Disease Management Division, Deogyang-gu Public Health Center, Goyang, Korea.
Department of Epidemiology and Health Promotion, Graduate School of Public Health, Yonsei University, Seoul, Korea.
Epidemiol Health. 2024;46:e2024036. doi: 10.4178/epih.e2024036. Epub 2024 Mar 7.
Salmonellosis outbreaks occurred at 2 restaurants 2 days apart, and an epidemiological investigation was conducted to determine whether the outbreaks were connected.
Case studies were conducted for both outbreaks. Stool samples were collected from individuals, and food samples were collected from the restaurants. Pulsed-field gel electrophoresis (PFGE) and whole-genome sequencing analyses were performed on outbreak-related Salmonella enterica serovar Enteritidis (Salmonella Enteritidis) isolates. Traceback investigations were also conducted for the ingredients from gimbap restaurants A and B.
In total, 106 people from gimbap restaurant A and 5 from gimbap restaurant B met the case definition. Salmonella Enteritidis was detected in samples from 2 food handlers, 22 patients, and 1 food (iceberg lettuce) at gimbap restaurant A and from 1 patient at gimbap restaurant B. According to PFGE, all isolates were identified as SEGX01.089. The molecular typing of all isolates showed the same pattern, and the genetic distance was close according to phylogenetic analysis. Eggs were the only food ingredient that was supplied to both gimbap restaurants.
The outbreaks were caused by Salmonella Enteritidis, and the source of infections was suspected to be contaminated eggs. To prevent foodborne outbreaks of Salmonella, restaurants should heat eggs sufficiently, and egg farms need to establish management systems that prevent Salmonella infections.
相隔两天，两家餐厅相继爆发了沙门氏菌病疫情，为此开展了一项流行病学调查，以确定这些疫情是否存在关联。
对两起疫情均开展了病例研究。采集了个体的粪便样本，以及来自餐厅的食物样本。对与暴发相关的肠炎沙门氏菌血清型肠炎亚种（肠炎沙门氏菌）分离株进行了脉冲场凝胶电泳（PFGE）和全基因组测序分析。还对两家紫菜包饭店的食材进行了追溯调查。
共有 106 名来自紫菜包饭店 A 的人和 5 名来自紫菜包饭店 B 的人符合病例定义。在紫菜包饭店 A 的 2 名食品处理人员、22 名患者和 1 种食物（冰山生菜）以及紫菜包饭店 B 的 1 名患者的样本中检测到了肠炎沙门氏菌。根据 PFGE，所有分离株均被鉴定为 SEGX01.089。所有分离株的分子分型显示出相同的模式，根据系统发育分析，遗传距离较近。鸡蛋是仅供应给两家紫菜包饭店的食物原料。
这些疫情是由肠炎沙门氏菌引起的，感染源疑似为受污染的鸡蛋。为防止食源性沙门氏菌病暴发，餐厅应充分加热鸡蛋，而鸡蛋养殖场则需要建立防止沙门氏菌感染的管理制度。
