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© 1984 Oxford University Press

other

A cytogenetic study on workers exposed to low concentrations of benzene

F. Sarto , I. Cominato , A.M. Pinton , P.G. Brovedani , E. Merier 1, M. Peruzzi 2, V. Bianchi 3 and A.G. Levis 3 4

Istituto di Medicina del Lavoro, Università di Padova Via Facciolati 71, 35100 Padua
1Istituto di Anatomia Patologica, Università di Verona Borgo Roma, 37100 Verona
2U.S.S.L. n.45, Asola, 46100 Mantua
3Dipartimento di Biologia, Università di Padova Via Loredan 10, 35131 Padua, Italy

4To whom all correspondence should be addressed

A cytogenetic study was performed on 22 healthy workers engaged in benzene production and exposed to low concentrations of benzene, ranging from 0.2 to 12.4 p.p.m. (threshold limit value 10 p.p.m.). Workers were divided into two groups according to the different levels of exposure, inferrable also from the concentration of benzene in the alveolar air and the levels of urinary phenols. Each exposed subject was paired with a suitable control, living in the same area and of similar smoking habits and age. No statistically significant increase of sister chromatid exchange (SCE) frequency was observed in the exposed groups. In controls, SCE frequency was positively correlated with age and smoking habits. Among structural chromosomal aberrations, only the chromosome-type ones were significantly higher in exposed than in control subjects, and their increase was still significant when gaps were discarded.


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