Pneumoconiosis and fibrous glass

Reports have appeared in the public press suggesting that dust from fibrous glass may be responsible for causing a form of lung disease in workers similar to that produced by asbestos. These reports are attributed to information about a case of pneumoconiosis presented at a meeting held under the auspices of the National Cancer Institute on November 15, 1978. They have occasioned widespread concern among those who make and use fibrous glass. The purpose of this communication is to provide additional information which now shows that the case in question was almost certainly due to asbestos and not to exposure to fibrous glass.