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Fuller's earth (montmorillonite) pneumoconiosis.
  1. A R Gibbs,
  2. F D Pooley
  1. Department of Histopathology, Llandough Hospital, Penarth South Glamorgan.


    A fuller's earth worker developed signs of pneumoconiosis. Pathological examination of the lung tissues showed interstitial collections of dust laden macrophages associated with mild fibrosis. Mineralogical analysis showed a high content of montmorillonite. This study shows that a pneumoconiosis can result from prolonged heavy exposure to calcium montmorillonite (fuller's earth) in the absence of quartz. The disease is relatively mild and associated with little clinical disability.

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