[Cytology of the microflora of yogurt].

Changes in the cell wall and various stages of lysis become manifested on the 1-2 day of development of the yogort bacteria. Heteromorphous individuals appear both in the culture of streptococci and rods. The nuclear apparatus of the yogort bacteria is exteremely polymorphous whereas in the streptococci it undergoes changes from compact nucleoids which are either round or crescent shaped or take the form of massive super-nuclei in heteromorphous individuals. A certain dynamics of fat and metachromatin (volutin) was noted in the process of the development of the culture. The presence of correlation was shown among the maximal fermentative activity of the culture, the beginning of lysis, the appearance of heteromorphous forms and volutin accumulation.