[Heterogeneity of Shigella flexneri during selective synchronization]

The study of a number of main growth characteristics of S. flexneri (S) cells during the first and second cycles of their cultivation in a solid culture medium in Peshkov's chamber from seed material, nonsynchronized and synchronized by C. E. Helmstetter's method, has revealed that this method does not permit obtaining completely synchronized cultures. Four physiological cell clusters, differing in the time of generation, growth rate, size at the beginning and the end of the cycle and the time of adaptation, have been detected.