| Organism | Infection Types | Known Organism Reservoir |
| C. diphtheriae | Diphtheria, nontoxigenic strains can cause endocarditis, sepsis, osteomyelitis, and other serious invasive diseases | Nasopharynx of healthy persons, transfers from skin lesions |
| C. accolens | Endocarditis | Eyes, ears, nose, nasopharynx |
| C. amycolatum | Postoperative infections, urinary tract infections, peritonitis, bloodstream infections | Skin, bovine milk |
| C. jeikeium | Endocarditis, shunt infections, osteomyelitis, lymphadenopathy | Skin, hospital surfaces |
| C. kroppenstedtii | Pulmonary disease, abscesses | Unknown |
| C. macginleyi | Eye and corneal infections | Humans |
| C. minutissimum | Erythrasma, wound infections, urinary tract infections | Skin |
| C. propinquum | Lower respiratory infections | Respiratory |
| C. pseudotuberculosis | Rare human infection lymphadenitis, pneumonia | Sheep, goats, horses, and occupational exposures |
| C. riegelii | Urinary tract infections primarily in females | Urogenital tract of females |
| C. striatum | Device associated infections, infection in chronic wounds, and conjunctiva | Skin and oropharynx |
| C. tuberculostearicum | Associated with Leprosy infections and mastitis | Skin and food |
| C. ulcerans | Can cause disease similar to diphtheria, necrotic granulomas, pulmonary nodules | Nasopharynx of healthy persons as well as horses and cows |
| C. urealyticum | Urinary tract infections (primarily alkali encrusted cystitis) | Skin primarily in hospitalized patients |
| C. xerosis | Surgical site infections, hospital-acquired pneumonia | Skin and oropharynx |
| Black colony Corynebacterium species | Urinary tract infections primarily in females | Urogenital tract of females |
