Martin D L, Gustafson T L, Pelosi J W, Suarez L, Pierce G V
Am J Epidemiol. 1986 Aug;124(2):299-305. doi: 10.1093/oxfordjournals.aje.a114388.
Simultaneous outbreaks of Shigella sonnei gastroenteritis occurred in October 1983 at two Texas university campuses 60 miles (96 km) apart. There were no common food handlers, recreational activities, water sources or swimming areas to explain the introduction of Shigella at both campuses. However, tossed salads were found to be associated with illness at both campuses. The investigation disclosed that both schools had received produce shipments from the same company during the week preceding these outbreaks. Shigella isolates from cases at both universities, sent to the Centers for Disease Control for plasmid analysis and colicin typing, were found to be identical. The same organism was evidently not a frequent cause of shigellosis within a 160-mile (256 km) radius of these universities since only 19% of control isolates chosen from this area were identical to the type which caused these outbreaks. This is the first report of two related outbreaks of shigellosis that were caused by a contaminated food source and not by a food handler. Simultaneous foodborne outbreaks of shigellosis should trigger a search for potential contamination at every step of food handling from farm to kitchen.
1983年10月，在相距60英里（96公里）的两所得克萨斯大学校园同时爆发了宋内志贺氏菌肠胃炎。两所校园没有共同的食品处理人员、娱乐活动、水源或游泳区域可以解释志贺氏菌在两处校园出现的原因。然而，发现凉拌沙拉与两所校园的发病情况都有关联。调查发现，在这些疫情爆发前的一周内，两所学校都收到了来自同一家公司的农产品货物。两所大学病例中分离出的志贺氏菌菌株被送往疾病控制中心进行质粒分析和大肠杆菌素分型，结果发现它们是相同的。显然，在这些大学半径160英里（256公里）范围内，这种病菌并非志贺氏菌病的常见病因，因为从该地区选取的对照菌株中只有19%与引发这些疫情的菌株类型相同。这是首次关于由受污染食物源而非食品处理人员导致的两起相关志贺氏菌病疫情的报告。同时发生的食源性志贺氏菌病疫情应促使人们在从农场到厨房食品处理的每一个环节寻找潜在污染源。
