Cardiobacterium

{{Short description|Genus of bacteria}}

{{Taxobox

| image = Cardiobacterium hominis.jpg

| image_caption = Cardiobacterium hominis on blood agar plate

| domain = Bacteria

| phylum = Pseudomonadota

| classis = Gammaproteobacteria

| ordo = Cardiobacteriales

| familia = Cardiobacteriaceae

| genus = Cardiobacterium

| genus_authority = Slotnick & Dougherty, 1964

| type_species = Cardiobacterium hominis

| type_species_authority = Slotnick & Dougherty, 1964

| subdivision_ranks = Species

| subdivision = {{Linked species list

|Cardiobacterium hominis|Slotnick & Dougherty, 1964

|Cardiobacterium valvarum|Han et al. 2004}}

| subdivision_ref = {{lpsn|genus/cardiobacterium|Genus: Cardiobacterium}}

}}

Cardiobacterium is a genus of bacteria in the family Cardiobacteriaceae. These Gram-negative bacillus (rod-shaped) bacteria are commonly grouped with other bacteria into the HACEK group.{{citation needed|date=June 2025}}