Background
- A genetically unrelated group of Gram-positive bacilli
- Filamentous soil bacteria
- More commonly seen in fungal cultures
- Typically not acid-fast
Organisms
- Partially acid-fast (cell wall contains mycolic acid)
- Nocardia species
- Rhodococcus species: red colonies, associated with horses
- Gordonia species
- Tsukamurella species
- Corynebacterium species
- Not partially acid-fast (cell wall does not contain mycolic acid)
