[A comparative study of ultrastructural organization of the nonagglutinating vibrios and the causative agents of cholera].

A common plan of ultrastructural organization was revealed in a comparative study of the ultrastructure of the nonagglutinating El Tor and cholera vibrios: the presence of a three-layer cell wall and cytoplasmic membrane, the presence of vesicles on the external layer of the cell wall or between the cell wall and the cytoplasmic membrane; identity of the intracytoplasmic membranous structures; the presence of intracytoplasmic inclusions in the form of granules of various size and electron density; cell division by means of a band with the formation of two cells of equal size or of many bands in one cell, and also by the joining of the cytoplasmic membrane with the formation of rings at the sites of cell division. Identify of the ultrastructure of the vibrios under study can serve as confirmation of the views of the investigators who consider that nonagglutinating vibrios should be referred to a single V. cholerae species.