Author's Organization:Department of Hygiene and Microbiology, Faculty of Veterinary Medicine, Hokkaido University Department of Hygiene and Microbiology, Faculty of Veterinary Medicine, Hokkaido University Department of Hygiene and Microbiology, Faculty of Veterinary Medicine, Hokkaido University National Institute of Animal Health
Published: December 05, 1983Received: May 02, 1983Available on J-STAGE: February 13, 2008Accepted: August 09, 1983
Advance online publication: -
Revised: -