title: A survey of black mineworkers of the Cape crocidolite mines.
abstract: Between 1974-1978, a study group 970 mineworkers exposed from before July 1962 only to Cape crocidolite were traced: 755 were alive and 215 dead. Of those still alive, 66.1% showed no radiological abnormalities of the chest; 8.9% had irregular small opacities only; 17.7% had pleural abnormalities only; and 7.3% had both. Five pleural mesotheliomas were found in living ex-workers; although only one was reported in those who had died, this was considered to be an underestimate. The incidences of pleural mesotheliomas in ex-employees of the mining industry outside of the study group are also described.
mesh_terms: D001741:Black or African American; D001194:Asbestos; D001195:Asbestosis / Q000453:epidemiology* / Q000209:etiology; D044383:Black People; D005500:Follow-Up Studies; D006801:Humans; D008654:Mesothelioma / Q000453:epidemiology* / Q000209:etiology; D008906:Mining; D010997:Pleural Neoplasms / Q000453:epidemiology* / Q000209:etiology; D013019:South Africa; D013997:Time Factors
chemical_list: D001194:Asbestos