[The plasmid composition and pathogenetic characteristics of Yersinia pseudotuberculosis strains isolated from human subjects against a background of epidemic and sporadic morbidity].

112 newly isolated clinical cultures of Y. pseudotuberculosis have been studied. The strains have been characterized by the presence of plasmids and pathogenicity signs associated with plasmids.

[Numerical analysis of the phenotypic properties and total genomic characteristics of strains of Yersinia pestis related to different subspecies].

The numerical analysis of the phenotypical properties of Y. pestis strains, classified with 5 subspecies by 60 signs, was carried out. In comparing the properties of strains belonging to the main (nomenclature) subspecies with strains of other subspecies, the similarity index varied within the range 82-95%.

[Quantitative characteristics of the survival phenomenon in experimental plague].

The method for the quantitative evaluation of the effect of the survival phenomenon is proposed, which makes it possible to carry out the rapid single-stage determination of the immunogenicity of Pasteurella pestis avirulent strains. The low specificity of the survival phenomenon in plague has been shown. The accumulation of immunogenic avirulent cells in the population of virulent P.