NOVEL LACTIC ACID BACTERIA SPECIES

摘要

The invention concerns a lactic acid bacteria strain (1), whereof the RNA ribosome 16S is characteristic of the genus Streptococcus (2), whose profile in crude proteins, obtained after migration of crude proteins on SDS-PAGE gel electrophoresis, is characteristic of that of the CNCM I-1926 lactic acid bacteria strain, but distinct from those of species recognised as belonging to the genus Streptococcus, namely S. acidominimus, S.agalactiae, S. alactolyticus, S. anginosus, S. bovis, S. canis, S. caprinus, S. constellatus, S. cricetus, S. cristatus, S. difficile, S. downei, S. dysgalactiae ssp. dysgalactiae, S. dysgalactiae ssp. equisimilis, S. equi, S. equi ssp. equi, S. equi ssp. zooepidemicus, S. equinus, S.ferus, S. gallolyticus, S. gordonii, S. hyointestinalis, S. hyovaginalis, S. iniae, S. intermedius, S. intestinalis, S. macacae, S. mitis, S. mutans, S. oralis, S. parasanguinis, S. parauberis, S. phocae, S. pleomorphus, S. pneumoniae, S. porcinus, S. pyogenes, S. ratti, S. salivarius, S. sanguinis, S. shiloi, S. sobrinus, S. suis, S. thermophilus, S. thoraltensis, S. uberis, S. vestibularis, S. viridans. The invention also concerns the use of said lactic acid bacteria strain, or a polysaccharide secreted by said strain, for preparing a food composition, in particular a lactic milk or fresh cheese. The invention further concerns a food or pharmaceutical composition comprising a lactic acid bacteria or a polysaccharide constituted by a chain of glucose, galactose and N-acetylglucosamine in a ratio of 3:2:1 respectively.