[Effect of levamisole on the level of antihemagglutinins, serum sialic acid and lysozyme in the aerosol vaccination of chickens against Newcastle disease].

: Tested was the effect of the levamisole antihelminthic on the dynamic of anti-hemagglutinins, serum sialic acid, and lysozyme in the process of building active immunity against Newcastle disease following aerosol vaccination. It was found that there was unidirectional correlation of the active immunologic process with the level of serum sialic acid and lysozyme. The use of levamisole in adequate doses, applied opportunely enhanced the unspecific humoral defense of the body, having no direct influence on the quality of actively built specific immunity.