Iodine content in soils and the prevalence of endemic goiter

We compared the iodine content in soils and the incidence of endemic goiter in the population of the northwestern regions of the Tatar ASSR based on the materials of expeditionary surveys in 1963-1965, in which the authors took part. Some settlements (Zelenodolsk, Novaya Tura, Osinovo) were known as centers of severe goiter endemic as early as the 19th century. [4, 9, 11]. A serious examination of the state of the thyroid gland in children in the workers' settlements of Vasilyevo and Yudino was carried out by A.G. Suvorov (1936), and in the city of Zelenodolsk — by F. G. Tazetdinova (1964). We did not find data on the incidence of goiter in the northwestern regions of the Tatar Autonomous Soviet Socialist Republic, depending on the iodine content in the soil, in the literature.