Author's Organization:Exotic Disease Research Division, National Institute of Animal Health Second Research Division, National Institute of Animal Health Exotic Disease Research Division, National Institute of Animal Health Kyusyu Branch Laboratory, National Institute of Animal Health
Published: June 15, 1991Received: October 03, 1990Available on J-STAGE: February 15, 2008Accepted: March 02, 1991
Advance online publication: -
Revised: -