UDC 636.2.083.78: 577.1
DOI: 10.36871/vet.zoo.bio.202310011
Authors
Vasily P. Ivanyuk,
Sergey V. Laptev,
Oleg Yu. Meshcheryakov,
Moscow State Academy of Veterinary Medicine and Biotechnology – MVA by K. I. Skryabin”, Moscow, Russia
Abstract
The conducted studies have established that in the group of deep-calving cows with normal and
elevated biochemical parameters, an increase in the content of total protein, glucose, concentration
of inorganic calcium, an increase in the activity of ALT and alkaline phosphatase was observed.
From immunological indicators, the number of T- and B-cells increased. Here, factors that increase
the natural resistance of the body of cows, namely, the increase in bactericidal and lysozyme activity
of blood serum, are of great importance.
In the group of deep-calving cows, where immunobiochemical parameters in most cases were
lower than control analogues, the concentration of total protein, glucose, triglycerides, cholesterol,
carotene, AST and alkaline phosphatase activity decreased most intensively. Conducting immunological
monitoring, a decrease in the number of T- and B-immunocompetent cells was established,
bactericidal and lysozyme activity and an indicator of phagocytic activity fell. Draws attention to
the weakening of the cellular link of immunity, which indicates the depletion of T-lymphocytes and
the development of immunodeficiency states in females.
Calves obtained from cow mothers with low immunobiochemical parameters were much more
likely to become ill with rotavirus infection, and in half of the diseased calves (26.6 %) a severe form
was noted, and in 20 % of the diseased calves a moderate severity of the disease was diagnosed.
Keywords
cows, calves, blood biochemistry, immunology, rotavirus infection
