[Phage typing of nonagglutinating vibrios isolated in the territory of the USSR].

The work presents the results of the phage typing of 2,437 NAG vibrio strains isolated in the USSR from patients and carriers (374 strains), from open water basins (1,675 strains), from sewage (234 strains) and from bottom silt (172 strains). Phage typing was carried out with a set of 5 phages capable of lyzing enteropathogenic NAG vibrios (phages TEPV 1, 2, 3, 4, 5). NAG vibrios isolated from humans were sensitive to phages TEPV in 45% of cases and NAG vibrios isolated from the environment, only in 29.

Basic criteria and classification scheme for bacteriophages acting against cholera vibrios of the classical and El Tor biotypes.

In accordance with the principles, nomenclature and taxonomic tests recommended by the TCNV for the systematization of viruses, cholera and El Tor phages were classified in all categories of the taxonomic hierarchy. On the basis of this classification, all known cholera bacteriophages could be affiliated to the biological type Vira, sub-type Deoxyvira, class 2/D B -- Deoxybinala, family Phagoviridae, genus Phagovirus vibrio and species Phagovirus cholerae. Phagovirus cholerae includes homologous series III-D, IV-D and V-D with 10 serologic types representing the smallest taxonomic units.

[Effect of sulfide water from natural springs on the properties of Vibrino cholerae].

The authors studied the properties of E1 Tor cholera vibrios isolated from sulfide water of the natural sources. There was demonstrated under experimental and natural conditions the influence of ecological conditions of sulfide water on such vibrio properties as cholerogenicity, sensitivity to diagnostic and typing phages, hemolytic activity and the value of the hemolysin-destructive factor. A short-liver stay of cholera vibrios in sulfide water was accompanied by some reduction of their virulence.