Society for Techno-innovation of Agriculture, Forestry and Fisheries (STAFF) Institute, 446-1 Ippaizuka, Tsukuba, Ibaraki 305-0854, Japan
P. MAJIWA
International Livestock Research Institute, P. O. Box 30709, Nairobi, Kenya
H. HIRUMI
The Research Center for Protozoan Molecular Immunology, Obihiro University of Agriculture and Veterinary Medicine, Inadacho, Obihiro, Hokkaido 080-8555, Japan
