In order to prevent the MMA syndrome in pigs there were administered a fimbrial vaccine based on K88, P987 and F41 antigens and Suimastivac containing the antigens of E. coli, Klebsiella pneumoniae, Staphylococcus aureus and Streptococcus faecalis. Vaccinations were conducted twice on 4 and 2 weeks before parturition. The fimbrial vaccine in a dose of 5 ml per animal was applied in 369 sows and Suimastivac in a dose of 10 ml in 78 sows and in a dose of 5 ml in 80 sows. Following vaccination with Suimastivac in a dose of 10 ml there was observed a decrease of MMA occurrence from 20 to 12.8 per cent. In other experimental groups no significant differences regarding morbidity of sows were noted.
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