Journal of Medicine and Life Science

Institute for Medical Science (제주대학교 의과학연구소)
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A Salmonella-related foodborne outbreak in a snack bar in Jeju Province: an epidemiological investigation

1개 분식점에서 발생한 살모넬라 식중독 집단 발생 역학조사

  • Cho, Eun-Suk (Jeju Center for Infectious Diseases Control and Prevention) ;
  • Lee, Seung Hyuk (Bureau of Health-Welfare-Women, Jeju Special Self-Governing Province) ;
  • Bae, Jong-Myon (Jeju Center for Infectious Diseases Control and Prevention)
  • 조은숙 (제주감염병관리지원단) ;
  • 이승혁 (제주도청 보건복지여성국) ;
  • 배종면 (제주감염병관리지원단)
  • Received : 2021.04.29
  • Accepted : 2021.07.21
  • Published : 2021.08.30
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Abstract

Many people reported suspected food poisoning after consuming food at the same snack bar on June 18, 2020. Thus, an in-depth epidemiological investigation was conducted to identify the infectious agent and establish additional food poisoning prevention measures. The study included people who reported to the local public health center after June 18 with acute gastroenteritis symptoms within 4 days of consuming food from the snack bar. The onset of symptoms and food items consumed by individuals were then investigated via phone calls and on-site visits. Afterward, the infectious agent was identified from human samples (stool or rectal swab) of four restaurant employees and 89 people and from environmental samples (materials, cooking utensils, and water). The analysis revealed that the incubation period ranged from 2 hours to 92 hours, with a median and mode of 16 hours and 12 hours, respectively. Moreover, the epidemic curve had a unimodal shape because of common exposure, which reached its peak on June 18. After monitoring for 8 days, which is more than twice the maximum incubation period of 92 hours, the end of the epidemic was declared on June 28 as no additional cases were reported. Analysis of human and environmental samples revealed Salmonella bareilly of the pulsed-field gel electrophoresis pulsotype SAPX01.017 as the causative agent. Therefore, it was concluded that the food poisoning outbreak was caused by S. bareilly.

Keywords

Acknowledgement

심층 역학조사를 위해 현장에서 정보 수집과 검체 채취를 해 주신 제주도 제주시 제주보건소 김난금, 김윤미 주무관님과 제주시 위생관리과 이인옥, 고선 주무관님, 제주도환경보건연구원의 실험실 실무자에게 감사를 표합니다.

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