Effects of Feed Phytobiotics on a Tendency to Vaccine Stress Syndrome in Calves.

The surveys were carried out in order to study the vaccine stress syndrome effects on the morphological and biochemical blood parameters of calves with the reference dietary phytoadditive of adaptogenic properties. The additive contains components of plant origin (chamomile inflorescences, blue alfalfa, and spruce resin), fructose, ascorbic acid, a dried Bacillus subtilus culture product, and organic selenium. Three-day-old calves reared under the purebred cattle production system in Tambov oblast were allocated into two groups (control and experimental) according to the analog method requirements. The animals of the experimental group were fed the additive added to the milk at a rate of 10 g per head per day for 1 month. Two days after vaccination, the blood immunoglobulin level in calves of the control group was 1.3 g/L higher. The glucose level remained within the physiological norm, while it was higher by 29 mg/dL in the animals of the control group. The amount of conditionally pathogenic bacteria Klebsiella pneumonia in intestinal microbiota of animals fed the additive reduced and became ten times lower compared to that in the fecal samples of calves of the control group. A feed phytobiotics product had a positive effect on the adaptation of calves in the milk-feeding period of rearing to stressful conditions following vaccination. The blood neutrophils number and alanine and aspartate transaminase (ALT and AST) activities, which increased by 64.3, 26.4, and 18.1%, respectively, along with the lactate dehydrogenase (LDH) level elevated by 11.3%, can indicate the increased body resistance of calves. [ABSTRACT FROM AUTHOR]