Micronuclei analysis in lymphocytes of pesticide sprayers from Concepción, Chile.
To estimate the genetic risk associated with pesticide exposure in a defined population, the frequency of micronuclei (MN) in peripheral blood lymphocytes from a group of 22 pesticide sprayers from Concepción, Chile, occupationally exposed to pesticide mixtures was evaluated. After scoring 1,000 binucleated cells for each donor, no significant increases were observed either for the total number of MN or for binucleated cells with MN, when compared with a concurrent control population. In addition, when the effects of different confounding factors such as age, smoking, and drinking habits were considered, no significant effect was observed. Our conclusion is that, in this specific group of workers and under the particular conditions of exposure to pesticides, when evaluated by the micronucleus assay, no genetic risk was detected.