An infectious disease of chicks and other young birds caused by the bacterium Salmonella pullorum, which is carried in the ovaries of adult hens and appears in the eggs; in incubator-hatched birds, the disease usually involves the lungs and air sacs, but often spreads in flocks of young birds as an alimentary tract infection manifested by severe di... Found on http://www.encyclo.co.uk/local/20973
a highly contagious, frequently fatal disease of young poultry caused by the bacterium Salmonella gallinarum (pullorum), transmitted by the infected hen during egg production, and characterized by weakness, loss of appetite, and diarrhea. Found on https://www.infoplease.com/dictionary/pullorum-disease