Figure 2.

Host-pathogen infection dynamics over time. Mean host mortality and mean outcrossing rates were measured over thirty generations of coevolution between C. elegans hosts and S. marcescens pathogens. Host mortality rates were measured on hosts sampled every ten generations. Each host population at each time point was infected with the ancestral pathogen, the contemporary pathogen, and a non-coevolving control pathogen, each corresponding to the particular host population being infected. Host outcrossing rates were estimated from male frequency data collected every four host generations (and at generation 30) throughout the experiment, and value of the mixed mating populations were previously reported in Morran et al. 2011. (A.) Mixed mating hosts. (B.) Obligately outcrossing hosts.