一起水源污染引起甲肝流行的调查报告

Investigation on Epidemic of Hepatitis A Induced by Contamination of Water Source

目的 了解镇远县羊坪镇 2 0 0 4年 1至 3月甲肝流行的流行病学特征及其流行因素 ,为今后的甲肝预防提供依据。方法 采取疫情核实和 1∶1配比的病例对照调查方法。结果 共发病77例 ,罹患率 6. 4 7‰ ;疫情波及该镇 10个行政村 ,主要集中在羊坪村和太坪村 ;2月份为发病高峰 ,5～ 19岁年龄多发 ,以学生为主 ;病例配对调查结果 :喝羊坪街上管网生水与病例有统计学联系(OR =4 . 17,1 71<OR<10 . 16 )。结论 饮用水源污染可能为本次甲肝流行的主要因素。应大力加强饮用水源的卫生学管理 。

Objective This investigation was to explore the epidemiological characteristics of hepatitis A and related epidemic factors from January to March of 2004 in Yangping Town of Zhenyuan County, and hence to provide basis for the prevention of hepatitis A for the future. Methods Verification of epidemic situation and case-control investigation were adopted. Results There were totally 77 cases of onset with an attack rate of 6 47‰; This epidemic spread over 10 administrative villages of the town, primarily centralizing in Yangping Village and Taiping Village; February was the peak of onsets, most of which were people aged from 5-19 years old with students as a predominant population; Results of case matched study: there was statistic relevance of drinking unboiled water from pipe network in the street of Yangping with the number of cases (OR=4 17 ,1 71<OR<10 16). Conclusion The pollution of drinking water source is likely to be the principal factors leading to this hepatitis A epidemic.