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Fecal scores of pigs challenged with F18+ E. coli. Fecal scores: 1: very hard and dry stool, 2: firm stool, 3: normal stool, 4: loose stool, and 5: watery stool with no shape. Adapted from Coddens et al. [65] (1011 CFU), Kim et al. [66] (3 × 1010 CFU), Duarte et al. [67] (6 × 109 CFU), Duarte and Kim [8] (4.6 × 109 CFU), Xu et al. [7] (2.4 × 1010 CFU), Duarte and Kim [16] (5.2 × 109 CFU), Jang et al. [68] (1.2 × 1010 CFU).
