, in contrast to the control group, where such a pattern was not revealed.