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Related Experiment Videos

Experimental evolution of parasites

D Ebert1

  • 1Universität Basel, Zoologisches Institut, Rheinsprung 9, 4051 Basel, Switzerland. ebert@ubaclu.unibas.ch

Science (New York, N.Y.)
|November 20, 1998
PubMed
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Serial passage experiments reveal how parasite evolution impacts virulence. Understanding these changes in new hosts is key to managing diseases and developing vaccines.

Area of Science:

  • Evolutionary biology
  • Microbiology
  • Parasitology

Background:

  • Serial passage experiments are a key tool in experimental evolution, particularly in applied sciences like vaccine development.
  • These experiments allow real-time monitoring of molecular and phenotypic evolution in parasites.
  • Parasite evolution within a host often leads to increased virulence in new hosts and decreased virulence in former hosts, suggesting a fitness trade-off.

Purpose of the Study:

  • To investigate the evolutionary dynamics of parasite virulence using serial passage experiments.
  • To understand the causes and consequences of parasite evolution in real time.
  • To explore the discrepancy between observed virulence escalation in experimental settings versus natural populations.

Main Methods:

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  • Conducting serial passage experiments with parasites.
  • Monitoring molecular and phenotypic changes during experimental evolution.
  • Analyzing the trade-offs in parasite fitness across different hosts.

    • Main Results:

    • Observed an increase in parasite virulence in new hosts during serial passage.
    • Documented a decrease in parasite virulence towards former hosts, indicating a fitness trade-off.
    • Highlighted the potential for real-time insights into parasite evolution.

    Conclusions:

    • Serial passage experiments provide valuable insights into parasite virulence evolution.
    • Understanding host-specific fitness trade-offs is crucial for managing parasite virulence.
    • Further research is needed to reconcile experimental findings with patterns in natural populations for disease management.