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Updated: Jul 10, 2026

Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production

Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production

Published on: March 2, 2014

Evolution of virulence: triggering host inflammation allows invading pathogens to exclude competitors.

Sam P Brown¹, Ludovic Le Chat, François Taddei

¹Section of Integrative Biology, University of Texas at Austin, Austin, TX 78712, USA. sam.brown@cantab.net

Ecology Letters

|November 21, 2007

Summary

Invading pathogens can overcome competition by provoking host immunity and resisting it, a strategy successful in heterogeneous hosts. This proactive invasion benefits pathogens by altering the environment to their advantage.

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Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production

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Using a Bacterial Pathogen to Probe for Cellular and Organismic-level Host Responses

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Published on: February 22, 2019

Area of Science:

Evolutionary ecology
Parasitology
Immunology

Background:

Virulence traditionally viewed as host-to-pathogen resource transfer.
Parasite competition is a key factor in host-pathogen dynamics.

Purpose of the Study:

Propose a new framework for understanding pathogen virulence.
Investigate the 'proactive invasion' strategy where invaders modify the host environment.
Explain how pathogens can overcome resident competitors.

Main Methods:

Analysis of a general ecological model of proactive invasion.
Modeling pathogen strategies involving immune provocation and resistance.
Examination of host heterogeneity's role in evolutionary dynamics.

Main Results:

Virulent immune-provoking behaviors and enhanced immune resistance are joint pathogen tactics.
Pathogens can win by creating novel immunological challenges to which they are adapted.
The 'proactive invasion' strategy, involving environmental modification, is favored in heterogeneous host populations.

Conclusions:

Host heterogeneity resolves the evolutionary conundrum of proactive invasion.
Emerging empirical findings support the model of immunological mediation in parasite competition.
Pathogen success can stem from manipulating host immunity and environment to eliminate competitors.