How do pathogen evolution and host heterogeneity interact in disease emergence?

Yates, A. , Antia, R. and Regoes, R. R. (2006) How do pathogen evolution and host heterogeneity interact in disease emergence? Proceedings of the Royal Society of London Series B: Biological Sciences, 273(1605), pp. 3075-3083. (doi: 10.1098/rspb.2006.3681)

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Publisher's URL: http://dx.doi.org/10.1098/rspb.2006.3681

Abstract

Heterogeneity in the parameters governing the spread of infectious diseases is a common feature of real-world epidemics. It has been suggested that for pathogens with basic reproductive number R<sub>0</sub>>1, increasing heterogeneity makes extinction of disease more likely during the early rounds of transmission. The basic reproductive number R<sub>0</sub> of the introduced pathogen may, however, be less than 1 after the introduction, and evolutionary changes are then required for R<sub>0</sub> to increase to above 1 and the pathogen to emerge. In this paper, we consider how host heterogeneity influences the emergence of both non-evolving pathogens and those that must undergo adaptive changes to spread in the host population. In contrast to previous results, we find that heterogeneity does not always make extinction more likely and that if adaptation is required for emergence, the effect of host heterogeneity is relatively small. We discuss the application of these ideas to vaccination strategies.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Yates, Professor Andrew
Authors: Yates, A., Antia, R., and Regoes, R. R.
College/School:College of Medical Veterinary and Life Sciences > School of Infection & Immunity
Journal Name:Proceedings of the Royal Society of London Series B: Biological Sciences
Publisher:The Royal Society
ISSN:0962-8452
ISSN (Online):1471-2954
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