BIOCHEMICAL AND IMMUNOLOGICAL BLOOD PARAMETERS OF KAZAKH WHITE-HEAD STEERS OF DIFFERENT GENOTYPES
The article deals with the study on physiological state of calves belonging to different lines by their biochemical and morphological blood composition, among them are the following: Smychok 5545, Prizer 5001, Marzipan 2033 and Demon 7607. Considerable variability of hematological parameters depending on the origin of the animals has been observed. The advantages of steers of the Marzipan line (139.0 g/l) by the content of hemoglobin have been revealed. Their superiority over the animals of the same age, belonging to other genotypes, was 7.7-13 g/l (5.86 - 10.32 %). The total protein content turned to be the highest in steers belonging to the Smychok line (86.46 g/l), the lowest - in the representatives of Marzipan line (79.73 g/l). The maximum amount of albumin fraction was also observed in blood serum of steers belonging to the Smychok line. It is proved that the quantitative indices of the globulin fraction of protein in blood serum of the animals have been conditioned by their genotype. Its maximum concentration was observed in steers of the Smychok line - 45.92 g/l. The analysis of indices of natural resistance to the activity of non-specific immunity in young cattle shows that steers of the above line possessed the maximum bactericidal activity. The minimum level of bactericidal activity in blood serum was established in steers of the related Demon 7607 group. The maximum content of lysozyme in blood serum was noted in steers belonging to the Smychok line - 5545 - 3.10 micrograms /ml, which is more than in animals of other groups at 0.10-0.28 micrograms/ml (3.33 - 9.93 %). In general, the dynamics of blood indices under study does not go beyond the physiological norms.