[Occupational asthma].

Bronchial asthma has been defined as a state of airway obstruction of variable degree correlated casually with exposure to volatile dusts, gases, vapours or fumes in the working environment. In this review we considered the causes of occupational asthma, the diagnosis, the pattern of asthmatic reactions and their mechanism, the predisposing factors, the epidemiology, the prognosis and finally the cure and prevention (review article, 165 references).