Parametric survival analysis of the effect of fungal priming in ants.

The ants were initially exposed to control buffer, low dose of B. bassiana strain S2 or low dose of B. bassiana strain S3 (factor: “priming") and subsequently challenged with high dose of either B. bassiana strain S2 or strain S3 (factor: “challenge"). The summary table of the model gives information on the effect of each combination of initial exposure (C = control, S2 = strain 2 or S3 = strain 3) and subsequent fungal challenge (S2 = strain 2 or S3 = strain 3). For example, the comparison “C-S2 vs S2-S2" examines whether the ants that were initially exposed to control buffer or to a low dose of strain S2 differed significantly in their survival when challenged with a high dose of strain S2.