Abstract

Chromosome analyses in peripheral lymphocytes of 29 policemen who are permanently in contract with high levels of automotive exhaust and consequently with high lead concentrations were carried out. Although a 20–30% increase of blood lead level, erythrocyte porphyrin and σ-aminolaevulinic acid excretion was found in comparison with the levels in 20 controls drawn from the average population, no chromosome damage which can be causally related to lead could be demonstrated.

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