Journal of Bone and Joint Infection (Oct 2016)

Acute Mono-Arthritis of the Knee: A Case Report of Infection with <em>Parvimonas Micra</em> and Concomitant Pseudogout

  • M. Dietvorst,
  • R. Roerdink,
  • A. C.A.P. Leenders,
  • M. A. Kiel,
  • L. P. A.

DOI
https://doi.org/10.7150/jbji.16124
Journal volume & issue
Vol. 1
pp. 65 – 67

Abstract

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Parvimonas micra is a rare pathogen for septic arthritis and is known for its subacute onset. We report a case of acute arthritis of the knee caused by P. micra and pseudogout. Initially, calcium pyrophosphate crystals were found in the knee, which were successfully treated with a steroid injection. Only anaerobic cultures became positive. A 16S rRNA PCR-analysis was necessary to identify P. micra as causative agent, a method which is never described before in similar cases. The infection was treated with clindamycin for 6 weeks. This is the third case report of a septic arthritis caused by P. micra and the second which also reports concomitant pseudogout.