A heatmap of fold changes calculated by comparing gene expression at post-infection time points to day 0 (pre-infection) for the 13 targets selected for RT-qPCR analysis. Calculating fold changes in this way provides confirmation of the direction (up or down) of expression changes. Fold change is presented on a log2 scale as indicated at the bottom of the heatmap, where red shading indicates upregulation and blue shading represents downregulation of gene expression. The genes were clustered based on their expression profiles as described in the legend for Figure 2. The abbreviations for the annotation columns are defined as for Figure 2.