Dose relationships for ants in Experiment 1 treated with serial doses of M. anisopliae var. anisopliae isolate KVL 02–56 or a control solution of 0.05% Triton-X. (a) Mortality at end of experiment (y = -0.021x3 + 0.144x2 - 0.054x + 0.171, r2 = 0.986). (b) Proportion of dead ants sporulating (y = 0.113x + 0.269, r2 = 0.700). (c) Mean number of spores (± SE) produced per sporulating ant (y = 0.3692x + 0.6692, r2 = 0.4081). (d) k-values for ants in Experiment 1 treated with serial doses of M. anisopliae var. anisopliae isolate KVL 02–56 (y = 0.809x + 0.468, r2 = 0.976). The dashed line has a slope of 1 and is included for comparison. (e) Per capita fitness (dashed line) and probability of infection (solid line; calculated by multiplying the probability of death and of sporulation if death occurs). (f) Per capita fitness after adjusting for the probability of infection.