🦠microbiology review

Cardiobacterium hominis

Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025

Definition

Cardiobacterium hominis is a Gram-negative, facultatively anaerobic bacterium that is part of the HACEK group of organisms. It is known to cause endocarditis, an infection of the heart valves.

5 Must Know Facts For Your Next Test

  1. Cardiobacterium hominis primarily causes endocarditis, especially in individuals with underlying heart conditions.
  2. It is a slow-growing organism and can be difficult to culture in standard laboratory settings.
  3. Part of the HACEK group, which are a common cause of culture-negative endocarditis.
  4. Typically colonizes the upper respiratory tract but can enter the bloodstream through dental procedures or other mucosal disruptions.
  5. Treatment often involves prolonged antibiotic therapy, commonly using beta-lactams or aminoglycosides.

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