Control of Worms in Ruminants by Chemotherapy

Abstract

Many chemicals were tried for worm control in domestic animals during the nineteenth century, but a major advance was made in 1938 by the introduction of phenothiazine. The use of this material in preparations for sheep and cattle now reaches hundreds of millions of doses a year. A new chemical, methyridine, is active against many genera of worms throughout their development stages and thus approaches the ideal in anthelmintics.