Kayla C. King, Stuart K. J. R. Auld, Philip J. Wilson, Janna James and Tom J. Little The bacterial parasite Pasteuria ramosa is not killed if it fails to infect: implications for coevolution Ecology and Evolution 3
In coevolutionary interactions, selection on parasites will be strong if parasites are destroyed and diluted from the environment by resistant individuals. We show that a bacterial parasite of Daphnia remains viable after passage through some host genotypes, even after several weeks in an extreme environment. Parasite survival through host guts may reduce selection for successful infection in the first instance and may also weaken reciprocal selection on hosts.
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