Activity of indicators of the humoral immunity unit of calves for the action of pyridoxine hydrochloride

Abstract

The article presents the data of the effect of different doses of pyridoxine hydrochloride on the activity of humoral immunity in the blood serum of calves of the dairy growing period. The lowest activity of the indicators of humoral immunity was found in the serum of calves for the first day of life in all research groups. Exogenous administration of pyridoxine hydrochloride to colostrum and milk led to changes in the studied parameters. It was found that the bactericidal activity of serum increases on the 21st day of calf life and slightly decreases on the 90th day. The addition of pyridoxine hydrochloride at different doses to the milk leads to a probable increase in bactericidal activity of the serum only at doses of 4.0 mg/kg body weight at 60 and 90 days (P<0.05) and 5.0 mg/kg body weight from 21 90 days (P<0.05). Serum lysozyme activity increases during ontogeny and under the action of exogenous pyridoxine hydrochloride. A significant difference between the lysozyme activity indices of the control and experimental groups was established in calves of II, III, IV and V groups on the 60th and 90th day (P<0.05, P<0.01). Complementary activity of serum increases during ontogenesis, and additional introduction of pyridoxine hydrochloride has led to its decrease. A significant decrease in the complementary activity of serum was detected in calves at doses of 4 mg/kg body weight on the 90th day (P<0.05) and 5 mg/kg body weight from 21st to 90th day (P<0.05, P<0.01).