Corynebacterium pseudodiphtheriticum septic arthritis secondary to intra-articular injection--a case report and literature review.

This is believed to be the first report of a case of septic arthritis, secondary to intra-articular injection, caused by Corynebacterium pseudodiphtheriticum - a skin commensal micro-organism. Review of the literature highlights the rarity of this pathogen in osteoarticular infections and a potential for delayed diagnosis and inadequate treatment due to subtle initial presentation.