Richardson S H
J Bacteriol. 1969 Oct;100(1):27-34. doi: 10.1128/jb.100.1.27-34.1969.
The development of a new semisynthetic medium which stimulates in vitro production of the skin permeability factor (PF) by Vibrio cholerae is described. The effects of pH, aeration, temperature, and length of incubation on PF formation or release in strain 569B and several other strains, or both, are compared. Data are presented which show that maximal PF accumulation occurs during a transitional period of growth joining the exponential and stationary phases of the growth cycle. PF elaboration is completed well ahead of any visible signs of lysis in the culture and the PF activity appears to be proportional to the length of the linear growth phase. Possible mechanisms of toxigenicity and the nature of PF are discussed.
本文描述了一种新型半合成培养基的研发,该培养基可刺激霍乱弧菌在体外产生皮肤渗透因子(PF)。比较了pH、通气、温度和培养时间对569B菌株及其他几种菌株中PF形成或释放的影响,或对两者的影响。所呈现的数据表明,PF的最大积累发生在生长周期中连接指数生长期和稳定期的过渡生长阶段。PF的合成在培养物出现任何可见裂解迹象之前就已完成,且PF活性似乎与线性生长阶段的长度成正比。文中还讨论了产毒的可能机制以及PF的性质。