title: A food-borne outbreak of gastroenteritis caused by different Salmonella serotypes in 2 universities in Xiamen, Fujian, China, in 2012.
abstract: We investigated a diarrhea outbreak in 2 universities to identify the etiological agent responsible, the source of infection, the mode of transmission, and the risk factors. A case-controlled study was conducted using case students and asymptomatic control students who were selected randomly and frequency-matched according to class and age, and the source of food or water intake was investigated. Of the total 22,404 students at the universities, 0.25% developed Salmonella Infections. A total of 96% (54/56) of the case students and 30% (35/117) of the control students consumed bread products provided by the same vendor (odds ratio [OR] = 63.3; 95% confidence interval [CI], 14.9-550.7). Among the students who consumed bread, 96% (52/54) of the case students and 9% (3/35) of the control students ate egg sandwiches (OR = 277.3; 95%CI, 43.9-1,750.8). Seven strains of Salmonella enteritidis and 6 strains of S. chester were isolated from the case students or food samples. Pulsed-field gel electrophoresis typing showed the same patterns. The outbreak of gastroenteritis was caused mainly by egg sandwiches contaminated with different serotypes of Salmonella.
authors: Xiamen Center for Disease Control and Prevention.
authors: Zhinan
authors: Z
authors: Guo
authors: Cheng hao
authors: Ch
authors: Su
authors: Jianwei
authors: J
authors: Huang
authors: JianJun
authors: J
authors: Niu
mesh_terms: D000293:Adolescent; D000328:Adult; D002681:China / Q000453:epidemiology; D004196:Disease Outbreaks / Q000706:statistics & numerical data*; D005260:Female; D005517:Foodborne Diseases / Q000453:epidemiology* / Q000382:microbiology; D005759:Gastroenteritis / Q000453:epidemiology* / Q000382:microbiology; D006801:Humans; D008297:Male; D012475:Salmonella / Q000145:classification / Q000235:genetics*; D012480:Salmonella Infections / Q000453:epidemiology* / Q000382:microbiology; D014495:Universities; D055815:Young Adult