Isao Shimabukuro
Hideo Hasegawa*
Jun Kobayashi
Yoshiya Sato
Department of Parasitology and *Research Center of Comprehensive Medicine, Faculty of Medicine, University of the Ryukyu, Nishihara, Okinawa 903-01, Japan.

Bouasy Hongvanthong
Institute of Malariology, Parasitology and Entomology, Vientiane, Lao People's Democratic Republic.