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1997年11月21~25日，河北省某大学发生一起食物中毒。经流行病学调查分析和实验室检验，证实为沙门氏菌污染食物引起。1流行特点1．1发病时间：首例病人出现在11月22日；对日发病5例；24日达高峰为一例；25日发病14例后终止。1．2人群分布：经调查本次食物中毒共发病刀例，其中
From November 21 to November 25, 1997, a food poisoning occurred in a university in Hebei Province. The epidemiological investigation and laboratory tests confirmed that Salmonella contaminated food caused. 1 epidemic characteristics 1.1 onset time: the first patient appeared on November 22; 5 cases of Japanese onset; reached a peak on the 24th; 25 cases after the onset of termination in 14 cases. 1.2 population distribution: After investigation of the common case of food poisoning knife cases, of which