Reduced cadmium and lead burden in Japan in the past 10 years.
Objective To investigate the current levels of exposure of the Japanese population to cadmium and lead, in comparison with the levels in 1980s.
Design A nation wide survey was conducted in 1991-1994 (the 1990 study) in 19 study sites in Japan as a follow-up to a study conducted in 1979-1983 (the 1980 study).
Blood samples and 24-h total food duplicates were collected from women who did not smoke or drink habitually.
Methods Blood and food duplicates (after homogenization) were analysed for cadmium (Cd-B and Cd-F, respectively) and lead (Pb-B and Pb-F) by graphite furnace atomic absorption after wet-ashing.
Results Altogether, 467 women volunteered for blood sampling.
Of these women, 375 also gave food duplicates.
Geometric mean (GM) Cd-B levels in the 1990 study were lower than the corresponding 1980 values in most study sites so that the 1990 grand GM (1.98 ng/ml) for Cd-B was significantly lower than the 1980 GM (3.58 ng/ml).
This reduction in Cd-B was related to the reduction in Cd-F (GM for Cd-F was 38.0 mug/day in the 1980 study and 30.0 mug/day in the 1990 study).
Dietary intake was almost exclusively the route of Cd burden among the populations studied.
Both Pb-B and Pb-F also showed a remarkable reduction, i.e. from 33.9 ng/ml (1980 GM) to 23.2 ng/ml (1990 GM) in the case of Pb-B, and from 32.2 mug/day (1980 GM) to 7.1 mug/day (1990 GM) in the case of Pb-F. (...)
Mots-clés Pascal : Cadmium, Plomb, Métal lourd, Taux, Sang, Epidémiologie, Evolution, Contamination, Riz, Pollution, Santé et environnement, Japon, Asie, Homme, Alimentation
Mots-clés Pascal anglais : Cadmium, Lead, Heavy metal, Rate, Blood, Epidemiology, Evolution, Contamination, Rice, Pollution, Health and environment, Japan, Asia, Human, Feeding
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 96-0328973
Code Inist : 002B03L05. Création : 10/04/1997.