RNAi induced morphologic changes in ovaries of female S. mansoni. CLSM analysis of S. mansoni females and males treated for 15 days with different combinations of dsRNA (as indicated): (A, E, I, and M) Smgpcr20 and Smnpp26 dsRNA; (B, F, J, and N) Smgpcr20 and Smnpp40 dsRNA; (C, G, K, and O) a combination of the three gene-specific dsRNAs; (D, H, L, and P) control worms maintained under the same culture conditions but without dsRNA (n = 5 per experiment). O, ovary; imo, immature oocytes; mo, mature oocytes; sv, sperm vesicle; t, testes; vit, vitellarium; white stars indicate the ootype of females. Scale bars: 50 µm.