Rhodococcus equi
Rhodococcus equi is a topic covered in the Johns Hopkins ABX Guide.
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MICROBIOLOGY
- Formerly Corynebacterium equi. Ubiquitous in environment.
- Pleomorphic, non-motile Gram-positive coccobacillus.
- Variable acid-fast staining.
- Organism varies from coccoid to bacillary form depending on growth condition.
- Solid media: coccoid, salmon-pink color may not appear until 4-7 days after incubation.
- Liquid media: bacillary, branching.
- Modes of acquisition: inhalation, local inoculation, or ingestion.
- Can be overlooked as contaminant diphtheroids and be discarded.
- Lab should be aware if clinically suspected.
- Can also be confused with Micrococcus, Bacillus or Mycobacteria species.
- May cause necrotizing granulomata.
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Last updated: September 25, 2016
Citation
Fabre, Valeria. "Rhodococcus Equi." Johns Hopkins ABX Guide, The Johns Hopkins University, 2016. Johns Hopkins Guide, www.hopkinsguides.com/hopkins/view/Johns_Hopkins_ABX_Guide/540477/all/Rhodococcus_equi.
Fabre V. Rhodococcus equi. Johns Hopkins ABX Guide. The Johns Hopkins University; 2016. https://www.hopkinsguides.com/hopkins/view/Johns_Hopkins_ABX_Guide/540477/all/Rhodococcus_equi. Accessed September 20, 2019.
Fabre, V. (2016). Rhodococcus equi. In Johns Hopkins ABX Guide. Available from https://www.hopkinsguides.com/hopkins/view/Johns_Hopkins_ABX_Guide/540477/all/Rhodococcus_equi
Fabre V. Rhodococcus Equi [Internet]. In: Johns Hopkins ABX Guide. The Johns Hopkins University; 2016. [cited 2019 September 20]. Available from: https://www.hopkinsguides.com/hopkins/view/Johns_Hopkins_ABX_Guide/540477/all/Rhodococcus_equi.
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