counteraction

noun

1. An act of retaliation; a counterattack.
2. Any action in opposition to a previous action.

   “On the other hand, it can be observed that, with small exceptions, the S. pneumonia strains are the only Streptococci equipped with homospermidine biosynthesis and pyruvate oxidation pathways, which have been found to be involved in pathogenicity mechanisms [50 ] and in the counteraction of oxidative stress [51 ].”