PMID: 8593773May 1, 1995Paper

The secretion of radioactive iodine (131J) into the milk of small ruminants following their experimental contamination

DTW. Deutsche tierärztliche Wochenschrift
E Panariti

Abstract

"Peak" levels of radioiodine (131J) in sheep and goats milk were reached between 12-24 hrs following their contamination. At the end of the nine days period for sheep and of 12 days period for goats, following a single contamination with the prescribed 131J dose, the radioiodine level is 0,25% of the contamination dose. Following a multiple biweekly radioiodine contamination, the corresponding radioactivity levels in milk are much higher than in blood. From the fourth day on, the ratio between the respective levels in milk and blood remains constant. Following a biweekly multiple contamination in goats, average concentration of 131J in thyroid is about 220% of the daily contamination dose, whereas the corresponding concentrations in milk and blood are 33% and 5% of the daily contamination dose. The corresponding values in sheep are 140% for thyroid and 26% and 3.5% for milk and blood. Chemicals used as "iodine metabolic inhibitors" do sensibly reduce radioiodine levels in milk, while simultaneously increasing the corresponding levels in blood.

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