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应用系统优化技术对伤寒沙门氏菌培养及提纯工艺进行优化，筛选出适宜的培养和提纯条件，经发酵罐培养10罐，菌液浓度平均可达2．9×1010／ml，较优化前增加8×109／ml，每1×105／ml培养基可收获粗多糖8g以上，精多糖4g以上，分别比优化前提高1倍和4倍。
Optimization of culture and purification process of Salmonella typhi by application of system optimization technology, screening appropriate culture and purification conditions, the tank was cultured in a fermenter 10, the average bacterial concentration of up to 2.9 × 1010 / ml, compared with the prior increase of 8 × 109 / ml, each 1 × 105 / ml medium can be harvested more than 8g crude polysaccharides, polysaccharides 4g above, respectively, before the optimization of 1 times and 4 times.