Fig. 2. Body weights and intestinal lesions in chickens during experimental NE. Cobb,Hubbard, and Ross chickens were fed an unsupplemented diet and uninfected (Cont),an unsupplemented diet and co-infected with E.maxima and C. perfringens (NE), or an oleoresin-supplemented diet and co-infected with E. maxima and C. perfringens (NE + XT).Body weights (A) and intestinal lesion scores (B) were measured at day 20. Each bar represents the mean ± SEM value (n = 15). Bars not sharing the same letter within each chicken breed are significantly different according to the Duncan's multiple range test (P < 0.05).