corynebacterium jeikeium corynebacterium jeikeium corynebacterium jeikeium is a rod-shaped, catalase-positive, aerobic species of actinomycetota in the genus corynebacterium. c. jeikeium is pathogenic, typically causing an opportunistic infection seen most frequently in bone marrow transplant patients. c. jeikeium is a strictly aerobic organism and forms tiny grayish white colonies when grown on blood agar. corynebacterium jeikeium scientific classification domain: bacteria phylum: actinomycetota class: actinomycetia order: mycobacteriales family: corynebacteriaceae genus: corynebacterium species: c. jeikeium binomial name corynebacterium jeikeiumjackman et al. 1988 synonyms group jk corynebacterium c. jeikeium is usually susceptible to vancomycin and tetracycline. resistance to macrolide antibiotics is often encountered. it can be acquired in hospitals. its genome has been sequenced.