Abstract
A simplified plaque reduction neutralization test was performed to detectinfectious bursal disease antibody in chickens twice infected. Since 18 days after initialinfection, some correlation was observed between antibodies detected by the agar getprecipitin test, which is the conventional serodiagnosLic method, and the plaque reductionneutralization test. In plaque assay of the l/PV strain of infectious bursal disease virus, agar overlay was better than agarose and methocel overlay media in chicken fibroblastmonolayers.
