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Hematoxylin- and eosin-stained, paraffin-fixed sections of the upper colon of (A) uninfected hamsters, (B) 630-infected hamsters, and (C) B1-infected hamsters. In contrast to the results for the uninfected tissue, increasing numbers of polymorphs are present basally and at the surface of the mucosal of tissue infected with C. difficile 630, and the highest numbers are in tissue infected with C. difficile B1.
