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目的了解上海市地铁车站室内空气中微生物分布状况。方法对地铁车站站台环境和室外环境中的细菌、真菌进行采样检测,并对数据进行统计学分析。结果车站内细菌菌落数低于室外对照点,真菌菌落数则高于室外,差异均有统计学意义(P<0.05)。地铁车站内颗粒粒径在4.70μm以上的微生物数量低于室外对照点,差异有统计学意义(P<0.05)。地铁车站空气中微生物主要附着于0.65~4.70μm粒径的颗粒物上。结论由于5.00μm以下的颗粒可以进入到人体下呼吸道,富含致病微生物的颗粒物会对人体健康带来危害。地铁车站内粒径在5.00μm以下的微生物气溶胶应成为重点监控对象。
Objective To understand the distribution of microorganisms in indoor air of Shanghai Metro Station. Methods The bacteria and fungi in the platform environment and outdoor environment of the subway station were sampled and tested, and the data were statistically analyzed. Results The number of bacterial colonies in the station was lower than that in outdoor control and the number of fungal colonies was higher than that in the outdoors. The difference was statistically significant (P <0.05). The number of microorganisms with particle size above 4.70μm in subway stations was lower than that of outdoor control points, the difference was statistically significant (P <0.05). The airborne microorganisms in the station are mainly attached to the particles of 0.65 ~ 4.70μm in diameter. Conclusion Due to particles below 5.00μm can enter the lower respiratory tract, particles rich in pathogenic microorganisms will be harmful to human health. Microbiological aerosols with the particle size below 5.00μm in the subway station should be the key monitoring objects.