ASSESSMENT OF MICRONUCLEUS FREQUENCY AND RESPIRATORY HEALTH SYMPTOMS AMONG TRAFFIC POLICEMEN EXPOSED TO BTEX AND PM2.5 IN KLANG VALLEY, MALAYSIA

Volatile organic compounds such as benzene, toluene, ethylbenzene, xylene (BTEX), and particulate matter (PM) with a diameter of less than 2.5 microns (PM2.5) are often associated with traffic-related air pollution (TRAP) and harm the health of the community. This study aimed to evaluate the personal air pollutant exposure, micronucleus (MN) frequency, and respiratory health symptoms among 160 traffic policemen and 149 office workers in Klang Valley. Personal exposure concentrations for BTEX and PM2.5 among traffic police were 390.12 mu g/m(3) and 140.00 mu g/m(3) respectively, whereas 97.64 mu g/m(3) (BTEX) and 23.00 mu g/m(3) (PM2.5) among office workers. Statistical analysis for MN frequency between traffic policemen (6.2 +/- 2.6) and office workers (3.0 +/- 2.0) shows a significant difference (p < 0.001). The Chi-Square test for respiratory health symptoms indicates that only cough shows the significant differences between traffic policemen and office workers (chi(2) = 5.645, p = 0.018, PR = 1.800). In short, this study showed that TRAP exposure would increase the chromosomal damage that can cause high MN frequency among traffic policemen and would increase the prevalence of respiratory health symptoms among urban workers.