Author's Organization:Department of Veterinary Pathology, Faculty of Agriculture, Yamaguchi University Department of Veterinary Pathology, Faculty of Agriculture, Yamaguchi University Poultry Disease Laboratory, National Institute of Animal Health
Published: June 15, 1992Received: November 12, 1991Available on J-STAGE: February 15, 2008Accepted: February 04, 1992
Advance online publication: -
Revised: -