Radiographic changes in a group of chrysotile miners and millers exposed to low asbestos dust concentrations.
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منابع مشابه
Radiographic changes in a group of chrysotile miners and millers exposed to low asbestos dust concentrations.
Radiographic changes in 342 Quebec asbestos miners exposed to low levels of asbestos dust for an average period of 20 years were studied. Their estimated cumulative exposure ranged from 7 fibres per cubic centimeter X years (f-y/cc) to 300 f-y/cc. Of these workers, 2.1% showed a small opacity score of 1/0 or more and 2.7% showed pleural changes. No linear relationship could be established betwe...
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has been known for 50 years that inhalation of asbestos dust can lead to appearances on chest roentgenograms that are different from those associated with silicosis and coal workers’ pneumoconiosis.1 However, only the latest international classifications of the radiographic appearances of the pneumoconioses allow the recording of such shadows.2’3 These include what are now called small irregula...
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Miners and millers of talc ore, free from asbestos and silica, were examined for respiratory effects. A study of 116 subjects included the modified British Medical Research Council respiratory symptom questionnaire, simple spirometry, chest radiography, and limited examination of the chest. A one-year follow-up evaluation was performed on 103 subjects. Of the 12 subjects whose chest radiographs...
متن کاملMesothelioma in Quebec chrysotile miners and millers: epidemiology and aetiology.
In a cohort of some 11,000 men born 1891-1920 and employed in the Quebec chrysotile production industry, including a small asbestos products factory, of 9780 men who survived into 1936, 8009 are known to have died before 1993, 38 probably from mesothelioma--33 in miners and millers and five in factory workers. Among the 5041 miners and millers at Thetford Mines, there had been 4125 deaths from ...
متن کاملCancer Mortality in Chinese Chrysotile Asbestos Miners: Exposure-Response Relationships
OBJECTIVE This study was conducted to assess the relationship of mortality from lung cancer and other selected causes to asbestos exposure levels. METHODS A cohort of 1539 male workers from a chrysotile mine in China was followed for 26 years. Data on vital status, occupation and smoking were collected from the mine records and individual contacts. Causes and dates of death were further verif...
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ژورنال
عنوان ژورنال: Occupational and Environmental Medicine
سال: 1984
ISSN: 1351-0711
DOI: 10.1136/oem.41.3.384