NCIt related terms : CORYNEBACTERIUM DIPHTHERIAE TYPE GRAVIS;
NCIt definition : A biovar of Corynebacterium diphtheriae distinguished by its morphogenic and biochemical
properties. Biovar gravis is nitrate positive and positive for fermentation of glucose,
maltose, and starch. This biovar is one of the two main disease-causing biovars.;
Alternative definition : CDISC: Any bacterial organism that can be assigned to the species Corynebacterium
diphtheriae subspecies gravis.;