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1989年6月18日,克旗土城子镇儿童中出现甲型肝炎病人,至11月15日共发生患者288例,疫情涉及全镇80％的地区,平均罹患率1.93％。经调查,多数患者起病急骤,病情较重,症状典型,黄疸占90.97％。临床检验97份,GPT升高30.92％,采病人和密切接触者9份血清做抗HAV-IgM阳性率为77％,证明是甲肝。此次甲肝流行以镇所在地为多,占全镇病人总数的32.64％。土城子村小学发病105人,占该校学生的29.17％,经分析,家庭聚集率为:30.90％。流行开始于6月中旬,10月份达高峰,11月迅速下降。年龄以5～
On June 18, 1989, hepatitis A patients were found among children in Chengzizi Town, Keqi. By November 15, 288 patients had occurred. The epidemic involved 80% of the town and the average attack rate was 1.93%. After investigation, most patients with sudden onset, severe condition, typical symptoms, jaundice accounted for 90.97%. Clinical tests 97, GPT increased 30.92%, mining patients and close contacts 9 serum anti-HAV-IgM positive rate of 77%, proved to be hepatitis A. The prevalence of hepatitis A to the town as much, accounting for 32.64% of the total number of patients in the town. Tuchengzi village primary school incidence of 105 people, accounting for 29.17% of the school students, the analysis, the family aggregation rate was: 30.90%. The epidemic started in mid-June and peaked in October, declining rapidly in November. Age to 5 ~