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PNEUMOCONIOSIS. Lung diseases resulting from the inhalation of dust. SILICOSIS. A lung disease seen in industry in which individuals are exposed to quartz/rock dust. An old disease even found in mummies.

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pneumoconiosis

PNEUMOCONIOSIS

Lung diseases resulting from the inhalation of dust

silicosis
SILICOSIS
  • A lung disease seen in industry in which individuals are exposed to quartz/rock dust.
  • An old disease even found in mummies.
  • Primarily seen in individuals who work in rock quarries, slate quarries, and other industries where quartz dust is present in respirable size.
silicosis is caused by
SILICOSIS IS CAUSED BY:
  • The inhalation of free silica (silica dioxide) crystals.
  • Blood cells attack and digest the silica dioxide which in turn develops silicic acid.
  • The acid in turn kills the blood cells which also release chemicals which damages the lungs and leads to fibrosis.
fibrosis
FIBROSIS
  • Damaged lung tissue with eventual formation of fibers.
  • Usually named after the associated dust type:
  • Crystalline silica - Silicosis
  • Asbestos - Asbestosis
  • Coal - Coal miners pneumoconiosis
characteristics
CHARACTERISTICS
  • Shortness of breath following physical exertion.
  • Severe cough
  • Fatigue
  • Loss of appetite
  • Chest pains
  • Fever
smoking and silicosis
SMOKING AND SILICOSIS
  • Smoking cigarettes complicates all the pneumoconiosis diseases.
  • Smokers who work around asbestos have a higher risk of lung cancer.
  • Symptoms of silicosis are very similar to lung cancer and emphysema.
important change
IMPORTANT CHANGE
  • On October 22, 1996 the International Agency for Research on Cancer (IARC) reclassified crystalline silica as a Class 1 carcinogen or considered to be a human carcinogen.
  • Formerly a Class 2 carcinogen or probable human carcinogen.
normal body defenses
NORMAL BODY DEFENSES
  • Mucous and hair in respiratory lining catch many particles of dust.
  • Smoking complicates this.
  • Coughing expels dust particles.
  • The smaller particles go deepest into the lungs.
precautions
PRECAUTIONS
  • Engineering Controls:
  • Water baths
  • Ventilation
  • Enclosed cabs
  • Industrial Hygiene Monitoring
  • Wearing of PPE