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Updated: Jul 14, 2025

In vivo Macrophage Imaging Using MR Targeted Contrast Agent for Longitudinal Evaluation of Septic Arthritis
Published on: October 20, 2013
Rhodococcus erythropolis septic arthritis
Leah M Grant1, Maria T Seville1, Erin H Graf2
1Division of Infectious Diseases, Mayo Clinic, Phoenix, Arizona, USA.
Abstract:
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.
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