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

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 epi demic 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