Morihiro Saito
Tutaka Shibata
Kumagaya Meat Inspection Center Saitama Prefecture, 179-1 Shimomatsuda, Saitama 360, Japan.

Hiroshi Itagaki
Department of Parasitology, Azabu Unversity School of Veterinary Medicine, 1-7-71, Fuchinobe, Sagamihara, Kanagawa 229, Japan.