Rhodococcus equi is a topic covered in the Johns Hopkins HIV Guide.

To view the entire topic, please or purchase a subscription.

Official website of the Johns Hopkins Antibiotic (ABX), HIV, Diabetes, and Psychiatry Guides, powered by Unbound Medicine. Johns Hopkins Guide App for iOS, iPhone, iPad, and Android included. Explore these free sample topics:

Johns Hopkins Guides

-- The first section of this topic is shown below --


  • Pleomorphic gram-positive coryneform (’little rod’ from Greek koryne = club) aerobic bacteria. Non-spore-forming, non-motile, non-fermenting weakly acid-fast on Ziehl-Neelsen smear. Appears coccoid in solid media and pleomorphic in liquid media.
    • May be mistaken as ’diphtheroid’ contaminant or a Mycobacterium.
  • Grows well on ordinary media, named ’rhodo’ (red) for salmon-colored. Mucoid coalescing colonies seen after 4 days growth on solid media.
  • Soil inhabitant; infection via inhalation, inoculation or ingestion
    • Recognized equine pathogen, foals serve as reservoir and develop pyogranulomatous pneumonia.
  • R. equi persists and multiplies inside macrophages.

-- To view the remaining sections of this topic, please or purchase a subscription --

Last updated: October 3, 2015