RESEARCH ON OPTIMIZATION OF FORMULA OF SS AGAR WITH SCORING METHOD
应用分值计算法优选SS琼脂配方的研究

Four batches of SS agar were qualified as substandard products with Scoring Method (score < 56.125).The main problem was weak ability in inhibiting the growth of E. coli and promoting the growth of S.typhimurium and S. dysenteriae. Tests for optimizing the formula of SS agar were conducted. Amoung these tests,the contents of some components were variant. The results showed that 0.5% cholate inhibited the growth of E.coli at an ideal level but also inhibited the growth of S. typhimurium and S. dysenterias. 0.3% cholate had noobvious effects in iuhibiting E. coli. 0.070% feric citrate and 0.15% sodium citrate could lessen the toxicity ofcholate to S. typhimurium with no effects in protecting S. dysenteriae.