Abstract
Thirty Japanese badgers (Meles anakuma) were collected in Gunma Prefecture from 1999 to 2010, and their pancreases were examined. Of the total, 96.7% of the badgers were infected with Tetragomphius melis. Intensity of T. melis ranged from 3 to 266. Nodular and tubercular lesions were formed around the pancreatic duct. The size of tubercles ranged from 1.0 cm to 6.8 cm. In spite of the large tubercles or heavy infection of the nematodes, infected badgers were in good shape and showed no evidence of disorder in function.
