title: Host community structure and the maintenance of pathogen diversity.
abstract: Community structure has been widely identified as a feature of many real-world networks. It has been shown that the antigenic diversity of a pathogen population can be significantly affected by the contact network of its hosts; however, the effects of community structure have not yet been explored. Here, we examine the congruence between patterns of antigenic diversity in pathogen populations in neighbouring communities, using both a deterministic metapopulation model and individual-based formulations. We show that the spatial differentiation of the pathogen population can only be maintained at levels of coupling far lower than that necessary for the host populations to remain distinct. Therefore, identifiable community structure in host networks may not reflect differentiation of the processes occurring upon them and, conversely, a lack of genetic differentiation between pathogens from different host communities may not reflect strong mixing between them.
authors.affiliation: Department of Zoology, University of Oxford, South Parks Road, Oxford OX1 3PS, UK. caroline.buckee@zoo.ox.ac.uk
authors.forename: Caroline
authors.initials: C
authors.lastname: Buckee
authors.forename: Leon
authors.initials: L
authors.lastname: Danon
authors.forename: Sunetra
authors.initials: S
authors.lastname: Gupta
mesh_terms: D000941:Antigens / Q000235:genetics*; D003198:Computer Simulation; D003710:Demography; D017753:Ecosystem; D014644:Genetic Variation; D005828:Genetics, Population; D008954:Models, Biological
chemical_list: D000941:Antigens