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Sociality and parasite transmission.

Paul Schmid-Hempel1

  • 1Institute of Integrative Biology (IBZ), ETH Zürich, ETH-Zentrum CHN, Universitätstrasse 16, CH-8092 Zürich, Switzerland.

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Summary
This summary is machine-generated.

Parasite transmission success in social hosts depends on factors like distance and host genetics. Selection favors defenses against within-group spread, especially among related individuals.

Keywords:
Generalized distanceGeneticsParasite fitnessSocial immunitySocialityTransmission

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Area of Science:

  • Parasitology
  • Evolutionary Biology
  • Social Behavior

Background:

  • Parasites and social hosts exhibit diverse relationships.
  • Understanding selection pressures on these interactions is crucial.
  • Sociality significantly alters parasite transmission pathways compared to solitary hosts.

Purpose of the Study:

  • To identify key factors determining parasite fitness in social hosts.
  • To define a 'generalized transmission distance' integrating various transmission elements.
  • To understand the evolutionary drivers of host defenses in social groups.

Main Methods:

  • Analysis of fitness parameters for parasites and social hosts.
  • Conceptual framework integrating spatial, genetic, and ecological factors.
  • Defining 'generalized transmission distance' to quantify transmission success.

Main Results:

  • Sociality primarily impacts parasite transmission through altered pathway structures.
  • Short-distance, genetically similar host transmission is most common in social groups.
  • Spatio-genetical distances are identified as the main drivers of parasite fitness.

Conclusions:

  • Parasite fitness in social hosts is largely driven by transmission dynamics within the group.
  • Host defenses are likely to evolve to counter within-group parasite spread.
  • Understanding these dynamics is key to predicting host-parasite co-evolution.