[The incidence of frequently occurring Sh. sonnei phage types in the GDR]

On the basis of literature data (from 1955 to 1970) and own studies (from 1962 to 1974) the authors present information on phage types of Sh. sonnei the most frequently encountered in the GDR. It was possible to trace the detection and the incidence of individual phage types at the territory of the republic (by time). In centralized typing there were obtained rather constant and standard results. Further improvement of phage typing and also its complex use together with other methods of typing is necessary in epidemiological practice.