轨道交通日益成为城市快捷公共交通运输的重要组成部分,其密闭、潮湿、噪音大的环境特点常常伴发空气质量差及生物性污染。为掌握世博会执勤部队的发病情况及其特点,2010-04至2010-06笔者每周对轨道内、外执勤官兵发病情况进行了调查。1对象与方法1.1对象来源于世博会同一大环境下进行安保执勤的部队官兵,均为男性,年龄18～35岁,其中轨道组为在轨道交通站点内执行站岗和巡查任务执勤官兵,常态组为负责轨道 Rail transit is increasingly becoming an important part of urban rapid public transport. Its confined, humid and noisy environmental characteristics are often associated with poor air quality and biological contamination. To master the incidence of the World Health Organization on duty and its characteristics, 2010-04 to 2010-06 I conducted a weekly survey of the incidence of officers and soldiers on duty inside and outside the rail. 1 objects and methods 1.1 objects from the same environment in the Expo environment for security officers and men of the armed forces, are men, aged 18 to 35 years, of which the track group in the rail transit stations and guard duty station guard standing guard, the normal group Responsible for the track