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Mountain desert silicosis.

R K Patial1

  • 1IG Medical College, Shimla, HP.

The Journal of the Association of Physicians of India
|April 25, 2000
PubMed
Summary
This summary is machine-generated.

Silicosis was diagnosed in Himalayan highlanders with miliary shadows, even without occupational exposure. Environmental silica exposure in their high-altitude desert region is implicated in this high-incidence respiratory disease.

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Area of Science:

  • Pulmonary Medicine
  • Environmental Health
  • Radiology

Background:

  • Miliary shadows on chest X-rays in high-altitude populations can indicate various lung conditions.
  • Silicosis is a serious occupational lung disease caused by silica dust inhalation.

Purpose of the Study:

  • To investigate the prevalence and causes of silicosis in highlanders of the Himalayan desert presenting with radiological miliary shadows.
  • To determine if occupational exposure is the sole source of silica exposure in this population.

Main Methods:

  • Seventeen highlanders with miliary shadows were evaluated at a Himalayan medical camp.
  • Diagnostic workup included detailed occupational and environmental history, hemogram, chest skiagrams, pulmonary function tests, and soil silica analysis.

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Main Results:

  • Silicosis was confirmed in all 17 participants (chronic simple variety).
  • No silicosis-prone industries were identified in their locality, and only three had relevant work history.
  • High silica content (36.8%) was found in the local soil, suggesting environmental exposure.

Conclusions:

  • Highlanders in the Himalayan desert can develop silicosis without direct occupational exposure.
  • Environmental exposure to silica-rich soil is a significant factor contributing to silicosis in this high-altitude population.