In July 1979, the health of 86 current and ex-workers at 2 silica mining and milling
operations in southern Illinois was examined using a respiratory questionnaire, spirometry …

At the request of the Mine Safety and Health Administration (MSHA), the National Institute for
Occupational Safety and Health (NIOSH) recently investigated the health of workers at two …

An environmental and medical survey was undertaken in the slate‐pencil industry in the
central part of India. The industrial hygiene survey revealed that concentrations of free silica …

There are few longitudinal studies that investigated the radiological progression of silicosis
among different occupational groups. Inhalation exposure to very high levels of crystalline …

An increase in incidence of silicosis has been noticed among sandblasters and associated
workers in Louisiana since 1950. The duration of exposure to silica dust before death …

The effects of silicosis, the chronic fibrosing disease of the lungs produced by prolonged and
extensive exposure to free crystalline silica, have been recognized for centuries. Pulmonary …

Findings of the follow‐up examination of slate‐pencil workers after 16 months are described.
The progression of silicosis with this short duration was very rapid with high mortality among …

An industrial hygiene and medical survey was conducted in an iron foundry to study the
occurrence of silicosis. Breathing zone exposures to respirable crystalline silica had been …

Methods For this study we have defined silicosis as a radiologic abnormality consisting of
regular nodular opacification of the lung in a subject with a history of exposure to. silica …

We describe silicosis in a patient with chronic obstructive pulmonary disease who worked as
a maintenance mechanic for less than 5 years in a plant in South Carolina that manufactures …