Fig. 9

Co-regulation of the differentially expressed genes. K-means cluster analysis yielded eight clusters of co-regulated genes, as indicated by the numbers on the left. The top of the graph shows the different treatment conditions, including C. elegans strain, pathogen strain and exposure time point. Red refers to up-regulated genes, whereas blue to down-regulated genes, always upon pathogen exposure relative to the corresponding E. coli OP50 control. High color intensities indicate strong expression differences to the control (see legend in the bottom right corner). The complete results are given in Additional file 15