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Journal of Bone and Joint Infection An open-access journal of the European Bone and Joint Infection Society and the MusculoSkeletal Infection Society
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Volume 1, issue 1
J. Bone Joint Infect., 1, 65–67, 2016
https://doi.org/10.7150/jbji.16124
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 4.0 License.
J. Bone Joint Infect., 1, 65–67, 2016
https://doi.org/10.7150/jbji.16124
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 4.0 License.

Brief report 01 Oct 2016

Brief report | 01 Oct 2016

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

Martijn Dietvorst1, Ramon Roerdink2, Alexander C.A.P. Leenders2, Menno A. Kiel3, and L. Paul A.2 Martijn Dietvorst et al.
  • 1Maastricht University, Maastricht, The Netherlands;
  • 2Jeroen Bosch general hospital, 's-Hertogenbosch, The Netherlands;
  • 3Erasmus Medical Centre, Rotterdam, The Netherlands.

Keywords: septic arthritis, knee, acute mono-arthritis, Parvimonas micra, pseudogout, CPPD.

Abstract. 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.

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