Acta Vet. Brno 2021, 90: 431-438

Iodine content in goat and sheep milk related to herd size, seasonality, farming practice and breed effect

Marcela Klimešová1, Lenka Vorlová2, Hana Zachovalová2, Aleš Dufek1, Ludmila Křížová3, Lucia Hodulová2, Oto Hanuš1, Miroslav Skřivánek1, Hana Nejeschlebová1

1Dairy Research Institute, Prague, Czech Republic
2University of Veterinary Sciences Brno, Faculty of Veterinary Hygiene and Ecology, Department of Hygiene and Technology of Food of Animal Origin and Gastronomy, Brno, Czech Republic
3University of Veterinary Sciences Brno, Faculty of Veterinary Hygiene and Ecology, Department of Animal Breeding, Animal Nutrition and Biochemistry, Brno, Czech Republic

Received March 24, 2021
Accepted November 9, 2021

Iodine is a milk micronutrient whose concentration is highly variable and depends on several factors. The aim of this work was to monitor the prevailing concentration of iodine in raw goat (n = 71) and sheep (n = 68) milk from farms in the Czech Republic, to assess the variation in iodine levels and evaluate them with farming practices, herd size, breed and season. Iodine was determined by a spectrophotometric method according to Sandell-Kolthoff. The mean prevailing iodine concentration in goat and sheep milk was 249.73 and 264.21 μg/L, respectively. In addition to inter-species variability, we found statistically significant differences depending on the both sheep and goat herd size. The differences between conventional and organic farming were relatively minor and without statistical significance.


This research was supported by the Ministry of Agriculture of the Czech Republic, grant no. NAZV KUS QJ 1230044, MZe RO1420 and Internal Grant Agency of the UPVS Brno, grant no. 25/2014/ FVHE.


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