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Infective arthritis due to Blastocystis hominis.
  1. M G Lee,
  2. S C Rawlins,
  3. M Didier,
  4. K DeCeulaer
  1. Department of Medicine, University Hospital, Kingston, Jamaica.


    A patient with rheumatoid arthritis taking prednisone developed Blastocystis hominis acute diarrhoea, which was associated with increased inflammation and effusion of the left knee. B hominis organisms were found in synovial fluid from the left knee. The patient responded dramatically to metronidazole treatment. B hominis may become disseminated in immunosuppressed patients with diarrhoea and may cause infective arthritis.

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