A Suitable Culture Medium for the Production of Exopolysaccharide by Streptococcus salivarius subsp,thermophilus

A new culture medium for the synthesis of exopolysaccharide bystreptococcus salivarius subsp.thermophilus was formulated,based on MRS ,M17 ,ATP,SL ,Elliker,SDM usually used in lactic acid bacterium.The suitability of a semi-defined culture media (named LCX) was obtained.The formula of culture medium was optimized as ： peptone,1.50%,typtone,1.00% ; K2HPO4,0.20%; MgSO4.7H2O,0.02 % ; MnSO4.4H:O,50 mg · L-1 ;Tween 80,1ml · L-1 ;Sodium acetate,0.50% ;Sodium glycerate,1.90%.