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Monitoring Intraspecies Competition in a Bacterial Cell Population by Cocultivation of Fluorescently Labelled Strains
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Published on: January 18, 2014

Bacterial persistence as a phenotypic switch.

Nathalie Q Balaban1, Jack Merrin, Remy Chait

  • 1Laboratory of Living Matter and Center for Studies in Physics and Biology, Rockefeller University, 1230 York Avenue, New York, NY 10021, USA. nathalieqb@phys.huji.ac.il

Science (New York, N.Y.)
|August 17, 2004
PubMed
Summary
This summary is machine-generated.

Bacterial populations exhibit persister cells that survive antibiotics without genetic mutation. These persister cells, arising from phenotypic switching, have slower growth rates and are crucial for understanding bacterial infections and adaptation.

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Area of Science:

  • Microbiology and Microbial Physiology
  • Bacterial Stress Response and Adaptation

Background:

  • A small fraction of microbial populations can survive antibiotic treatment without genetic resistance.
  • These surviving cells, known as persister cells, do not pass on resistance traits to their progeny.
  • Understanding the mechanisms behind bacterial persistence is vital for combating infections.

Purpose of the Study:

  • To investigate the phenomenon of bacterial persistence at the single-cell level.
  • To explore the role of preexisting heterogeneity in microbial populations regarding persistence.
  • To develop a quantitative model describing the switch to persister cell formation.

Main Methods:

  • Utilized microfluidic devices for high-resolution observation of single bacterial cells.
  • Monitored phenotypic switching between actively growing cells and persister cells.
  • Performed quantitative measurements to analyze the dynamics of persistence.

Main Results:

  • Persistence in Escherichia coli was linked to inherent population heterogeneity.
  • Phenotypic switching was identified as the mechanism generating persister cells with reduced growth rates.
  • A mathematical model was developed to describe the persister cell switch.

Conclusions:

  • Inherent bacterial heterogeneity plays a significant role in adaptation to environmental fluctuations.
  • The findings provide insights into the survival strategies of bacteria in challenging conditions.
  • Understanding persister cell dynamics is crucial for developing new strategies against persistent bacterial infections.