The first host record of trichinosis in a red fox, Vulpes vulpes japonica,from Aomori prefecture, Northern Honshu, Japan

A case of wildlife trichinosis was found in a red fox (Vulpes vulpes japoni ca) captured at Rokkasho, Aomori Prefecture on November 27, 1998. Trichinel la larvae were obtained from almost all of the muscle tissues except for th e masseter. The highest number of larvae per gram of tissue was found in th e muscles of the gluteal region and throat. The lowest number was found in the diaphragm and tongue. Trichina cysts within the muscle fibers had group s of fatty cells at the poles, and minimal tissue reaction was observed a-r ound the cyst. No calcification was found in the cyst. These morphological findings suggested that the considerable time had elapsed since the invasio n. This is the first case of trichinosis in a red fox in Japan.