2004年6月上旬,我们接到甘井子区疾病预防控制中心报告,近几天,甘井子区某社区一居民楼出现一种大黑虫子,于21～22时群居爬出,数量较多,为此,我们立即前往现场调查。1基本情况该居民楼建于20世纪50年代,共4层,面积约3000m2,80年代前该楼是职工集体宿舍,共用一个水房,一个厕所, In early June 2004, we received a report from Ganjingzi CDC. In recent days, a large black insect appeared in a residential building in a community in Ganjingzi District and climbed out from 21 to 22 in a large number. To this end, we immediately went to the scene investigation. A basic situation The residential building was built in the 20th century, 50 years, a total of 4 layers, an area of ​​about 3000m2, before the end of the 1980s is a collection of Dormitory, sharing a water room, a toilet,