Author's Organization:Chiba Prefectural Institute of Animal Health Chiba Prefectural Institute of Animal Health Saku Livestock Hygiene Service Center National Veterinary Assay Laboratory National Veterinary Assay Laboratory National Veterinary Assay Laboratory Tokyo University of Agriculture Yakult Central Institute for Microbiological Research
Published: August 15, 1991Received: October 17, 1990Available on J-STAGE: February 15, 2008Accepted: May 07, 1991
Advance online publication: -
Revised: -