Farm animals, iodine studies

The recommended dietary iodine intakes represent amounts of iodine sufficient to prevent symptoms of deficiency and impairment of health or performance while maintaining the body s store of iodine (see sections Requirements/ Recommendations for Iodine Supplementation and Response Criteria and Dose—Response Studies of Iodine Requirement in Farm Animals ). Recommended daily... 

Iodine feed supplements must be stable to meet the needs of several groups of farm animals. lodates [Ca(I03)2 X 6H2O Ca(I03)2] and iodides [Nal KI] are both approved feed supplements in the EU (2003, 2005). lodates are more stable than iodides as feed additives and so are used preferentially. Cheeke (1991) suggests that eth-ylenediamine dihydroiodide (EDDI) and pentacalcium orthoperiodate may be suitable feed iodine additives, but does not include information on their stability. In our studies we found that a casein-bound iodine supplement produced by milling casein with KI was highly stable Schone et al., 1997c). 

Response criteria and dose-response studies of iodine requirement in farm animals... 

This chapter describes some dose-response studies of the iodine requirement of farm animals fed typical grain diets without or with glucosinolates as iodine antagonists. 

In 1907, Marine, an American medical scientist, studied thyroid disease and iodine deficiency in farm animals and fish. Then, in 1916, he began to apply his findings to the prevention of goiter in humans. His administration of sodium iodide to school girls in the fifth to twelfth grades in Ohio demonstrated that such treatment effectively prevented goiter. 

We report here a certain number of studies performed in laboratory or farm animals to evaluate the bioavailability and thyroid uptake of iodine after the administration of these compounds. 

Farm animal studies demonstrate that in normal large animals, the oral absorption of lipiodol causes a progressive increase in blood iodine levels. In iodine deficient pigs, a very rapid increase in blood iodine levels, which lasted 2,5 months, was observed. The clinical efficiency of the iodized oils therapy was strongly suggested by various authors who evidenced lamb goiter in Australia and New Zealand and successfully treated it by iodized oils . 

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