Evolution of Host Resistance to Parasite Infection in the Snail-schistosome-human System

Overview

Journal J Math Biol

Date 2011 Jul 21

PMID 21773836

Authors

Yiding Yang

Zhilan Feng

Dashun Xu

Gregory J Sandland

Dennis J Minchella

Affiliations

Soon will be listed here.

Abstract

The evolutionary strategies that emerge within populations can be dictated by numerous factors, including interactions with other species. In this paper, we explore the consequences of such a scenario using a host-parasite system of human concern. By analyzing the dynamical behaviors of a mathematical model we investigate the evolutionary outcomes resulting from interactions between Schistosoma mansoni and its snail and human hosts. The model includes two types of snail hosts representing resident and mutant types. Using this approach, we focus on establishing evolutionary stable strategies under conditions where snail hosts express different life-histories and when drug treatment is applied to an age-structured population of human hosts. Results from this work demonstrate that the evolutionary trajectories of host-parasite interactions can be varied, and at times, counter-intuitive, based on parasite virulence, host resistance, and drug treatment.

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