Micronuclei and sister chromatid exchange in peripheral blood lymphocytes were analysed in 21 workers of two metal-working companies in Italy with considerable long-term exposure to 50 Hz magnetic fields during electric arc welding. 21 non-exposed blood donors served as reference group.
Individual exposure assessment in 21 workers of two metal-working companies.
|Exposure duration||during the working shift (7 am to 5 pm)|
Micronuclei frequency in the exposed workers was significantly higher compared to the controls. In contrast, the data also showed a significant decrease in sister chromatid exchange frequency in exposed subjects compared to the controls. Proliferative rate and cytokinesis-block proliferation index were similar in the two groups.