FIG. 5.
Histology of the extrahepatic biliary tract. Longitudinal sections of the extrahepatic biliary ducts were harvested at day 7 following injection. The sections were stained with Masson's trichrome to best delineate the histologic changes that took place following infection. Biliary epithelial cells stained pink. Inflammatory cells stained blue. The black arrows indicate sites of severe biliary epithelial cell injury duct. The black arrowheads indicate periductal inflammatory infiltrate. In mice injected with RRV or SA-11FM, the inflammatory cells extend into the lumen of the bile.