EN
Clinical, radiological, hematological, gross pathological and histopathological examinations were carried out on pigs at the age of 6-7 months with the symptoms of movement difficulties, loss of appetite and cachexy. The animals were bred on a farm where weak attrited piglets of a poor survival rate were born. Epiphysiolysis and disturbances in morphology of long bones, insignificant enlargement and structural changes of the thyroid gland, lowered content of Ca, P, Na T3 and T4 and increased activity of GPT and FA in blood sera have been found. The iodine deficiency by impairment of vit. D3 metabolism may lead to epiphysiolysis and other disorders in ossification.