Dynamics of hematological and oxidative parameters characterizing the nonspecific resistance of cows under technological stress

Abstract

The aim of the work was to study the dynamics of biochemical, hormonal and oxidative parameters in the blood of cattle from the point of view of nonspecific resistance of animals under the action of technological stress. Technological stress was accompanied by the entry of cortisol into the blood, a significant intensification of lipid peroxidation processes, a decrease in the activity of the antioxidant system of the blood, and a change in the nonspecific resistance of the animal organism. On day 1 after technological stress, the content of cortisol and the level of DC in the blood increased by 2 times, an increase in MDA and OR, a decrease in catalase and reduced glutathione were observed. The most pronounced changes were recorded on days 3-14 after technological stress. The animals showed neutrophilia, monocytosis, lymphopenia and appearance of NEToses on days 3 and 14 after technological stress. On the 3rd day after technological stress, an increase in lysozyme activity of blood serum and a decrease in bactericidal activity were shown. Preservation of reduced indicators of reduced glutathione and lysozyme activity while maintaining cortisol at the upper limit of indicators relative to the initial values was recorded by 30 days in cows after technological stress. The data obtained indicate that the body’s defenses are a dynamic physiological indicator, which must be taken into account as a general resistance of the cattle body to stressors in order to prevent the disruption of the body’s adaptive capabilities.