E. A. Strelkova

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Biofilms of a number of gram-positive and gram-negative bacteria (both environmental strains from the stratal waters of oil fields and collection strains) were found to exhibit higher resistance to extreme physicochemical factors (unfavorable temperature, pH, and salt concentration) than planktonic cultures. The extracellular polymers forming the structure(More)
259 The biofilms formed by pathogenic microorgann isms are responsible for a number of chronic infections resistant to antibiotic treatment [1]. The use of medii cal devices introduced into a macroorganism, such as catheters, artificial valves, etc. is hindered by biofilm formation [2–4]. Moreover, biofilms are among the major agents responsible for the(More)
517 We have previously presented results that indicated direct correlation between the ability to form a fully functional matrix and the sensitivity of microbial bio films to thermal, hyperosmotic, and acidic shock [1]. In particular, we compared the sensitivity to these fac tors in the pigment free (producing no violacein) strain Chromobacterium violaceum(More)
The dominant species and abundance of the cultured aerobic organotrophic bacteria were determined in the clean soils of the Republic of Vietnam. The total number of organotrophs varied from 2.0 × 105 to 5.8 × 108 CFU/g soil. A considerable fraction of the bacterial population (1.1 × 105–9.5 × 106 CFU/g soil) was able to utilize petroleum hydrocarbons as the(More)
The mechanisms of formation of persisting cells in planktonic and structured microbial populations are considered. The relations between persistence and adaptive mutagenesis are discussed. Persisting cells are suggested to be among the major objects of adaptive mutagenesis and act as an instrument of the microevolution processes in microbial biofilms.
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