Utilisation of iodine from different sources by sows and their progeny

作者：Banoch Tomas; Fajt Zdenek; Kuta Jan; Kotrbacek Vaclav; Konecny Roman; Travnicek Jan; Svoboda Martin^*

来源：Neuroendocrinology Letters, 2011, 32(4): 510-517.

• potassium iodide
• iodine enriched alga
• iodized fatty acid esters
• T(3)
• T(4)
• serum
• colostrum
• milk
• piglet

OBJECTIVES: The aim of the study was to compare iodine utilization from different sources by sows and their progeny and the levels of T(3) and T(4) in their serum.
DESIGN: Pregnant Czech Large White x Landrace sows were fed with an experimental KPK diet (a diet for lactating sows) 14 days before parturition until weaning (at a piglet age of 28 days). In group A (n=50, 10 sows, 40 piglets) the feed was supplemented with KI (0.6 mg of iodine per kg of feed). Iodine enriched alga Chlorella spp. (0.6 mg of iodine per kg of feed) was used as a supplement in group B (n=50, 10 sows, 40 piglets). In group C (n=50, 10 sows, 40 piglets) the sows were injected i.m. with IFAE at a dose of 100 mg of iodine per sow. Iodine, T(3) and T(4) were measured in each group for comparison of iodine utilization.
RESULTS: The use of IFAE resulted in higher serum concentrations in sows compared to KI and alga. In contrast, iodine concentrations in milk and piglets were lower when IFAE were used. We found a wide variation in the concentrations of T3 and T4 in the serum of piglets in all groups.
CONCLUSION: Our results indicate a good utilization of iodized oil by sows. However, its transfer into milk is lower compared to the other iodine sources.