Selenium and iodine status of sheep in the Markazi province, Iran

Abstract

The aim of this study was to provide preliminary quantitative information on selenium and iodine statusof sheep in Markazi province, Iran. Selenium and iodine status of grazing sheep were measured for 57different flocks in 14 regions over one year. The districts were selected to represent major sheep growingareas in the province. Blood samples were collected from 2 to 3-year-old ewes during summer, autumn andwinter. Samples were analyzed for blood glutathione peroxidase (GSHpx) activity and plasma inorganiciodine. There were significant differences between regions and seasonal differences in terms of blood GSHpxactivity and plasma inorganic iodine concentration (P