UDC 636.087.7
DOI: 10.36871/vet.zoo.bio.202111009
Authors
Regina F. Ivannikova,
Nikolay V. Pimenov,
Gulnora Sh. Navruzshoeva,
Moscow State Academy of Veterinary Medicine and Biotechnology – MVA by K. I. Skryabin”, Moscow, Russia
Abstract
The article presents the results of studies on the use of a feed additive containing live sporeforming bacteria Bacillus subtilis and live yeast Saccharomyces cerevisiae, sorbed on activated carbon particles, to pregnant cows for the formation of immunoglobulins in the body and their isolation in colostrum, as well as for the nonspecific resistance of the resulting calves. The experiments were conducted in the winter-spring period, when the body of cows and calves contains a reduced level of nutrients, immunoglobulins and other biologically active substances, which leads to inhibition of the function of both nonspecific resistance factors and specific immunity. It was found that the feed additive had a positive effect on the physiological and biochemical parameters of calves. In the colostrum of cows of the experimental groups, relative to the animals of the control group, the content of immunoglobulins was 36,4% higher. Calves whose mothers received a feed additive for 30 days at a dose of 20 g per head before calving had higher indicators of total protein, albumins, globulins and factors of nonspecific resistance, such as bactericidal and lysozyme activity of blood serum, phagocytic activity of neutrophils.
Keywords
feed additive, probiotics, calves, hematological parameters, indicators of nonspecific resistance.
