[Effect of some trace elements on Heterakis gallinarum invasion]

It was found that sodium chloride at the rate of 0.5 per cent in the mixtures lowers by 25 times the survival of the Heterakis helminths in birds, prevents the manifestation of verminous typhlitis, alters the ratio between the female and the male worms in favour of the latter, contributes to the increase in body weight and rises the level of the total protein in the blood serum, and changes the protein spectrum raising the level of globulins. Positive results at a lower size were established in feeding cobaltinitrite and soduim selenite to birds. Last ranked the effects produced with the offer of zinc sulfate. The admixture of sodium chloride at the rate of 0.5 per cent of birds is suggested both from the standpoint of Heterakis control and prophylaxis and from the point of view of pathogenesis.