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J Bone Jt Infect. 2016 Oct 1;1:65-67. doi: 10.7150/jbji.16124. eCollection 2016.

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

Author information

1
Maastricht University, Maastricht, The Netherlands.
2
Jeroen Bosch general hospital, 's-Hertogenbosch, The Netherlands.
3
Erasmus Medical Centre, Rotterdam, The Netherlands.

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.

KEYWORDS:

CPPD.; Parvimonas micra; acute mono-arthritis; knee; pseudogout; septic arthritis

Conflict of interest statement

Competing Interests: The authors do not have any conflict of interest.

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