Photomicrographs of duodenal biopsies of foals collected on day 3 after birth (scale bar ¼ 100 mm) (A) hematoxylin and eosin staining (10); (B) hematoxylin
and eosin staining (40), vacuolization of enterocytes especially at the tips of the villi, goblet cells are marked by black arrows; (C) Ki-67 immunostaining
(10); (D) Ki-67 immunostaining (40).
A