Abstract
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.
MeSH terms
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Adult
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Arthritis, Infectious / complications*
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Arthritis, Infectious / drug therapy
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Arthritis, Infectious / parasitology
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Arthritis, Rheumatoid / complications*
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Female
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Humans
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Intestinal Diseases, Parasitic / complications*
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Intestinal Diseases, Parasitic / drug therapy
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Knee Joint / parasitology
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Metronidazole / therapeutic use
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Protozoan Infections / complications*
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Protozoan Infections / drug therapy
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Protozoan Infections / parasitology
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Synovial Fluid / parasitology