[The structure of cholera phages 493 and 7227]

Electron microscopy and optic diffraction methods were used to determine the main parameters of the morpho-structural organization of cholera phages 493 and 7227. The shape of phage capsids was established, the spiral type of symmetry of phage processes revealed, their adsorption apparatuses described, the number of morphological subunits comprising capsids and process envelopes, and some other parameters determined. It is assumed that the phages under study are new varieties of bacteriophages belonging to the fifth morphological group (according to the classification of A.S. Tikhonenko).