[Lysogenic clones of wild-type plague bacteria and characteristics of the phages produced by them]

Comparative population analysis of 3 lysogenic clones of plague bacteria of wild type by lysogenic properties demonstrated that they failed to show any difference from one another by immunity to homolgous and heterologous phages, but differed by the number of cells capable of producing the phage spontaneously. Lysogenic properties were transmitted by heredity both after the ten-fold passage in the presence of a homologous antiphage serum and after a 10-fold colning. Phages produced by the wild lysogenic clones of plague bacteria were capable of provoking lysogenization of bacteria sensitive to it, they were serologically affiliated and differed by the range of action on plaque and pseudotuberculosis bacteria sensitive to it.