Author's Organization：Department of Veterinary Microbiology, Obihiro University of Agriculture and Veterinary Medicine Department of Veterinary Microbiology, Obihiro University of Agriculture and Veterinary Medicine Department of Veterinary Microbiology, Obihiro University of Agriculture and Veterinary Medicine Department of Veterinary Microbiology, Obihiro University of Agriculture and Veterinary Medicine
Published: December 15, 1990Received: April 17, 1990Available on J-STAGE: February 14, 2008Accepted: August 08, 1990
Advance online publication: -
Revised: -
