Author's Organization：Department of Veterinary Microbiology, Faculty of Agriculture, University of Tokyo Department of Veterinary Microbiology, Faculty of Agriculture, University of Tokyo Department of Veterinary Microbiology, Faculty of Agriculture, University of Tokyo
Published: October 25, 1982Received: November 09, 1981Available on J-STAGE: February 13, 2008Accepted: May 21, 1982
Advance online publication: -
Revised: -
