- Gram-positive branching, beaded, filamentous rod.
- Partially acid fast with modified Kinyoun stain.
- Can be difficult to recover; notify lab if high index of suspicion.
- Grow on non-selective media in 2-14 days.
- Selective media (Thayer-Martin, paraffin agar, charcoal-buffered yeast extract media) may be needed to enhance growth and minimize contaminants.
- More than 50 species known. Found worldwide, considered a soil pathogen. May also be seen in human oral flora.
- Many of the isolates initially identified as N. asteroides are now known by modern techniques to have been misclassified.
- Classified by some according to drug-susceptibility patterns + other organisms/groups:
- Type I: N. abscessus
- Type II: N. brevicatena/paucivorans complex
- Type III: N. nova complex (including N. nova, N. veterana, N. africana)
- Type IV: N. transvalensis complex
- Type V: N. farcinica
- Most common cause of disseminated/extrapulmonary disease
- Type VI: N. cyriacigeorgica
- N. brasiliensis
- Cause of primary cutaneous infection in immunocompetent hosts
- N. pseudobrasiliensis
- N. otitidiscaviarum
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Last updated: July 30, 2017
Melia, Michael, and John G Bartlett. "Nocardia." Johns Hopkins ABX Guide, The Johns Hopkins University, 2017. Johns Hopkins Guides, www.hopkinsguides.com/hopkins/view/Johns_Hopkins_ABX_Guide/540389/3.3/Nocardia.
Melia M, Bartlett JG. Nocardia. Johns Hopkins ABX Guide. The Johns Hopkins University; 2017. https://www.hopkinsguides.com/hopkins/view/Johns_Hopkins_ABX_Guide/540389/3.3/Nocardia. Accessed June 3, 2023.
Melia, M., & Bartlett, J. G. (2017). Nocardia. In Johns Hopkins ABX Guide. The Johns Hopkins University. https://www.hopkinsguides.com/hopkins/view/Johns_Hopkins_ABX_Guide/540389/3.3/Nocardia
Melia M, Bartlett JG. Nocardia [Internet]. In: Johns Hopkins ABX Guide. The Johns Hopkins University; 2017. [cited 2023 June 03]. Available from: https://www.hopkinsguides.com/hopkins/view/Johns_Hopkins_ABX_Guide/540389/3.3/Nocardia.
* Article titles in AMA citation format should be in sentence-case
TY - ELEC T1 - Nocardia ID - 540389 A1 - Melia,Michael,M.D. AU - Bartlett,John,M.D. Y1 - 2017/07/30/ BT - Johns Hopkins ABX Guide UR - https://www.hopkinsguides.com/hopkins/view/Johns_Hopkins_ABX_Guide/540389/3.3/Nocardia PB - The Johns Hopkins University DB - Johns Hopkins Guides DP - Unbound Medicine ER -