It has been well known that exposure of asbestos results in pulmonary diseases.
Pulmonary concentration of asbestos bodies (Ab) is a good indicator of asbestos exposure.
The aim of the present study is to determine the pulmonary concentration of Ab in
the Japanese urban population. We observed age dependent increase of incidence of
Ab. This may indicate that the very low level exposure of asbestos would be continued
in a daily life