Fig. 1

PCA with filtered data set (batch effects removed by RUVr method from the RUVSeq R package). Data sets clearly cluster in respective groups and are markedly separated in larval age groups (3 dpi vs. 6 dpi), while a strong pronounced separation of infected and control samples without an overlap was only observed for 6 dpi. Numbers refer to replicate of group. For more details see Table S 1 (Additional file 3) and Fig. S 8 (Additional file 1) where colors correspond to the same groups, respectively. M.p. – M. plutonius, P.a. – P. alvei