title: [Biological characteristics of the variants of Bacillus thuringiensis subsp. galleriae formed during continuous culture].
abstract: Bacillus thuringiensis subsp. galleriae S. variants formed during continuous cultivation differ from the parent culture in certain properties. In contrast to the parent R form, their growth in the chemostat does not yield virulent mutants which can cause their lysis on solid media. The chemostat S forms are resistant against virulent phage mutants produced when the R variants are grown under the conditions of continuous cultivation and against a virulent phage obtained from the parent culture 69-6 under the action of vancomycin. The R forms are sensitive to these phages. When the S forms are grown under the chemostat conditions, they do not revert to the R forms. The R and S forms do not differ noticeably in the character of their growth, formation of spores and crystals, and biological activity.
mesh_terms: D001413:Bacillus thuringiensis / Q000502:physiology*; D001433:Bacteriolysis; D001435:Bacteriophages / Q000472:pathogenicity; D014644:Genetic Variation; D009154:Mutation; D013171:Spores, Bacterial / Q000254:growth & development; D014774:Virulence
vernacular_title: O nekotorykh biologicheskikh osobennostiakh variantov Bacillus thuringiensis subsp. galleriae, obrazuiushchikhsia pri nepreryvnom kul'tivirovanii.