Tehran University of Medical Sciences Journal of Food Safety and Hygiene 2476-3241 5 3 2020 10 07 241 241 Sung-Hee Han Seoul Metropolitan Government Research Institute of Public Health and Environment, Janggunmaeul 3-gil, Gwacheon-si, Gyeonggi-do, 13818, Korea. Sang-Hun park Seoul Metropolitan Government Research Institute of Public Health and Environment Sung-Sun Choi Seoul Metropolitan Government Research Institute of Public Health and Environment, Janggunmaeul 3-gil, Gwacheon-si, Gyeonggi-do, 13818, Korea. Young-Hee Jin Seoul Metropolitan Government Research Institute of Public Health and Environment, Janggunmaeul 3-gil, Gwacheon-si, Gyeonggi-do, 13818, Korea. Hee-Soon Kim Seoul Metropolitan Government Research Institute of Public Health and Environment, Janggunmaeul 3-gil, Gwacheon-si, Gyeonggi-do, 13818, Korea. Jin-Seok Kim Kim Seoul Metropolitan Government Research Institute of Public Health and Environment, Janggunmaeul 3-gil, Gwacheon-si, Gyeonggi-do, 13818, Korea. Joo-Hyun Park Seoul Metropolitan Government Research Institute of Public Health and Environment, Janggunmaeul 3-gil, Gwacheon-si, Gyeonggi-do, 13818, Korea. Jin Kyung Ryu Seoul Metropolitan Government Research Institute of Public Health and Environment, Janggunmaeul 3-gil, Gwacheon-si, Gyeonggi-do, 13818, Korea. Min-Ji Kang Seoul Metropolitan Government Research Institute of Public Health and Environment, Janggunmaeul 3-gil, Gwacheon-si, Gyeonggi-do, 13818, Korea. Su-Jin Jeon Seoul Metropolitan Government Research Institute of Public Health and Environment, Janggunmaeul 3-gil, Gwacheon-si, Gyeonggi-do, 13818, Korea. Chae-Kyu Hong Seoul Metropolitan Government Research Institute of Public Health and Environment, Janggunmaeul 3-gil, Gwacheon-si, Gyeonggi-do, 13818, Korea. So-Yun Park Seoul Metropolitan Government Research Institute of Public Health and Environment, Janggunmaeul 3-gil, Gwacheon-si, Gyeonggi-do, 13818, Korea. Ah-Ryung Oh Seoul Metropolitan Government Research Institute of Public Health and Environment, Janggunmaeul 3-gil, Gwacheon-si, Gyeonggi-do, 13818, Korea. Yun-Jung Kim Seoul Metropolitan Government Research Institute of Public Health and Environment, Janggunmaeul 3-gil, Gwacheon-si, Gyeonggi-do, 13818, Korea. So-Hyun Park Seoul Metropolitan Government Research Institute of Public Health and Environment, Janggunmaeul 3-gil, Gwacheon-si, Gyeonggi-do, 13818, Korea. Jib Ho Lee Seoul Metropolitan Government Research Institute of Public Health and Environment, Janggunmaeul 3-gil, Gwacheon-si, Gyeonggi-do, 13818, Korea. Young-Hee Oh Seoul Metropolitan Government Research Institute of Public Health and Environment, Janggunmaeul 3-gil, Gwacheon-si, Gyeonggi-do, 13818, Korea. 2020 04 03 2020 10 06 In September 2018, an outbreak of listeriosis cases in Korea was traced to food involved, using retrospective cohort studies and PFGE analyses. This study aimed to describe the first L.monocytogenes outbreak identified in Korea. We confirmed the presence of Serovar (4c) and virulence genes and evaluated the genetic correlation between isolates by restriction digestion patterns of ApaI and AscI. Based on the epidemiological association, it is presumed that the seasoned crab meat with bean sprouts is contaminated by cross-contamination during the bean sprouts washing (relative risk was 1.24; p-value: 0.0021) and human in Korea, and they possessed virulence genes. Therefore, active laboratory surveillance is necessary to recognize the risk of L. monocytogenes in Korea. https://jfsh.tums.ac.ir/index.php/jfsh/article/view/241 https://jfsh.tums.ac.ir/index.php/jfsh/article/download/241/119