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我们于1990年4月23日～5月4日对济南市历下、天桥、市中及槐荫4个市区进行头虱感染调查。每个市区随机抽查2所小学,每所小学随机抽查2～3个班,共查8所小学16个班1083人,男556人,女527人。共发现感染者42人,感染率为3.88%。
From April 23 to May 4, 1990, we conducted a head-lice infection survey in 4 urban areas of Lixia, Tianqiao, Shizhong and Huaiyin in Jinan City. Each urban area randomly selected two primary schools, each primary school randomly selected 2 to 3 classes, a total of 8 elementary schools surveyed 1,083 16 classes, 556 males and 527 females. A total of 42 people were found infected, the infection rate was 3.88%.