EFFECT OF LIZATES OF PROBIOTIC LACTOBACILL STRAINS ON THE PATHOGENIC MICROFLORA ISOLATED IN COWS WITH MASTITIS
The article is devoted to the study on the influence of the probiotic strain lysates, belonging to the Lactobacillus genus, isolated from the Euflorin-L, Acipol and Lactobifidol probiotic preparations, on pathogenic microorganisms in cow mastitis. It has been established that the species composition of mastitis pathogens is diverse, but the leading role in the occurrence of mastitis belongs to S.aureus, E.coli, S.agalactae. All isolated strains of microorganisms are characterized by the pathogenicity factors: they inactivate sIgA; hemolytic activity is inherent in most of them; all strains of S.aureus are characterized by plasma coagulase activity. As result of the study conducted, it was found that the lysate isolated from the strain L. acidophilus NK-1, isolated from the probiotic preparation Euflorin-L, had the greatest antagonistic activity. It completely suppressed the hemolytic activity of the isolated microorganisms, significantly reduced the plasma coagulase activity of S. aureus and had an inhibitory effect on the sIgA protease activity of all the microorganisms.