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Limulus assay for bacterial endotoxin in synovial fluid.
  1. T Cesario,
  2. M Jason,
  3. B S Andrews,
  4. E Shanbron,
  5. D Juranas,
  6. L Katz,
  7. G J Friou

    Abstract

    The limulus assay for the detection of bacterial endotoxin has been applied to the study of synovial fluid. Three of 5 patients (60%) with culture-positive gonococcal arthritis had positive SF limulus assay results; as did 2 of 11 (18%) with presumptive evidence of gonococcal arthritis, 3 of 6 (50%) with nongonococcal infectious arthritis, and none of 47 patients with noninfectious arthritis. Endotoxin levels ranged from 0.25 to 128.0 ng/ml. As at present applied to synovial fluid the commercial limulus assay appears to be specific for the infectious process but apparently lacks sensitivity.

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