Wong A C, Bergdoll M S
Food Research Institute, University of Wisconsin, Madison 53706.
Infect Immun. 1990 Apr;58(4):1026-9. doi: 10.1128/iai.58.4.1026-1029.1990.
The kinetics of toxic shock syndrome toxin 1 (TSST-1) production by Staphylococcus aureus was studied in a fermentor in which aeration rate, atmospheric composition, pH, and temperature were controlled. The toxin was synthesized at a maximal rate during the exponential phase. High bacterial populations were not necessarily accompanied by high TSST-1 yields. Aerobiosis increased TSST-1 production, but excessive aeration had an adverse effect. Addition of CO2 enhanced TSST-1 yield by increasing toxin production rate and efficiency. Cultures with no pH control made more TSST-1 than those maintained at pH 5.5 to 7.5. Maximum TSST-1 yields were obtained when cultures were supplied with air (20 cm3/min) and CO2 (5 cm3/min) via a sintered glass sparger.
在一个可控制通气速率、大气成分、pH值和温度的发酵罐中,对金黄色葡萄球菌产生毒性休克综合征毒素1(TSST-1)的动力学进行了研究。毒素在指数生长期以最大速率合成。高细菌数量不一定伴随着高TSST-1产量。需氧环境增加了TSST-1的产生,但过度通气有不利影响。添加二氧化碳通过提高毒素产生速率和效率来提高TSST-1产量。未控制pH值的培养物比维持在pH 5.5至7.5的培养物产生更多的TSST-1。当通过烧结玻璃曝气器向培养物供应空气(20立方厘米/分钟)和二氧化碳(5立方厘米/分钟)时,可获得最大TSST-1产量。