Abstract
The toxic effects of 5 mg per kg body weight of selenium given as sodium selenite orally or parenterally to growing lambs were examined. There was considerable individual variation in both susceptibility to intoxication and the degree of pathological change displayed. The results affirm the previously reported deleterious effects on the cardiovascular, respiratory and urinary systems and highlight damage to secondary lymphoid tissue in various organs. The use of a histochemical method for detecting selenium bonds demonstrated correlation between the density of reaction-product and histopathological changes within tissues, and showed the distribution of selenium in other tissues in which the gross and histopathological findings were non-specific or minimal.
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