FIG. 3.
Nasal tissue from a noninoculated CBA/N mouse (A) and from mice inoculated i.n. 6 days previously with 2.4 × 106 CFU of EF3030 (B to E). All fields were examined microscopically at a magnification of ×400 after staining with hematoxylin and eosin. (B) Acute inflammation of the mucosa with loss of cilia (arrow); (C) acute inflammation of mucosa and submucosa with the cilia preserved (arrow); (D) neutrophils filling a crypt in the mucosal surface; (E) scattered inflammatory cells (arrows) in the inflamed mucosa of a colonized mouse.