HEMATOLOGICAL STATUS OF THE IMPORTED ANIMALS DURING THE ADAPTATION

Hematological profiles of imported Holstein bulls were studied twice after quarantine in order to control the process of adaptation of animals to new environmental conditions. It is shown that after quarantine in animals there was an increased content of leukocytes and hemoglobin in the blood relative to the physiological norm, which reflects the change in the functional state of the organism of bulls in connection with the change of the environment. The leukocyte content of 1/4 of imported bulls remained almost unchanged during the study period, and in more than 66 % of cases its subsequent decrease to the upper limit of the norm was observed. At the same time, it was noted that in some animals the decrease in the level of leukocytes occurred smoothly, while in others there were sharp falls. There were cases of a sharp increase in the number of lymphocytes (up to 93 %) a month after the quarantine of animals on the background of a decrease in neutrophils. The average content of erythrocytes in the blood was included within the boundaries of the reference values. Variation of this indicator was not high, in 83.3 % of animals it remained almost at the same level. The ratio of the volume of shaped elements and blood plasma in the studied bulls did not go beyond the physiological norm. The number of platelets in the blood of all bulls was within the reference limits. The imported bulls in the initial period of adaptation observed changes in the hematological profile, and subsequently formed a tendency to normalize the level of hematological parameters, which in the future will allow the animals to realize the genetic potential.