Similarly, in the present study, dietary supplementation with Nano-EUG was found to be as effective as that with diclazuril at maintaining serum concentrations of TP, ALB, and GLB, as well as serum activities of the antioxidant enzymes SOD, GST, and GPx in the coccidiosis-challenged chickens within levels not different from those measured in chickens of the h-CON group. This evidence concerns the gene SOD1 and coccidiosis.