Tapsall J W
J Med Microbiol. 1987 Aug;24(1):83-7. doi: 10.1099/00222615-24-1-83.
Group B streptococci produce both a pigment and a haemolysin. The requirements of group B streptococci for the formation and release of pigment and haemolysin are similar and have been examined to extend observations on the relationship between the two products. The amount of pigment and haemolysin extractable from actively metabolising washed-cell suspensions of group B streptococci varied with the atmosphere of incubation, the pH at which the extraction was carried out and the presence of Mg2+ ions. Both pigment and haemolysin were produced in significant amounts in all phases of the growth cycle. When conditions were established for obtaining maximum yields of haemolysin, its production correlated closely with pigment yields, but pigment did not function as a carrier for haemolysin. Formation of pigment, but not of haemolysin, increased in the presence of trimethoprim or higher concentrations of glucose. The composition of pigment produced in different conditions differed qualitatively and different strains of group B streptococci formed pigment of different appearance, suggesting that group B streptococcal pigment is composed of several different substances.
B族链球菌可产生一种色素和一种溶血素。B族链球菌形成和释放色素及溶血素的条件相似，已对此进行研究以拓展对这两种产物之间关系的观察。从处于活跃代谢状态的B族链球菌洗涤细胞悬液中可提取的色素和溶血素的量，会因培养环境、提取时的pH值以及Mg2+离子的存在而有所不同。在生长周期的所有阶段，色素和溶血素都会大量产生。当建立起获得最大溶血素产量的条件时，其产量与色素产量密切相关，但色素并非溶血素的载体。在甲氧苄啶或较高浓度葡萄糖存在的情况下，色素的形成会增加，但溶血素的形成不会增加。在不同条件下产生的色素成分在质量上有所不同，不同菌株的B族链球菌形成的色素外观也不同，这表明B族链球菌色素由几种不同物质组成。
