一、初步分析根据初步调查获得的临床和流行病学资料,可以对本病的诊断和暴发原因作出如下分析。 (一)关于诊断问题本次暴发31例病人发生于12月2日18～24时之内,流行过程仅5个半小时。这说明本病潜伏期很短,所有病人在发病前数小时内曾暴露于共同病因。31例病人均无发热,可以排除病原微生物感 First, the preliminary analysis According to the preliminary investigation obtained clinical and epidemiological data, the diagnosis of the disease and the reasons for the outbreak made the following analysis. (A) on the diagnosis of the 31 cases of the outbreak occurred in December 2 18 ~ 24, the prevalence of only 5 and a half hours. This shows that the incubation period is very short, all patients were exposed to common causes within a few hours before onset. None of the 31 patients had fever, which could rule out the presence of pathogenic microorganisms