title: [Increased invasiveness as one of the manifestations of phenotype variability of the plague microbe in fleas].
abstract: Experimental studies conducted on genetically connected virulent subcultures of Y. pestis showed that the death of albino mice infected by flea bite occurred earlier than in the animals infected by a syringe subcutaneously. A high invasiveness of Y. pestis subcultures isolated from fleas (in comparison with the initial strains and subcultures from the animals) persisted for 2--3 passages in their cultivation on artificial nutrient media.
mesh_terms: D000818:Animals; D007303:Insect Vectors; D051379:Mice; D010641:Phenotype; D010930:Plague / Q000382:microbiology* / Q000401:mortality; D005423:Siphonaptera / Q000382:microbiology*; D014774:Virulence; D015010:Yersinia pestis / Q000235:genetics / Q000472:pathogenicity*
vernacular_title: Povyshenie invazivnosti kak odno iz proiavleniĭ fenotipicheskoĭ izmenchivosti chumnogo mikroba v blokhakh.