抄録
In Fukuoka Prefecture inclusion body hepatitis (IBH) broke out exclusively among chicks originated from Hatchery R. It became under control when no chicks were introduced from this hatchery. Then it broke out among chicks derived from a flock of breeding hens in Area S of Saga Prefecture. These hens presented no changes in the rate of laying, fertilized eggs, or hatchability of eggs, as compared with others of the same breed. They were positive for adenovirus antibody (AA) and negative for antibody against the virus of disease of the bursa of Fabricius (AF). The chicks originated from them were positive for AA and AF in flocks involved in the outbreak, and positive or negative for AA and negative for AF in flocks free from IBH.
It was clarified that chicks originated from breeding hens possessing no AF suffered from IBH when infected with the two viruses mentioned above.
