Figure 2.

Effects of dietary essential oil supplementation and Eimeria challenge on serum antioxidants of broilers at different age (A: 18 d, B: 28 d, C: 42 d, U/mL for all except for MDA, n = 6). None: unchallenged broilers received aliquot of dilution at d 10. Challenge: challenged broilers received sporulated 10⁴ oocysts of E. tenella, E. acervulina, and E. maxima at d 10. Control: a corn and soybean meal basal diet, anticoccidial: control diet + 60 g nicarbazin and 60 g narasin per ton of feed, oregano: control diet + 500 ppm oregano oil, and clove: control diet + 500 ppm clove oil. Abbreviations: CAT, catalase; GSH-Px, glutathione peroxidase; MDA, malonaldehyde; T-SOD, total superoxide dismutase. ^{A, B}Capitalized subscripts noted the major effect of Eimeria challenge on fecal oocyst output.