苯(?)常见的毒物之一,对于长期接触苯作业者检查染色体畸变(CA)、微核(MN)、姐妹染色单体互换(SCE),观察各指标的变化是十分必要的.低浓度苯接触人群中,当白细胞计数未出现明显下降时,可出现细胞遗传学指标的改变,说明染色体损伤的出现早于白细胞数降低.因此这3种指标常被用来作为潜在致突变剂、致癌剂的短期筛查和接触毒物职业工作的健康监测. Benzene (?) One of the common poison, for long-term exposure to benzene operators check the chromosome aberration (CA), micronucleus (MN), sister chromatid exchange (SCE), observe the changes of various indicators is very necessary. Concentrations of benzene exposure to the population, when the white blood cell count did not appear significantly decreased, there may be cytogenetic changes, indicating the occurrence of chromosomal damage earlier than the white blood cell count, so these three indicators are often used as a potential mutagen, Short-term screening of carcinogens and health monitoring of occupational exposure to toxicants.