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Medical Definition of Cardiobacterium
1. A genus of nonmotile, pleomorphic, gram negative, facultatively anaerobic, rod-shaped bacteria found in the nasal flora and associated with endocarditis in humans. The type species is cardiobacterium hominis. Cardiobacterium hominis, a species that causes endocarditis in humans. The type species of Cardiobacterium. See: HACEK group. (05 Mar 2000)