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To study the possible cytogenetic effects of electricity workers in Coimbatore District and surrounding region (Tamil Nadu, South India) exposed to electric and magnetic fields.
70 subjects participated including 50 exposed and 20 controls. The exposed group was divided into two subgroups: The "direct exposure group" (n=28) included electrical employees in transformers and power lines and the "indirect exposure group" (n=22) included office workers in place adjacent to electric supply substations. Additionally, the subjects were divided into two groups according to their age (≤ 40 years (n=37) and >40 (n=33)).
ばく露時間: from 20 ± 4.7 (direct exposure group) up to 23 ± 6 years (indirect exposure group)
|ばく露時間||from 20 ± 4.7 (direct exposure group) up to 23 ± 6 years (indirect exposure group)|
|電界強度||130 V/m||minimum||測定値||-||at the surroundings of power generation and transmission systems|
|電界強度||8,310 V/m||maximum||測定値||-||at the surroundings of power generation and transmission systems|
|電界強度||300 V/m||minimum||測定値||-||inside of power generation and transmission systems|
|電界強度||15,000 V/m||maximum||測定値||-||inside of power generation and transmission systems|
|磁界強度||0.5 A/m||minimum||測定値||-||around the transformer buildings|
|磁界強度||1.7 A/m||maximum||測定値||-||around the transformer buildings|
|磁界強度||0.25 A/m||minimum||測定値||-||inside the transformer buildings|
|磁界強度||17 A/m||maximum||測定値||-||inside the transformer buildings|
A higher degree of chromosome aberrations and micronuclei formation was found in exposed subjects compared to controls and the frequency of chromosome aberrations was significantly enhanced with long years of exposure. Moreover, an increase in chromosome aberration and micronuclei formation with age was observed in both exposed subjects and controls, but it was significantly greater in the exposed one.
The data indicate a significant induction of cytogenetic damage in peripheral lymphocytes of workers occupationally exposed to electric and magnetic fields in electric transformer and distribution stations.