Evaluation of intraruminal devices for combined facial eczema control and trace element supplementation in sheep

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Intraruminal devices containing zinc oxide are very effective in preventing facial eczema in sheep. In the present study such devices augmented with various amounts of selenium and cobalt have been evaluated for their ability to improve the Se and CO status of pregnant ewes, as reflected by changes in blood Se and serum Vitamin B12 concentrations. Devices containing 16.4 mg of Se (as sodium selenate) and 20.4 mg of Co (as cobalt sulphate) were effective in increasing and maintaining elevated blood Se concentrations for at least 84 days and serum Vitamin B12 for 42 days. Such devices will therefore prevent trace element deficiencies in sheep as well as providing protection against facial eczema.

Keywords: Cobalt; Facial eczema; Gastrointestinal; Selenium; Sheep; Trace elements; Vitamin B12

Document Type: Research Article

Publication date: December 1, 1997

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