NCIt definition : A species of anaerobic, Gram negative, rod shaped bacteria assigned to the phylum
Proteobacteria. This bacteria is nonmotile, catalase and oxidase positive, ferments
sugars and is non hemolytic. A. lignieresii is part of the normal flora of the mucosa
of the upper gastrointestinal tract and may cause tumorous abscesses in the tongue
of cattle, sheep, horses, pigs and dogs.;
Alternative definition : CDISC: Any bacterial organism that can be assigned to the species Actinobacillus ligniersii.;