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Updated: Dec 12, 2025
09:00
Testing the Role of Multicopy Plasmids in the Evolution of Antibiotic Resistance
Published on: May 2, 2018
12.2K
Pathogen resistance may be the principal evolutionary advantage provided by the microbiome
Michael R McLaren1, Benjamin J Callahan1,2
1Department of Population Health and Pathobiology, North Carolina State University, Raleigh, NC 27607, USA.
Summary
Hosts cooperate with beneficial microbes (commensals) to enhance pathogen resistance. This symbiotic relationship is a key evolutionary advantage, influencing host evolution across life.
Area of Science:
- Microbial ecology
- Evolutionary biology
- Host-microbe interactions
Background:
- Organisms defend against pathogenic microbes but tolerate commensals.
- Commensals compete with pathogens, offering protection.
- Hosts may evolve to enhance this commensal-mediated defense.
Purpose of the Study:
- To explore host-commensal cooperation for pathogen resistance.
- To examine evolutionary pressures favoring commensal-biased competition.
- To identify host traits supporting cooperative immunity.
Main Methods:
- Review of existing literature on host-microbe competition.
- Analysis of evolutionary mechanisms favoring commensalism.
- Examples of host traits promoting beneficial microbial communities.
Main Results:
- Hosts actively cooperate with commensals for enhanced immunity.
- Natural selection can favor hosts that promote commensals over pathogens.
- Cooperative immunity may drive evolution of non-pathogen-related traits.
Conclusions:
- Pathogen resistance is a primary evolutionary benefit from the microbiome.
- Host-microbe cooperation is a significant driver of evolution.
- The microbiome's role in host evolution is multifaceted.
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