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[Changes in the clonal structure of staphylococcal populations in a kidney infection model in mice]
Abstract:
The intraperitoneal infection of mice with previously titered doses of staphylococci has been found to regularly induce the formation of the foci of inflammation in the kidneys of mice, from which staphylococcal cultures has been obtained by the inoculation of the kidney material for 8 days (the term of observation). The use of this model has made it possible to carry out the dynamic study of structural changes in the populations of staphylococci by studying the biological properties of 100 subcultures isolated from the kidneys of the infected animals dissected every 24 hours. A decrease in the heterogeneity of the initial population, occurring due to a drop in the number of clones with hemolytic activity, lecithinase activity and smooth variants, has been registered. Thus, the proposed model permits the study of changes in the clonal structure of the populations of the infective agent, appearing under the influence of the protective capacity of the body in the dynamics of the infectious process.
Insights
This study introduces a mouse model for staphylococcal kidney infections, revealing dynamic changes in bacterial populations. The research observed a decrease in bacterial heterogeneity, indicating host-induced adaptations during infection.
Area of Science:
- Microbiology
- Immunology
- Pathogenesis
Context:
- Staphylococcal infections can lead to kidney inflammation.
- Understanding bacterial population dynamics during infection is crucial for developing effective treatments.
Purpose:
- To develop and validate a mouse model for studying staphylococcal kidney infections.
- To dynamically analyze structural changes in staphylococcal populations within the host.
- To investigate the impact of host immune responses on bacterial clonal structure.
Summary:
- Intraperitoneal staphylococcal infection in mice reliably induces kidney inflammation and bacterial foci.
- A dynamic study of 100 subcultures isolated over 8 days revealed a decrease in initial staphylococcal population heterogeneity.
- This decrease was characterized by a reduction in clones exhibiting hemolytic activity, lecithinase activity, and smooth variants.
Impact:
- The established mouse model allows for dynamic investigation of infectious agent population changes.
- This research provides insights into bacterial adaptation and evolution under host immune pressure.
- Findings contribute to understanding host-pathogen interactions in staphylococcal infections.