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一次夏令营中,在455名营员和工作人员中,35%发生胃肠炎,表现为腹痛、发热、腹泻、恶心和呕吐。通过随机抽取1/3病人与等量对照的配比调查及采集不同饮用水源、当地小河与游泳池水样、多种食物样品、玩赏犬、炊事人员、住院病人和少数健康者粪便标本以及部分病人双份血清的检查,发现不同性别的罹患率无明显差别;营员和顾
In a summer camp, 35% of the 455 campers and staff members had gastroenteritis with abdominal pain, fever, diarrhea, nausea and vomiting. By randomly selecting one third of patients and comparing with the same amount of control, and collecting different drinking water sources, local stream and swimming pool water samples, various food samples, playing dogs, cooking staff, inpatients and a few healthy stool samples and part Patients double serum examination and found no significant difference in the incidence of different sex; campers and Gu