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Effect of Arsanilic Acid in Counteracting Selenium Poisoning in Beef Cattle

South Dakota Agricultural Experiment Station, Brookings

Abstract

Three trials, two in the feedlot and one summer grazing, were conducted to determine the effectiveness of arsanilic acid in preventing selenium poisoning in beef cattle. The addition of 0.01% of arsanilic acid to a ration containing 12 p.p.m. of selenite selenium appeared to increase rate of gain and reduce slightly selenium poisoning symptoms. In the grazing trial, feeding 550 mg. of arsanilic acid per day appeared to increase daily gains in steers on naturally seleniferous range 0.16 lb. Treatment differences were not statistically significant in either the feedlot trials or the summer grazing study. No signs of arsenical toxicity were noted during the course of the experiments.

¹ Contribution from the Departments of Animal Husbandry and Station Biochemistry and approved for publication by the Director of the Agricultural Experiment Station as Publication No. 448 of the Journal Series.

² Grateful acknowledgement is made to Abbott Laboratories, North Chicago, Illinois, for supplying the arsanilic acid and for a grant-in-aid for partial support of this work.