[Production and study of the immunogenic properties of a bivalent inactivated vaccine against mucosal disease (bovine viral diarrhea and infectious rhinotracheitis)].

Bivalent inactivated vaccine against mucous disease (MD) and infectious rhinotracheitis (IR) in cattle was produced from cell cultural MD and IR virus suspensions. The vaccine was concentrated on aluminium hydroxide, inactivated by ethanol and is without residual virus. Saponine in final 1:1500 dilution is added as supplementary adjuvant. Immunogeneity of the vaccine was tested on 10-month-old calves, which had shown full resistance against experimental infection with virulent strains of both viruses. Testing on calves for harmlessness by use of a five-fold higher vaccine dose indicated complete tolerance of the vaccine. The prophylactic effect of the vaccine applied in practical work to directly threatened with immediate MD and IR infection cows, including pregnant ones, consisted in reduced number of cases of abortion, of inborn malformations, in lower neonatal calf death-rate, etc. No disturbances were observed following two-fold vaccination of the animals, a fact proving its harmlessness. The positive results of the studied vaccine allow its further application in the combined prophylaxis of MD and IR in calf fattening and breeding complexes.