Streptococcus thermophilus strain producing exopolysaccharide

Details Streptococcus thermophilus strain producing exopolysaccharide Streptococcus thermophilus strain producing exopolysaccharide

C - Chemistry, Metallurgy

12

N

C12N 1/20 (2006.01) A23C 9/12 (2006.01) A23C 9/123 (2006.01) C08B 37/00 (2006.01) C12P 19/04 (2006.01)

Patent

CA 2488264

The invention relates to the field of exopolysaccharide producing lactic acid bacteria. The invention relates to methods and culture media for producing large amounts of expolysaccharides in safe and simple fermentation conditions. The invention more specific relates to the characterization of a Streptococcus thermophilus ST 111 strain producing a stable high-molecular-mass heteropolysaccharide, its use in functional starter cultures and its use in in food fermentation processes such as processes producing milk products, yoghurt and cheese for texture improvement and decreasing synersis during fermentation and in the fermented product.

L'invention concerne le domaine des exopolysaccharides produisant des bactéries d'acide lactique. On décrit des procédés et des moyens de culture permettant de produire de grandes quantités d'expolysaccharides dans des conditions de fermentation sûres et simples. Plus spécifiquement, l'invention concerne la caractérisation d'une souche de Streptococcus thermophilus ST 111 produisant un hétéropolysaccharide stable de poids moléculaire élevé, son utilisation pour des cultures fonctionnelles initiatrices et dans des processus de fermentation alimentaire (élaboration de produits laitiers, de yoghourts et de fromages, par exemple) ainsi que pour l'amélioration de texture et la diminution de la synérèse en cours de fermentation et dans le produit fermenté.

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