IMMUNOBIOLOGICAL REACTIVITY OF THE ORGANISM OF CALVES IN THE AGE ASPECT
The character of changes in the cellular composition of the blood of newborn calves depending on the post-embryonic period is established. The proliferation of immunocompetent cells (T- and B-lymphocytes) in the early postnatal period was minimal, while the number of NK-lymphocytes was high. By the month age the T - and B-lymphocytes gradually increased, while the number of NK-lymphocytes decreased to a minimum within the physiological norm.