Calves’ blood biochemical status in the norm and in the digestive organs pathology

The purpose of the study is to give a comparative analysis of the biochemical parameters of the blood serum of calves in the norm and in acute disorders of the gastrointestinal tract. During the period 2019-2020 in the educational and experimental farm of the Transbaikal Agrarian Institute, blood serum biochemical studies were carried out in Hereford breed calves from birth to 1.5 months of age in clinically healthy calves and in calves with signs of digestive disorders using Stat Fax 1904+, URIT 800 Vet biochemical analyzers. Analysis of the obtained biochemical parameters involved in water-salt (K, Na, Ca, P, Fe), nitrogen (total protein, urea) metabolism and glucose levels in blood serum showed: a significant (P ≤ 0.01) decrease in the blood of calves phosphorus content by 23.5 %; calcium - by 54.8; iron - by 56 % compared with blood serum from clinically healthy calves. These changes can be explained by the fact that the territory of the Trans-Baikal Region belongs to the biogeochemical regions in terms of a number of macro- and microelements with the manifestation of endemic diseases. The average index of potassium was just below the physiological norm (2.9 ± 0.32 mmol/l), the Na level was 1.8 times lower than in clinically healthy animals (P ≤ 0.01). Biochemical analysis of blood serum gives the possibility to evaluate both the general state of the organism and the functioning of separate organs and systems at the early stage of the disease in young animals.