THE EFFECT OF BIOLOGICALLY ACTIVE PREPARATIONS ON HUMORAL IMMUNITY OF COWS AND CALVES IN ADVERSE ENVIRONMENTAL CONDITIONS
The results of studying the effect of recombinant bovine interferons alpha- and gamma- and their combination with dimethyl diprazolyl selenide and aminoseleton on the serological profile to viral antigens of dry cows during their immunization with «Combovac» vaccine and the presence of colostral antibodies in calves are presented. There was stated a positive effect of interferons α- and γ- alone and their combination with selenium-containing and tissue preparations on the formation of post-vaccination humoral immunity to (PIV) type 3, IBR, VD-MMD and RSV infection in cows and colostral immunity in calves.