/peuh lawr"euhm, -lohr"-/ , Vet. Pathol.
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.
[ 1925-30; Bacterium ) pullorum former name of the bacterium, L pullorum, gen. pl. of pullus cockerel, chicken (see PULLET) ]