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The Effect of Iodophor Post-Milking Teat Disinfection on Iodine Content in Goat Milk
Ovadia Y.S., Sabastian C., Dahl L...
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Iodine intake is important for thyroid function and human health. Goat milk can be an important source of iodine for human nutrition. However, data regarding the effect of iodophor post-milking teat disinfection on iodine content in goat milk is lacking. Our aim was to assess the iodine concentrations in raw milk of dairy goats and to investigate the effect of post-milking teat-dipping iodophor practice on iodine content in goat milk. Two groups of dairy goats (n=6 in each) were treated with different post-milking teat-dipping disinfection: iodine-free solution (iodine-free group) and iodine-based solution (4,000 μg/L) (iodophors group). Treatments were carried out for 19 experimental days, following a 14-day pre-experimental period, in which only iodine-free sanitizer was used for both groups. The results showed that Iodine concentrations in milk of all goats were 49 ± 23, 49, 17-86 μg/100g (mean ± SD, median, range) at days -3, -2, -1 and 45 ± 26, 42, 14-96 μg/100g (mean ± SD, median, range) at days 17, 18, 19 of treatment. Iodine concentration increased by 7 μg/100g (mean) in the iodophors group while iodine concentration decreased by 15 μg/100g by day 17-19 of treatment in the iodine free group. It was concluded that relatively high iodine concentrations were found in raw milk of dairy goats whose teats were dipped post-milking in disinfectants with or without iodine. Post-milking teat-dipping iodophor practice may increase iodine content in goat milk within an average period of 20 days. This information can help in controlling iodine content in goat milk and iodine intake in the public.
Iodophors; Iodine; Dairy goats; Post-milking Teat Disinfection; Iodine Intake; Public health
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Affiliation of the authors at the time of publication
Nutrition and Brain Health Laboratory, School of Nutritional Sciences; Institute of Biochemistry, Food Science and Nutrition; Robert H. Smith Faculty of Agriculture, Food and Environment; the Hebrew University of Jerusalem. Department of Animal Science, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, P.O. Box 12, Rehovot, 76100, Israel. Marine Research Institute (IMR) PO Box 1870 Nordnes, NO-5817 Bergen, Norway.
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The Israel Journal of Veterinary Medicine is available as an open, online journal for veterinarians worldwide.
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