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辽宁省某镇军民,自1986年12月25日至1987年2月17日,因水源被污染,引起急性甲型肝炎暴发流行。 (一) 流行特征 发病率高,流行期间,发生急性甲型肝炎107例,地方和部队发病率分别为7.6‰和20.8‰,儿童和青壮年发病多,14岁以下儿童发病63例,青壮年发病34例,分别占发病总人数的58.9％和31.8％;发病时间较集中,从首发病例到发病高峰,仅半个月时间,呈单峰型;临床表现有明显的消化道症状,如厌油、食欲减退、恶心呕吐,多数
A military and civilian town in Liaoning Province, from December 25, 1986 to February 17, 1987, was contaminated with water and caused an outbreak of acute hepatitis A. (1) The prevalence of epidemic features is high. During the epidemic, 107 cases of acute hepatitis A occurred. The incidence rates of local and military units were 7.6 ‰ and 20.8 ‰, respectively. Children and young adults had more incidences, 63 cases of children under 14 years old and young adults The incidence of 34 cases, accounting for 58.9% of the total number of cases and 31.8%; onset time is more concentrated, from the first case to the peak incidence, only half a month, was a single peak; clinical manifestations of gastrointestinal symptoms, such as tired Oil, loss of appetite, nausea and vomiting, most