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1984年10～11月,我市某中等专业学校发生一起食物型福氏痢疾暴发流行。该校教工食堂201人就餐,学生食堂608人(女生占91.6％)就餐。两食堂相距约25m,在离教工食堂20m,学生食堂30m处有一厕所。教工食堂凭票就餐。学生食堂则自10月17日起把凭票就餐改为逐桌摆放饭菜后,以班、组为单位集体开饭,摆放的食物无防蝇设施,顺序由厨房远侧台桌至近侧台桌,暴露时间30～40分钟。10月27日中午观察学生食堂内苍蝇为:厨房远侧的桌有苍蝇10～22只,近侧的桌有苍蝇4～9只。
From October to November 1984, a food-borne outbreak of diarrhea occurred in a secondary specialized school in our city. The school canteen 201 dining, student canteen 608 people (91.6% of girls) dining. Two canteens apart about 25m, 20m from the canteen, student canteen 30m at a toilet. Staff canteen with tickets dining. From October 17, the student canteen changed its meal ticket to table-by-table meal and started the group meals in groups and groups. The food provided was free of flies and was provided in the order from the kitchen far table to the near table Table, exposure time 30 to 40 minutes. At noon on October 27, the flies in the student canteen were observed: 10 to 22 flies on the far side of the kitchen and 4 to 9 flies on the near side.