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Histopathological examination of intestinal segments of infant rabbits infected with STEC O157:H7 strain 89020087 on day 7 after infection. Hematoxylin-and-eosin staining of the small intestine (A, D), cecum (B, E), and colon (C, F) from a control rabbit (A to C) and an L. casei-treated rabbit (D to F). (CI) Immunostaining of STEC O157 in a colon section from a control rabbit. Magnifications in both groups: small intestine ×260; cecum, ×390; colon, ×520. For details, see the text.
