NCIt definition : A species of aerobic or facultatively anaerobic, Gram-positive, coryneform, pleomorphic
bacilli assigned to the phylum Actinobacteria. This species is nonmotile, non-spore
forming, catalase positive, oxidase negative, does not reduce nitrate, hydrolyzes
gelatin and hippurate but not urease or esculin and is not acid fast. C. ulcerans
is commensal to the animal and human nasopharynx, but toxin producing strains can
cause diphtherial-like illness.;
Alternative definition : CDISC: Any bacterial organism that can be assigned to the species Corynebacterium
ulcerans.;