Morbidity of the respiratory organs of healthy calves recovered after intranatal asphyxia

Abstract

The aim of the work is to carry out a comparative assessment of the morbidity of respiratory organs in healthy calves and those with intranatal asphyxia. The object of the study were newborn calves, which were divided into 4 groups: №1 (control, n = 30) – healthy calves, №2, №3 and №4 - animals born as a result of spontaneous, but obstructed labour, during which they suffered intranatal asphyxia of mild (n = 30), moderate (n = 28) and severe (n = 24) severity, respectively. All calves were under constant supervision from birth to 4 months of age. At the same time, attention was focused on the registration of primary cases of respiratory diseases, the severity of their course and outcome. In the course of the study, it was found that calves that suffered intranatal asphyxia for several months retain a high incidence of respiratory diseases. At the same time, the age and form of manifestation of respiratory diseases depend on the severity of the primary pathology. So, after mild asphyxia, bronchopneumonia is more often diagnosed. In comparison with it, bronchopneumonia and respiratory distress syndrome prevail for those, who have experienced moderate pathology, and after severe asphyxia - respiratory distress syndrome. In addition to changes in the morbidity structure, mortality increases by 26.0% and 2.9 times, respectively. The data, presented in the article, indicate the presence in calves, that suffered intranatal asphyxia, pathophysiological mechanisms that form the risk of respiratory diseases (r = 0.60; p ˂ 0.001).