Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Nico Van Wiltenburg0
Bernarda Johanna Pitstra0
Frans Gerrit Davelaar0
Date of Patent
May 1, 2007
Patent Application Number
09355374
Date Filed
January 29, 1998
Patent Primary Examiner
Patent abstract
The present invention is concerned with isolated infectious bursitis (or bursal) disease virus(es) and a vaccine containing said virus(es) which is capable of protecting poultry against disease caused by infectious bursitis virus, characterized in that the vaccine virus(es) has/have the combined properties of, upon administration to a chicken, causing a reduction in the bursal size, expressed as bursa/body weight ratio, of less than 55%, and the capability to protect poultry having an ELISA antibody titer of at least about 500.
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