[Effect of tuberculin and levamisole on the immune response after vaccinating calves against para-influenza and Salmonella infections].

Studied was the effect of tuberculin and levamizole on the immune response following vaccination of calves against parainfluenza and Salmonella infections. It was found that in calves that had colostrum antibodies against parainfluenza the immunogenic stimulation with the two agents first led to a drop of the total protein and of the antibody titer of the blood serum; in later periods the antibody titer grew severalfold. The stimulation with tuberculin and levamizole in the case of Salmonella infection substantiated more abrupt humoral immune response as against the case of animals that were not stimulated. More effective was the stimulation when lemvamizole was applied on the 7th day following vaccination. It was established that both tuberculin and levamizole stimulated the phagocytic activity of the blood of calves vaccinated against a parainfluenza virus and did not influence essentially the same activity in calves vaccinated against Salmonella infection. The amount of erythrocyte-rosette forming cells (E-POK) also remained visibly unchanged by the effect of tuberculin and levamizole with the use of the two vaccines.