论文部分内容阅读
人们也许会认为长期接触煤尘对肺癌的发生可能有影响,至于对胃癌或食道癌则关系不大。因为煤尘与其它粉尘一样,是经呼吸道进入体内的。然而,流行病学调查结果却恰好与之相反。许多资料表明:煤矿工人的肺癌死亡率与一般人群比较并无明显差异,但胃癌死亡率则高于非煤尘接触人群。这一现象目前已逐渐引起各国学者的关注。除了进行更深入广泛的流行病学调查以外,也做了一些煤尘诱癌的动物试验和体外致突变试验。
People may think long-term exposure to coal dust on the incidence of lung cancer may have an impact, as for gastric cancer or esophageal cancer is not much. Because coal dust, like other dust, enters the body through the respiratory tract. However, the epidemiological survey results are exactly the opposite. Many data show that: coal miners lung cancer mortality rates compared with the general population there was no significant difference, but the gastric cancer mortality was higher than non-coal dust exposure to the crowd. This phenomenon has gradually attracted the attention of scholars from various countries at present. In addition to carrying out a more extensive and extensive epidemiological investigation, some animal experiments and in vitro mutagenesis experiments on coal dust inducing cancer have been done.