Biomonitoring methods were applied to workers exposed to high levels of chloronitrobenzenes. The external dose, internal dose, biologically effective dose, and biological effects were determined. Individual susceptibility was assessed by analyzing genetic polymorphisms of glutathione S-transferases M1, P1 and T1, and N-acetyltransferases 1 and 2. When the markers of exposure and susceptibility were compared with the frequency of chromosomal aberrations, clinical blood and urine parameters, and health effects typical of chloronitrobenzenes exposure, only a few of the comparisons were statistically significant. A statistically significantly higher frequency of chromosomal aberrations was detected in workers with a high level of hemoglobin-adducts.
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