Evaluation of gross lesions. At 14, 21 and 28 dpi gross porcine proliferative enteropathy (PPE) lesions were evaluated and assigned the scores of either mild (score of 1), moderate (score of 2) or severe (score of 3). A Percent of animals with gross PPE lesions evaluated at necropsy. B Lesion score evaluated at necropsy. Different letters indicate statistical significance (p < 0.05), error bars represent the standard error.