[Immunoprophylaxis and serodiagnostic studies of abortion in cows caused by bacteria of the Mimeae group and the genus Yersinia].

Tested was the prophylactic effect of a vaccine against abortions in cows caused by bacteria immunologically related to R Brucella organisms. Results pointed to the substantial drop in the number of abortions in the vaccinated animals. Reported are also results of serologic investigations by the complement-fixation test with cows showing abortions and sterility.