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Evaluation of blood stool and intestinal lesions after challenge of E. tenella. Blood stool from the chickens infected with 102, 103, 104, and 105 sporulated oocysts of E. tenella (A–D), uninfected negative control group (E). Intestinal lesions from the chickens infected with 102, 103, 104, and 105 sporulated oocysts of E. tenella (F–I), negative control group (J).
