NCIt definition : A gram negative, rod shaped, non-motile serotype of the bacteria genus Salmonella,
species Salmonella enterica, subspecies enterica. Salmonella Pullorum, one of two
poultry-adapted strains of Salmonella bacteria, causes Pullorum disease almost exclusively
in young chickens.;
Alternative definition : CDISC: Any bacterial organism that can be assigned to the species Salmonella enterica
subspecies enterica serovariant pullorum.;