Oxidative stress, Immunity, Smegmamorpha - parasitology, Smegmamorpha - genetics, Oxidative Stress - physiology, Acrolein - metabolism, Nematoda - pathogenicity, Major Histocompatibility Complex - genetics, Innate - physiology, Smegmamorpha - immunology, immunocompetence, coevolution, three-spined stickleback, major histocompatability complex, parasite resis...