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The photomicrograph of small intestinal segments from piglets at 21 days of age. Intestinal morphology in duodenum, jejunum and ileum of piglets as affected by dietary AGP and MOA supplementation. Picutures were observed at 100 × magnification. Control (Ctrl): a corn soybean meal-based diet. AGP: Ctrl + 75 mg/kg chlortetracycline. MOA: Ctrl + 1500 mg/kg MOA. n = 4
