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Related Experiment Videos

[Host spectrum and virulence]

C Combes1

  • 1UMR CNRS 5555, Université de Perpignan, France.

Medecine Tropicale : Revue Du Corps De Sante Colonial
|January 1, 1997
PubMed
Summary
This summary is machine-generated.

Infectious agents in fragmented environments can create source-sink systems, leading to varied virulence. This explains why shared human-animal infections remain severe and don

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Area of Science:

  • Parasitology
  • Evolutionary Biology
  • Epidemiology

Context:

  • Anthropozoonoses involves infectious agents transmitted between humans and animals.
  • Fragmented environments and varying host reproductive success create asymmetric gene flow.
  • This can lead to the establishment of source-sink systems for infectious agents.

Purpose:

  • To explain the dynamics of infectious agent virulence in fragmented host environments.
  • To explore how source-sink systems influence parasite evolution.
  • To understand the persistence of virulence in shared human-animal pathogens.

Summary:

  • Fragmented anthropozoonoses environments with multiple host species can create source-sink systems.
  • Asymmetric gene flow due to varying host reproductive success drives virulence.

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  • Optimal virulence is selected in source hosts, while sink hosts experience sub- or super-optimal virulence, explaining persistent infection severity.

    • Impact:

    • Provides insight into the gravity and persistence of zoonotic diseases.
    • Helps understand evolutionary pressures on pathogens shared between humans and animals.
    • Informs strategies for managing infectious diseases at the human-animal interface.