Author's Organization：Department of Veterinary Microbiology, Faculty of Agriculture, the University of Tokyo Department of Veterinary Microbiology, Faculty of Agriculture, the University of Tokyo Department of Veterinary Microbiology, Faculty of Agriculture, the University of Tokyo Department of Veterinary Microbiology, Faculty of Agriculture, the University of Tokyo
Published: December 15, 1989Received: June 30, 1989Available on J-STAGE: February 13, 2008Accepted: August 22, 1989
Advance online publication: -
Revised: -
