1999年 9月上旬 ,临沂市河东区某中学暴发了一起急性皮炎 ,据流行病学调查 ,临床特征观察和实验室检查 ,证实为袋形虱螨引起的螨皮炎暴发。现将情况报告如下。1　流行病学调查1 1　发病情况　该中学 1999年新招收高一学生 4 85名 ,新分配老师 2 3名。 9月 2日 ,即开学后的第二 In early September 1999, a secondary dermatitis broke out in a middle school in Hedong District, Linyi City. According to epidemiological investigation, clinical observation and laboratory tests, the outbreak of mite dermatitis caused by bagged louse mites was confirmed. Now the situation is reported as follows. 1 Epidemiological survey 1 1 The incidence of secondary school enrollment in 1999, the new high school students 4 85, 23 newly assigned teachers. September 2, the second after school