Measures of host fitness in different treatments according to infection status.

<p>A: production of host offspring (fecundity) over 25 days; B: survival of hosts; and C: instantaneous rate of population growth of hosts (<i>r</i>), a composite measure of host fitness. Error bars denote one standard error. In panel B, “<i>Metsch</i>-exposed” indicates animals who were exposed to <i>Metschnikowia,</i> but who did not become infected. In all three panels, data were pooled across host genotypes and parasite isolates. Numbers of replicates are shown above bars; for <i>r,</i> the means of data for each host genotype from each infection category were used, resulting in lower sample sizes.