Use of Radioisotopes in the Investigation of the Iodine Status and Thyroid Function in Farm Animals in the Sudan. Part of a Coordinated Programme on the Use of Isotopes to Diagnose Moderate Mineral Imbalances in Farm Animals. Fina

摘要

The thyroid weight of 2000 grazing animals (sheep, goats, cattle and camels), together with an estimate of thyroid activity and the iodine content of milk, using exp 131 I, suggest that iodine deficiency prevails in extensive areas of the Sudan. Iodine supplementation for humans and animals in the Sudan appears justified. Results are based on radioassays carried out to determine the blood serum levels of thyroxine and triiodothyronine, and the thyroid uptake of exp 131 I under conditions of adequate I-uptake. The I-content of milk (and blood serum, pasture, water and soil, where possible) was determined, in order to correlate the levels of the thyroid hormones and of exp 131 I-uptake with I-supply. Experiments were also carried out on the effects of administering balanced and unbalanced mineral rations on I-metabolism and thyroid hormone production. (Atomindex citation 12:575428)