title: Parasite-host coevolution.
abstract: Parasite-host coevolution can have many different endpoints, not simply the commensalism of 'conventional wisdom'. Empirical studies and mathematical models are elucidating the conditions under which parasite-host systems can coevolve to intermediate and high levels of parasite virulence - and when they can coevolve to commensalism and mutualism.
authors.affiliation: Catherine Toft is at the Dept of Zoology, University of California, Davis, CA 95616, USA; Andrew Kanter is at the Dept of Epidemiology and Preventive Medicine, School of Veterinary Medicine, University of California, Davis, CA 95616, USA.
authors.forename: C A
authors.initials: CA
authors.lastname: Toft
authors.forename: A J
authors.initials: AJ
authors.lastname: Karter