东社中学1985年10月份已有菌痢发生,11月下旬发生菌痢爆发流行,持续8天时间,发病40例,罹患率5.12%,发病对象主要是寄宿生。有5例病人和一名炊事员检出福氏群3.4痢疾杆菌,炊事员为健康带菌(与病人同一病原体)。学生及食堂共同使用的井水检出福氏痢疾杆菌(与病人同一菌群)。经采取井水消毒等 Eastern community secondary schools in October 1985 had bacillary dysentery occurred in late November outbreaks of bacillary dysentery for 8 days, the incidence of 40 cases, the attack rate of 5.12%, the incidence of the main boarders. Five patients and one cook detected a group of 3.Symptomatic members of the family of Shigella flexneri that the cook was carrying with him (the same pathogen as the patient). The well water used by students and canteens detects Shigella flexneri (the same flora as the patient). After taking well water disinfection