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Rhodococcus erythropolis septic arthritis
  1. Leah M Grant1,
  2. Maria T Seville1,
  3. Erin H Graf2 and
  4. Holenarasipur R Vikram1
  1. 1Division of Infectious Diseases, Mayo Clinic, Phoenix, Arizona, USA
  2. 2Department of Laboratory Medicine and Pathology, Mayo Clinic, Phoenix, Arizona, USA
  1. Correspondence to Dr Holenarasipur R Vikram;{at}


A woman in her 50s presented with a 4-day history of left knee pain, erythema, swelling as well as malaise and rigours 1 month after undergoing a left knee meniscectomy. She was diagnosed with left native knee septic arthritis and underwent arthroscopic irrigation and debridement of the knee; cultures from synovial tissue grew Rhodococcus erythropolis. Rhodococcus spp are soil-dwelling and livestock-dwelling bacteria which occasionally cause disease in immunocompromised hosts. Infection in immunocompetent hosts is rare, and septic arthritis secondary to Rhodococcus erythropolis has not been reported previously.

  • Bone and joint infections
  • Orthopaedics

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  • Contributors Drafting the article: LG. Critical revision of the article: LG, EG, TS and HV. Final approval of the version to be published: LG, EG, TS and HV.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

  • Case reports provide a valuable learning resource for the scientific community and can indicate areas of interest for future research. They should not be used in isolation to guide treatment choices or public health policy.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.