Figure 1.

Immunohistochemical identification of eosinophils in different segments of the gastrointestinal tract of mice. Eosinophils are found in the lamina propria of the stomach (a), duodenum (b), jejunum (c), ileum (d), colon (e), and cecum (f). In the small intestine (b–d), eosinophils are predominantly located in the crypt region. In the duodenum (b), eosinophils are also seen throughout the length of the villus. Eosinophils were not routinely seen in the mucosal or serosal layers. These representative photomicrographs were taken from 129 SvEv mice. Each section is immunostained with anti-MBP antiserum and processed by nickel/cobalt enhancement of peroxidase activity. Eosinophils are indicated by arrows. ×125.