Імунний статус телят, хворих на гастроентерит

Abstract

It has been established that there is a violation of the immunocompetence of the macroorganism at diseases of the gastrointestinal tract which are accompanied by diarrhea. Since the immune system is one of the most important homeostatic systems in the body, these disorders play an important role in the pathogenesis of the disease. Thus, the purpose of the work was to study the indicators of natural resistance and immunological reactivity in calves with gastroenteritis. The research was carried out at the state enterprise «Milk Rinks»Pravda LTD in Brody district of Lviv region on 1.5–2-month-old-calves. 15 calves were selected for the study: 5 healthy ones and 10 patients with gastroenteritis. Blood for research was taken from the jugular vein before the early feeding.In the study of indicators of natural resistance, it was found that in calves with gastroenteritis, the content of circulating immune complexes in serum is authentically (P < 0.001) greater than 45.1%, bactericidal and lysozyme activity of serum is authentically (P < 0.01 ) lower at 15.1 and 26.3% and phagocytic activity of neutrophils – by 8.6% compared with healthy animals. In the study of lymphocytes and their subpopulations, it was found that the relative amount of T-total and T-active lymphocytes is authentically (P < 0.01) less by 8.6 and 11.7%, respectively, compared with healthy animals, the relative number of T-helper cells – less than 16.4% (P < 0.01). There is no probable difference in the relative number of T-suppressors between patients and healthy animals, but the immunoregulatory index in calves, patients with gastroenteritis, is 19.4% smaller, compared with healthy ones. The relative number of B-lymphocytes was authentically (P < 0.01) less in sick animals by 14.5% compared with clinically healthy ones, and the content of immunoglobulins in serum was lower by 16.3% (P < 0.01). Conclusion: in calves, patients with gastroenteritis, there are a number of violations of the immune system, characterized by a decrease in the parameters of cellular and humoral immunity, which require correction in the process of treatment.