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[Adaptive ultrastructural changes in soil-resident Yersinia pseudotuberculosis bacteria].

L M Somova, L S Buzoleva, A S Isachenko

    Zhurnal Mikrobiologii, Epidemiologii I Immunobiologii
    |July 13, 2006
    PubMed
    Summary

    Yersinia pseudotuberculosis bacteria undergo significant ultrastructural changes when living in soil for extended periods. These adaptive responses, influenced by temperature and duration, include altered cell walls, DNA, and storage substance accumulation.

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    THE STRUCTURAL CHANGES OF MACROPHAGES INFECTED WITH TICK-BORNE ENCEPHALITIS VIRUS.

    Tsitologiia·2018

    Area of Science:

    • Microbiology
    • Environmental Science
    • Cell Biology

    Context:

    • Investigating bacterial adaptation in soil environments.
    • Understanding the effects of prolonged residence and temperature on microbial ultrastructure.
    • Focusing on Yersinia pseudotuberculosis survival strategies.

    Purpose:

    • To characterize the ultrastructural changes in Yersinia pseudotuberculosis under simulated soil conditions.
    • To determine the influence of temperature, residence duration, and bacterial strain on these adaptations.
    • To elucidate the mechanisms of bacterial adaptation to nutrient-limited environments.

    Summary:

    • Prolonged residence (1 month to 2 years) of Yersinia pseudotuberculosis in soil columns at 6-8°C and 18-20°C induced complex ultrastructural alterations.

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  • Observed changes included modifications in cell walls, capsule and slime formation, ribosomal content, and nucleoid DNA conformation.
  • Adaptation to nutritional deficit led to the accumulation of storage substances like polyphosphates and poly-beta-oxibutyric acid.
  • Temperature significantly affected mitotic division and chromatin state, highlighting its role in bacterial adaptation.

    • Impact:

    • Provides insights into the resilience and survival mechanisms of Yersinia pseudotuberculosis in soil.
    • Contributes to understanding microbial adaptation to environmental stressors.
    • Informs ecological studies and potential implications for soil-borne pathogens.