On the evolutionary coexistence of parasite strains.

Abstract excerpt

Classical models of parasite competition show that coexistence is impossible if different strains give complete cross-immunity. However, parasite coexistence is possible if some of the model assumptions are changed. For instance, coexistence is impossible if density-dependence operates only in hosts' fertility, but surprisingly becomes possible if hosts' mortality is density-dependent. Parasite strains can also...

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