Diseases diagnosed in replacement layer and breeder chicken flocks in Victoria, Australia, 1977 to 1985.

During the period from July 1977 to June 1985, specimens from 766 replacement layer and breeder chicken flocks were submitted to the Veterinary Research Institute, Victoria, Australia, for investigation of morbidity, mortality and, or, poor performance. A total of 5940 necropsies, as well as numerous ancillary tests, were performed. The findings for these flocks are presented and the consequences of some particular diseases noted.