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Immunity, resistance and tolerance in bird-parasite interactions
1Biogéosciences, CNRS UMR 6282, Université de Bourgogne, Dijon, France.
Parasite Immunology
|June 27, 2013
Summary
Host immune responses, including resistance and tolerance, shape pathogen evolution. The immune system acts as a powerful engine driving parasite adaptation, influenced by defense strategies and immune-induced damage.
Area of Science:
- Evolutionary biology
- Immunology
- Pathogen-host interactions
Background:
- Pathogens and hosts evolve adaptations for exploitation and infection cost minimization.
- Hosts employ resistance (parasite clearing) or tolerance (low-cost infection endurance).
- The host immune system is central to both defense strategies.
Purpose of the Study:
- To discuss how host defense strategies influence parasite evolution.
- To explore the role of the immune system as an engine of parasite evolution.
- To examine these dynamics using avian malaria (Plasmodium sp.) and Mycoplasma gallisepticum as examples.
Main Methods:
- Literature review and discussion of recent work.
- Focus on host-pathogen co-evolutionary dynamics.
- Case studies involving avian pathogens.
Main Results:
- Host defense strategies (resistance vs. tolerance) impact parasite evolutionary trajectories.
- Parasites rapidly adapt to host environments due to short generation times.
- Immune system activity, including overreaction, drives parasite evolution.
Conclusions:
- Host immune responses are a significant driver of parasite evolution.
- The specific defense mechanism (resistance or tolerance) dictates the evolutionary path of the parasite.
- Understanding these interactions is crucial for managing infectious diseases in wildlife and domestic animals.
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