Mammalian milk microorganisms, compositions containing them and their use for the treatment of mastitis

A probiotic strain or a mixture of strains consisting of lactic acid bacteria or bifidobacteria strains present in the fresh milk from a mammalian species selected in lactic acid culture media, wherein said probiotic strain or mixture of strains (i) are capable of being transferred to the mammary gland after oral intake and/or colonise the mammary gland after its topical application, (ii) are able to reduce the rates of survival and/or the rates of adhesion to epithelial cells of Staphylococcus aureus, and (iii) capable of protecting animals from mastitis, characterised in that the strain is selected from the group consisting of Bifidobacterium breve deposited in the CECT under Accession No. 7263, Bifidobacterium breve deposited in the CECT under Accession No. 7264, Lactobacillus reuteri deposited in the CECT under Accession No. 7260, Lactobacillus plantarum deposited in the CECT under Accession No. 7262, Lactobacillus fennenturn in the CECT under Accession No. 7265 and Lactobacillus reuteri deposited in the CECT under Accession No. 7266, Enterococcus hirae deposited in the CECT under Accession No. 7410, Lactobacillus plantarum deposited in the CECT under Accession No. 7412, Enterococcus faecalis deposited in the CECT under Accession No. 7411, Lactobacillus salivarius deposited in the CECT under Accession No. 7409, Lactobacillus reuteri deposited in the CECT under Accession No. 7413.