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1990年4月,河北省某医院发生了腹泻暴发。全院共3415人,发病1279例,罹患率达37.45%,其中院内居住职工761人,发病402例,院外居住832人,仅发病35例。各年龄、性别、职业均有发病,且患者大都有饮用同一水源水历史。当供水系统实施消毒后,
In April 1990, a diarrhea outbreak occurred in a hospital in Hebei Province. The hospital a total of 3415 people, the incidence of 1279 cases, the attack rate of 37.45%, of which 761 were hospital residents, incidence of 402 cases, 832 people living outside the hospital, only the incidence of 35 cases. All ages, genders, occupations have morbidity, and most patients have the history of drinking the same source of water. When the water supply system disinfection,