الملخص
In order to substantiate the hypothesis of airborne pollution as the contributing source of asbestos bodies in the lungs of Thais, a further investigation was carried out in the Bangkok area during the period from March through December 1984. Two hundred and three samples were collected from 10 different main streets during week-day rush hours (8:30-9:30 a.m. and 3:30-4:30 p.m.). The results of the study showed an absolute absence of asbestos fibres. Although the negative findings do not indicate an inhalation route of asbestos entry into the lungs, there remains the possibility of occasional contamination of the air from potential sources of asbestos pollution in some localities during extremely rough weather. Ingestion of contaminated food and drinks could also be a route of entry.