Maintenance of diversity in a parasite population capable of persistence and reinfection
نویسندگان
چکیده
Motivated by observations in DNA data of the human cytomegalovirus, we study the dynamics and the maintenance of diversity in a hierarchical model of a two-type parasite population distributed over its (infected) hosts. The parasite is assumed to be capable to persist in its host and to reinfect other hosts, and balancing selection is assumed to maintain diversity within hosts. For a suitable parameter regime in which parasite reproduction is faster than reinfection and reinfection is faster than host replacement, we show that in the limit of large host and parasite populations the system is driven by a dynamical system with a globally stable equilibrium, guaranteeing that both types are maintained in the parasite population for a long time on the host time scale.
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