| Cardiobacterium | |
|---|---|
|   | |
| Cardiobacterium hominis on blood agar plate | |
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| Genus: | Cardiobacterium Slotnick & Dougherty, 1964  | 
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Cardiobacterium is a Gram-negative bacillus (rod-shaped) bacterium commonly grouped with other bacteria into the HACEK group. Species of Cardiobacterium include Cardiobacterium hominis and Cardiobacterium valvarum .