Abstract
The concentration of lead in the whole blood of 203 traffic policemen, whose mean value and standard error of lead content in blood showed 9.60±0.22 (95% upper limit of 13.7) μg/100 ml of blood, differed from the large in scale of cities at low lead con-centration less than 10 μg/m3 of air.In comparison between traffic policemen and lead workers, the latter were signifi-cantly higher at the lead content and ALAD activity in erythrocytes than those of the former. The correlation between ALAD activity in erythrocytes and lead con-centration in blood was found in both workers, but among the samples under 15.0 μg pb/100 ml of blood in traffic policemen was not observed significant decrease of ALAD activity and any correlation.
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