Figure 1. Schematic representation of experimental design.

( A) Daphnia were put into a water tank and allowed to acclimate (start population). Then, two experimental tanks were set up following strictly the same design. The only difference was the presence of a predator (a guppy trained to eat daphnia) in the floating plastic fish breeding isolation box in the stress treatment. (B) S.mansoni infected snails were used to produce cercariae that were separated into two populations, one treated with Latex in well water, the other without treatment. After one hour cercaria were used to infect mice. Adult worms were recovered at 65 days post-infection by perfusion and used for ATAC-seq.