Cited by 52Evolution and Genetic DynamicsMathematical and Theoretical Epidemiology and Ecology ModelsZoonotic diseases and public health

Multiple scales of selection influence the evolutionary emergence of novel pathogens

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Park, Miran, Loverdo, Claude, Schreiber, Sebastian J., Lloyd-Smith, James O.·2013·Philosophical Transactions of the Royal Society B: Biological Sciences

Abstract

When pathogens encounter a novel environment, such as a new host species or treatment with an antimicrobial drug, their fitness may be reduced so that adaptation is necessary to avoid extinction. Evolutionary emergence is the process by which new pathogen strains arise in response to such selective pressures. Theoretical studies over the last decade have clarified some determinants of emergence risk, but have neglected the influence of fitness on evolutionary rates and have not accounted for the multiple scales at which pathogens must compete successfully. We present a cross-scale theory for evolutionary emergence, which embeds a mechanistic model of within-host selection into a stochastic model for emergence at the population scale. We explore how fitness landscapes at within-host and between-host scales can interact to influence the probability that a pathogen lineage will emerge successfully. Results show that positive correlations between fitnesses across scales can greatly facilitate emergence, while cross-scale conflicts in selection can lead to evolutionary dead ends. The local genotype space of the initial strain of a pathogen can have disproportionate influence on emergence probability. Our cross-scale model represents a step towards integrating laboratory experiments with field surveillance data to create a rational framework to assess emergence risk.

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  1. Reperant LA, Kuiken T, Grenfell BT, Osterhaus ADME, Dobson AP. 2012 Linking influenza virus tissue tropism to population-level reproductive fitness. PLoS ONE 7, e43115. (doi:10.1371/ journal.pone.0043115) · DOI

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Authors
Park, M., Loverdo, C., Schreiber, S. J., & Lloyd-Smith, J. O.
Affiliations
  • University of California, Los Angeles (US)
  • University of California, Davis (US)
  • 1
Corresponding author
Park, Miran
Venue
Philosophical Transactions of the Royal Society B: Biological Sciences
Published
2013-03-19
Volume
368
Issue
1614
Pages
20120333-20120333
ISSN
  • 0962-8436 (ISSN-L)
  • 1471-2970
OpenAlex
W2171590867
Cited by
51
References
69
Citations by year
2026: 1 · 2025: 2 · 2024: 3 · 2023: 1 · 2022: 2 · 2021: 7 · 2020: 2 · 2019: 8 · 2018: 6 · 2017: 3 · 2016: 5 · 2015: 3 · 2014: 5 · 2013: 3
FWCI
3.54
Type
journal article
Language
en
Open access
Locations
  • Philosophical Transactions of the Royal Society B Biological Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
National Institute of General Medical Sciences (T32GM008185)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Evolution and Genetic Dynamics
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Mathematical and Theoretical Epidemiology and Ecology Models
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Zoonotic diseases and public health
Keywords
evolutionary emergence, novel pathogens, fitness landscape, stochastic population models, genotype space, host adaptation, antimicrobial resistance
MeSH terms
Computer Simulation, Biological Evolution, Genotype, Humans, Models, Genetic, Selection, Genetic, Communicable Diseases, Emerging, Host-Pathogen Interactions, Genetic Fitness

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