Scaling of Host Competence.

Authors:
Cynthia J Downs
Cynthia J Downs
University of Nevada
Barbara A Han
Barbara A Han
Oregon State University
United States
Jon F Harrison
Jon F Harrison
Arizona State University
United States
Lynn B Martin
Lynn B Martin
University of South Florida
United States

Trends Parasitol 2019 03 29;35(3):182-192. Epub 2019 Jan 29.

Global and Planetary Health, University of South Florida, Tampa, FL 33620, USA.

Body size influences many traits including those that affect host competence, the propensity to cause new infections. Here, we employ a new framework to reveal that, for at least two infections, West Nile virus and Lyme disease, large hosts should be more competent than small ones, but their lower abundance could mitigate their impacts on local risk. By contrast, for rabies, small hosts will be disproportionately more competent than large ones, an effect amplified by the higher densities of small species. These outcomes differ quite a bit from previous approaches that incorporate allometries into epidemiological models. Subsequently, we advocate for future integrative work to resolve how interspecific variation in body size influences the emergence and spread of infections.

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Source
http://dx.doi.org/10.1016/j.pt.2018.12.002DOI Listing
March 2019
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