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DOI: 10.1191/0961203303lu328cr © 2003 SAGE Publications Chronic monoarthritis of the knee in systemic lupus erythematosusDepartment of Rheumatology, Allergy and Immunology, Tan Tock Seng Hospital, Singapore
Department of Rheumatology, Allergy and Immunology, Tan Tock Seng Hospital, Singapore, kok_ooi_kong{at}ttsh.com.sg
Clinical Microbiology Laboratory, KK Womens and Childrens Hospital, Singapore
Department of Pathology and Laboratory Medicine, Tan Tock Seng Hospital, Singapore We describe a middle-aged lady with systemic lupus erythematosus who presented with chronic left knee monoarthritis without constitutional symptoms. The histology of synovial tissue taken at arthroscopy showed acute inflammation and Erysipelothrix rhusiopathiae, identified with some difficulty, was isolated from the enrichment broth only. Blood cultures were negative. Her history revealed significant exposure to pond fish. She responded well to intravenous penicillin and remains well 12 months later.
Key Words: erysipelothrix infectious arthritis systemic lupus erythematosus
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