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Occupational Medicine 1985;35:131-133
© 1985 Society of Occupational Medicine

research-article

Basalt Pneumoconiosis

SAMIR H. ELGHAWABI, RAWIA E. ZEWER, SAMIHA M. IBRAHIM and SAMIR R. SELIM

The National Institute of Occupational Safety and Health Heliopolis, Cairo

The health of a working population at the basalt crushing units of Abu-Zaabal quarry was studied. The prevalence of respiratory symptoms was statistically significant among this group compared with the controls. Twenty-eight cases of basalt pneumoconiosis were diagnosed giving an overall rate of 26-9 per cent among exposed workers. Pulmonary function tests revealed the occurrence of significant airway obstruction at an earlier stage and to a greater extent than the restrictive pathology. A significant increment in RV values was found in all exposed workers and the RV/TLC was significantly elevated. The effect of smoking, presence of chronic bronchitis and duration of occupational exposure, together with the type of work performed on the pulmonary indices were studied.

Requests for reprints should be addressed to: Dr Samir H. El-Ghawabi, Head of Research Units, The National Institute of Occupational Safety and Health, P.O. Box 2208, El-Horreya, Heliopolis, Egypt.


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