Bettelheim K A, Cooke E M, O'Farrell S, Shooter R A
J Hyg (Lond). 1977 Aug;79(1):43-5. doi: 10.1017/s0022172400052839.
During an 8-week period all specimens of stool passed by six nurses were examined for the presence of Escherichia coli and all isolations of this organism were serotyped. During the middle 4 weeks of the period the nurses ate a sterile diet. A smaller number of serotypes was isolated during the period of sterile diet than during the period when normal food was eaten. This finding supports the view that normal food is a source of strains of E. coli present in the bowel. Some new serotypes of E. coli did appear during the period of sterile diet. The possible sources of these are discussed.
在为期8周的时间里,对6名护士排出的所有粪便样本进行了大肠杆菌检测,并对所有分离出的这种细菌进行了血清分型。在这一时期的中间4周,护士们食用无菌饮食。与食用正常食物期间相比,无菌饮食期间分离出的血清型数量较少。这一发现支持了正常食物是肠道中存在的大肠杆菌菌株来源的观点。在无菌饮食期间确实出现了一些新的大肠杆菌血清型。文中讨论了这些血清型可能的来源。